Release Notes for the Catalyst 4500 Series Switch, Cisco IOS Release 12.2(40)SG Current Release 12.2(40)SG—November 13, 2007 Previous Releases 12.2(37)SG1, 12.2(37)SG, 12.2(31)SGA5, 12.2(31)SGA4, 12.2(31)SGA3, 12.2(31)SGA2, 12.2(31)SGA1, 12.2(31)SGA, 12.2(31)SG3, 12.2(31)SG2, 12.2(31)SG1, 12.2(31)SG, 12.2(25)SG4, 12.2(25)SG3, 12.2(25)SG2, 12.2(25)SG1, 12.2(25)SG, 12.2(25)EWA13, 12.2(25)EWA12, 12.2(25)EWA11, 12.2(25)EWA10, 12.2(25)EWA9, 12.2(25)EWA8, 12.2(25)EWA7, 12.2(25)EWA6, 12.2(25)EWA5, 12.
Cisco IOS Software Packaging for the Cisco Catalyst 4500 Series • Orderable Product Numbers:, page 2 • Catalyst 4500 Series Switch Cisco IOS Release Strategy, page 6 • System Requirements, page 7 • New and Changed Information, page 22 • Upgrading the System Software, page 39 • Limitations and Restrictions, page 51 • Caveats, page 62 • Troubleshooting, page 285 • Related Documentation, page 287 • Notices, page 290 • Obtaining Documentation, Obtaining Support, and Security Guidelines, pa
Cisco IOS Software Packaging for the Cisco Catalyst 4500 Series • S45IPBK9-12240SG—Cisco IOS software for the Catalyst 4500 Series Supervisor Engine 6-E (IP Base Image with 3DES) (cat4500-ipbasek9-mz) • S45EES-12240SG—Cisco IOS software for the Catalyst 4500 Series Supervisor Engine 6-E (Enterprise Services image) (cat4500e-entservices-mz) • S45EESK9-12240SG—Cisco IOS software for the Catalyst 4500 Series Supervisor Engine 6-E (Enterprise Services with 3DES image) (cat4500-entservicesk9-mz) • S45IPB
Cisco IOS Software Packaging for the Cisco Catalyst 4500 Series Note We recommend that you load 12.2(31)SGA4. • S4KL3E-12225EWA—Cisco IOS software for the Catalyst 4500 series switch, enhanced Layer 3 and voice software image including OSPF, IS-IS, and EIGRP, Release 12.2(25)EWA (cat4000-i5s-mz.122-25.
Cisco IOS Software Packaging for the Cisco Catalyst 4500 Series • S4KL3EK91-12218EW—Cisco IOS software for the Catalyst 4500 series switch, with 3DES strong encryption, enhanced Layer 3 and voice software image including (OSPF, IS-IS, and EIGRP), Release 12.2(18)EW (cat4000-i5k91s-mz.122-18.EW) • S4KL3-12120EW—Cisco IOS software for the Catalyst 4500 series switch, basic Layer 3 and voice software image (RIPv1, RIPv2, Static Routes, AppleTalk, and IPX), Release Software Routing, Release 12.
Catalyst 4500 Series Switch Cisco IOS Release Strategy • S4KL3E-12111EW—Cisco IOS software for the Catalyst 4500 series switch, enhanced Layer 3 software image including OSPF, IGRP and EIGRP, Release 12.1(11b)EW1 • S4KL3-12108EW—Cisco IOS software for the Catalyst 4500 series switch, basic Layer 3 software image (RIP, static routes), Release 12.1(8a)EW • S4KL3E-12108EW—Cisco IOS software for the Catalyst 4500 series switch, enhanced Layer 3 software image including OSPF, IGRP and EIGRP, Release 12.
System Requirements Figure 1 Software Release Strategy for the Catalyst 4500 Series Switch 12.2(18)S 12.2(25)S 12.2(30)S 12.2(37)S 12.2S Train 12.2(31)SG 12.2(31)SGA 12.2(37)SG EoS 12.2(25)SG 12.2(18)EW 12.2(18)EW6 Q2CY06 12.2(31)SGA Maintenance Train 12.2(25)EWA 12.2(25)EWA6 Maintenance Train EoS STOP 230904 12.2SG Cisco IOS Software Reformation 12.2(25) EWA 12.
System Requirements Supported Hardware on Catalyst 4500 Series Switch Table 1 lists the hardware supported on the Catalyst 4500 Series Switch. Table 1 Supported Hardware Product Number (append Product Description with “=” for spares) Software Release Minimum Recommended Supervisor Engines WS-X4013+= Catalyst 4500 series switch Supervisor Engine II-Plus 12.1(19)EW 12.2(31)SGA4 WS-X4013+TS Catalyst 4500 series switch Supervisor Engine II-Plus-TS 12.2(20)EWA 12.
System Requirements Table 1 Supported Hardware (continued) Product Number (append Product Description with “=” for spares) Software Release Minimum Recommended WS-X4148-FX-MT 48-port 100BASE-FX Fast Ethernet MT-RJ multimode fiber switching module 12.1(8a)EW 12.2(31)SGA4 WS-X4148-FE-LX-MT 48-port 100BASE-LX10 Fast Ethernet MT-RJ single-mode fiber switching module 12.1(13)EW 12.2(31)SGA4 WS-X4148-FE-BD-LC 48-port 100BASE-BX10-D module 12.2(18)EW 12.
System Requirements Table 1 Supported Hardware (continued) Product Number (append Product Description with “=” for spares) Software Release Minimum Recommended GLC-LH-SM 1000BASE-LX/LH small form-factor pluggable module 12.2(20)EW 12.2(31)SGA4 GLC-ZX-SM 1000BASE-ZX small form-factor pluggable module 12.2(20)EW 12.2(31)SGA4 GLC-T 1000BASE-T small form-factor pluggable module 12.2(20)EW 12.
System Requirements Table 1 Supported Hardware (continued) Product Number (append Product Description with “=” for spares) Software Release Minimum Recommended PWR-C45-1400DC Catalyst 4500 series switch 1400 Watt DC triple input power supply (data-only) 12.2(25)EW 12.2(31)SGA4 PWR-C45-1400DC-P Catalyst 4500 series switch 1400 Watt DC power supply with integrated PEM 12.1(19)EW 12.2(31)SGA4 PWR-C45-1400AC Catalyst 4500 series switch 1400 Watt AC power supply (data-only) 12.1(12c)EW 12.
System Requirements Table 3 briefly describes the seven chassis in the Catalyst 4500 Series Switch. For the chassis listed in the table, refer to Table 4 on page 13 for software release information.
System Requirements Table 4 Supervisor Engine Support on the Catalyst 4500 Series Switch Supervisor Engine Software Release Minimum Recommended Supervisor Engine II Catalyst operating system software Supervisor Engine II-Plus 12.1(19)EW 12.2(31)SGA4 Supervisor Engine II-Plus-TS 12.2(20)EWA 12.2(31)SGA4 Supervisor Engine II-Plus-10GE 12.2(25)SG 12.2(25)SG4 Supervisor Engine IV 12.1(12c)EW 12.2(31)SGA4 Supervisor Engine V 12.2(18)EW 12.2(31)SGA4 Supervisor Engine V-10GE 12.2(25)EW 12.
System Requirements Table 6 Supported E-Series Hardware Product Number Description WS-C4510R-E Cisco Catalyst 4500 E-Series 10-Slot Chassis WS-X45-Sup6-E • Fan tray • No Power Supply • Redudant supervisor engine capability Cisco Catalyst 4500 E-Series Sup 6-E, 2x10GE(X2) w/ TwinGig WS-X4648-RJ45V-E • Cisco Catalyst 4500 E-Series 48-Port PoE 802.
System Requirements Table 7 Cisco IOS Software Feature Set for the Catalyst 4500 Series and E-Series Switch Spanning-tree Loop guard and PortFast BPDU Filtering Support for 9216 byte frames Port security on PVLANs Private VLANs Private VLAN DHCP snooping Private VLAN Promiscuous Trunk Community PVLANs ISL5-based VLAN encapsulation (excluding blocking ports on WS-X4418-GB and WS-X4412-2GB-T)6 IEEE 802.
System Requirements Table 7 Cisco IOS Software Feature Set for the Catalyst 4500 Series and E-Series Switch Multicast flooding suppression for STP changes Software routing of IPX, AppleTalk, and IPv6.
System Requirements Table 7 Cisco IOS Software Feature Set for the Catalyst 4500 Series and E-Series Switch Up to 64 active Ethernet port channels Trunk Port Security over EtherChannel Additional Protocols and Features SPAN CPU port mirroring SPAN packet-type filtering SPAN destination in-packets option SPAN ACL filtering RSPAN Enhanced VLAN statistics Netflow version 8 NetFlow Statistics Collection NetFlow Statistics Export Version 1 and Version 5 NetFlow Bridged IP Flow Secondary addressing Bootstrap
System Requirements Table 7 Cisco IOS Software Feature Set for the Catalyst 4500 Series and E-Series Switch DHCP server and relay-agent DHCP snooping DHCP client autoconfiguration DHCP Option 82 Pass Through 802.1X port-based authentication 802.1X with port security 802.1X accounting 802.1X with voice VLAN ID 802.1X private VLAN assignment 802.1X private guest VLAN 802.1X RADIUS-supplied session timeout 802.1X authentication failure VLAN 802.1X MAC Authentication Bypass 802.
System Requirements Table 7 Cisco IOS Software Feature Set for the Catalyst 4500 Series and E-Series Switch Non-stop Forwarding Awareness Non-stop Forwarding Awareness for EIGRP-stub in IP base for all supervisor engines Non-stop Forwarding with Stateful Switchover ISSU39 MAC Address Notification Combined Mode Power Resiliency SmartPort macros Forced 10/100 Auto Negotiation 802.
System Requirements 26. SCP = Secure Copy Protocol 27. GLBP = Gateway Load Balancing Protocol 28. HSRP = Hot Standby Router Protocol 29. SSH = Secure Shell Protocol 30. UDLR = Unidirectional Link Routing 31. SNMP = Simple Network Management Protocol 32. NAC = Network Admission Control 33. ACLs = Access Control Lists 34. PACL = Port Access Control List 35. QoS = Quality of Service 36. PoE = Power over Ethernet 37. RPR = Supervisor engine redundancy 38.
System Requirements – OSPFv3 – RIPng – EIGRPv6 • FAT filesystem • PIM (SM, DM, SDM) • QoS – Two Rate three Color Policing – Table map support for classification • Voltage Margining CLI • QoS for IPv6 Unsupported Features For all Supervisor Engines (II-Plus thru 6-E), the following features are not supported in Cisco IOS Release 12.
New and Changed Information • Reflexive ACLs • Routing IPv6 over an MPLS network • Two-way community VLANs in private VLANs • WCCP version 1 New and Changed Information These sections describe the new and changed information for the Catalyst 4500 series switch running Cisco IOS software: • New Hardware Features in Release 12.2(40)SG, page 23 • New Software Features in Release 12.2(40)SG, page 23 • New Hardware Features in Release 12.2(37)SG, page 24 • New Software Features in Release 12.
New and Changed Information • New Software Features in Release 12.1(8a)EW, page 37 New Hardware Features in Release 12.2(40)SG Note In addition to the classic line cards and supervisor engines, Cisco IOS Software Release 12.2(40)SG supports the next-generation high-performance E-Series Supervisor Engine 6-E with CenterFlex technology and E-Series line cards and chassis. A brief list of primary E-Series hardware supported by Cisco IOS Release 12.
New and Changed Information • Storm Control: Per-Port Multicast Suppression (“Configuring Storm Control” chapter) • Cisco Modular QoS Command-Line Interface (“Configuring QoS” chapter) • Two-Rate Three-Color Policing Only available on Supervisor Engines II-Plus thru V-10GE • Selecting Mode of Capturing Control Packets (Configuring Network Security with ACLs” chapter) • Layer 2 Control Policing (“Configuring QoS” chapter) Available on all Supervisor Engines (II-Plus thru 6-E) • Gateway Load Balan
New and Changed Information New Hardware Features in Release 12.2(31)SGA Note Cisco IOS Release 12.2(31)SGA is the first IOS release supporting the ME-X4924-10GE. Following hardware was supported: • X2-10GB-LRM New Software Features in Release 12.2(31)SGA Release 12.2(31)SGA provides the following Cisco IOS software features for the Catalyst 4500 series switch: Note The following chapter references are for the Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide.
New and Changed Information • SSO Aware HSRP (“Configuring Cisco NSF with SSO Supervisor Engine Redundancy” chapter) • Control Plane Policing (“Configuring Control Plane Policing” chapter) • WCCP version 2 Layer 2 Redirection (“Configuring WCCPv2 Services” chapter) • MAC Authentication Bypass (“Configuring 802.1X Port-Based Authentication” chapter) • 802.1X Inaccessible Authentication Bypass (“Configuring 802.1X Port-Based Authentication” chapter) • 802.
New and Changed Information • Simultaneous provisioning of X2 pluggable moduels and SFP uplinks on the Supervisor Engine II-Plus-10GE (WS-X4013+10GE). • 802.1S Standards Compliance (Refer to the Cisco IOS Release 12.3 documentation) • 802.1X Authentication Failure VLAN (“Understanding and Configuring 802.1X Port-Based Authentication” chapter) • HTTPS (Refer to the Cisco IOS Release 12.
New and Changed Information Figure 2 Cavities of X2 Transceivers on the Catalyst 4948-10GE Ca ta lys tW S- C4 94 81 0G E CO X1 N LIN MG K T X2 Ca ta lys tW S- C4 94 81 0G E CO X1 N T X2 130091 MG New Software Features in Release 12.2(25)EWA Release 12.2(25)EWA provides the following Cisco IOS software features for the Catalyst 4500 series switch: Note The following chapter references are for the Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide.
New and Changed Information • 802.1X Radius-Supplied Session Timeout (“Understanding and Configuring 802.1X Port-Based Authentication” chapter) • DHCP Option 82 Pass Through (“Configuring DHCP Snooping and IP Source Guard” chapter) New Hardware Features in Release 12.2(25)EW Note This release is deferred to 12.2(25)EWA2. Release 12.
New and Changed Information New Software Features in Release 12.2(20)EWA Release 12.2(20)EWA provides the following Cisco IOS software features for the Catalyst 4500 series switch: Note The following chapter references are for the Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide. • Non-Stop Forwarding Awareness (“Configuring Supervisor Engine Redundancy Using RPR and SSO” chapter) • Stateful Switchover (“Configuring Supervisor Engine Redundancy Using RPR and SSO” chapter) • 802.
New and Changed Information New Hardware Features in Release 12.2(18)EW Release 12.
New and Changed Information New Software Features in Release 12.1(20)EW Release 12.1(20)EW provides the following Cisco IOS features for the Catalyst 4500 series switch: Note The following chapter references are for the Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide.
New and Changed Information New Software Features in Release 12.1(19)EW Release 12.1(19)EW provides the following Cisco IOS software features for the Catalyst 4500 series switch: Note Note The following chapter references are for the Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide.
New and Changed Information • Catalyst 4500 Series Switch Cisco IOS Command Reference at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_19/command/index.htm New Hardware Features in Release 12.1(13)EW Release 12.
New and Changed Information For more information on these features, refer to these publications: • Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_13/config/index.htm • Catalyst 4500 Series Switch Cisco IOS Command Reference at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_13/command/index.htm New Hardware Features in Release 12.1(12c)EW Release 12.
New and Changed Information – Spanning-tree Loop guard and PortFast BPDU Filtering (refer to the “Configuring STP Features” chapter) – 802.1s and 802.1w (refer to the “Understanding and Configuring Multiple Spanning Trees” chapter) – IGMP filtering on trunks – PVLAN isolated trunk port (refer to the “Configuring PVLANs” chapter) – DHCP snooping (refer to the “Understanding and Configuring DHCP Snooping" chapter) – 802.1X port-based authentication (refer to the "Configuring 802.
New and Changed Information – Command Reference for the Catalyst 4006 Switch with Supervisor Engine III at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_1_11/command/index.htm Release 12.1(11b)EW provides these features: • Multiple VLAN access port (only for data and voice VLANs) • Inline power management for Cisco IP phones and Aironet 350 Wireless Access Points on the WS-X4148-RJ45V module.
New and Changed Information – Command Reference for the Catalyst 4006 Switch with Supervisor Engine III at the following URL: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_18a/command/index.htm Release 12.1(8a)EW provides these features: • The Layer 2 features are as follows: Note The following chapter references are for the Software Configuration Guide for the Catalyst 4006 Switch with Supervisor Engine III.
Upgrading the System Software • Multiple-Hot Standby Routing Protocol (M-HSRP; refer to “Hot Standby Router Protocol” in the Cisco IOS Network Protocols Configuration Guide, Part 1, and the Cisco IOS Network Protocols Command Reference, Part 1) • Access control using several supported authentication methods (refer to the “Configuring the Switch for the First Time” chapter) • Switched Port Analyzer (SPAN); (refer to the “Understanding and Configuring SPAN” chapter) • Quality of Service (QoS); (refer
Upgrading the System Software Table 9 Supervisor Engine and Recommended ROMMON Release Supervisor Engine Minimum ROMMON Release Recommended ROMMON Release V-10GE 12.2(25r)EW 12.2(31r)SGA1 ME-X4924-10GE 12.2(25)EW 12.2(31r)SGA1 Table 10 ROMMON Release and Promupgrade Programs ROMMON Release Promupgrade Program 12.1(11br)EW cat4000-sup3-promupgrade-121_11br_EW 12.1(12r)EW cat4000-sup3-promupgrade-121_12r_ew 12.1(19r)EW cat4000-ios-promupgrade-121_19r_EW 12.
Upgrading the System Software Note The examples in this section use the programmable read-only memory (PROM) upgrade version 12.1(20r)EW1 and Cisco IOS Release 12.1(20)EW1. For other releases, replace the ROMMON release and Cisco IOS software release with the appropriate releases and filenames. Follow this procedure to upgrade your supervisor engine ROMMON: Step 1 Note Step 2 Directly connect a serial cable to the console port of the supervisor engine.
Upgrading the System Software ********************************************************** Rom Monitor Program Version 12.1(12r)EW . .(output truncated) . Established physical link 100MB Half Duplex Network layer connectivity may take a few seconds rommon 1 > Step 6 Caution Run the PROM upgrade program by entering this command: boot bootflash:cat4000-ios-promupgrade-121_20r_EW1 No intervention is necessary to complete the upgrade. To ensure a successful upgrade, do not interrupt the upgrade process.
Upgrading the System Software The following example shows how to delete the cat4000-ios-promupgrade-121_20r_EW1 image from bootflash and reclaim unused space: Switch# delete bootflash:cat4000-ios-promupgrade-121_20r_EW1 Switch# squeeze bootflash: All deleted files will be removed, proceed (y/n) [n]? y Squeeze operation may take some time, proceed (y/n) [n]? y Switch# Step 9 Use the show version command to verify that the ROMMON has been upgraded Switch#show version Cisco Internetwork Operating System Sof
Upgrading the System Software Follow this procedure to upgrade your supervisor engine ROMMON to Release 12.1(20r)EW1. This procedure can be used when console access is not available and when the ROMMON upgrade must be performed remotely. Note Step 1 Note Step 2 In the following section, use the PROM upgrade version cat4000-ios-promupgrade-121_20r_EW1. Establish a Telnet session to the supervisor engine.
Upgrading the System Software ROMMON. When the upgrade is complete the supervisor engine will autoboot, and the second BOOT variable command will load the Cisco IOS software image specified by the second BOOT command. Note The config-register must be set to autoboot. In this example, we assume that the console port baud rate is set to 9600 bps and that the config-register is set to 0x0102. Use the config-register command to autoboot using image(s) specified by the BOOT variable.
Upgrading the System Software * * * Welcome to Rom Monitor for WS-X4515 System. * * Copyright (c) 2002 by Cisco Systems, Inc. * * All rights reserved. * * * ********************************************************** Rom Monitor Program Version 12.1(12r)EW Board type 2, Board revision 7 Swamp FPGA revision 28, Dagobah FPGA revision 86 ***** The system will autoboot in 5 seconds ***** Type control-C to prevent autobooting. . . . . .
Upgrading the System Software config-register = 0x0102 Autobooting using BOOT variable specified file..... Current BOOT file is --- bootflash:cat4000-i9s-mz.121-20.EW1 Rommon reg: 0x56000380 Running IOS...
Upgrading the System Software Switch# delete bootflash:cat4000-ios-promupgrade-121_20r_EW1 Switch# squeeze bootflash: All deleted files will be removed, proceed (y/n) [n]? y Squeeze operation may take some time, proceed (y/n) [n]? y Switch# Step 11 Use the show bootvar command to verify that the ROMMON upgrade program has been removed from the BOOT variable. Switch#sh bootvar BOOT variable = bootflash:cat4000-i9s-mz.121-20.
Upgrading the System Software Step 3 Download the software image into Flash memory using the copy tftp command. The following example shows how to download the Cisco IOS software image cat4000-is-mz.121-12c.EW from the remote host 172.20.58.78 to bootflash: Switch# copy tftp: bootflash: Address or name of remote host [172.20.58.78]? Source filename [cat4000-is-mz121_12c.EW]? Destination filename [cat4000-is-mz.121-12c.EW]? Accessing tftp://172.20.58.78/cat4000-is-mz.121-12c.EW... Loading cat4000-is-mz.
Upgrading the System Software Step 6 Use the config-register command to set the configuration register to 0x2102. The following example show how to set the second least significant bit in the configuration register: Switch# configure terminal Switch(config)# config-register 0x2102 Switch(config)# exit Switch# write Building configuration... Compressed configuration from 3723 to 1312 bytes [OK] Switch# Step 7 Caution Enter the reload command to reset the switch and load the software.
Limitations and Restrictions ********************************************************** * * * Welcome to Rom Monitor for WS-X4014 System. * * Copyright (c) 2002 by Cisco Systems, Inc. * * All rights reserved. * * * ********************************************************** Rom Monitor Program Version 12.1(12r)EW Board type 1, Board revision 5 Swamp FPGA revision 16, Dagobah FPGA revision 47 MAC Address IP Address Netmask Gateway TftpServer Main Memory : : : : : : 00-30-85-XX-XX-XX 10.10.10.91 255.255.
Limitations and Restrictions – NLSP – Jumbo Frames • For AppleTalk software routing, the following are not supported: – AURP – AppleTalk Control Protocol for PPP – Jumbo Frames – EIGRP • For NFL, the following are not supported: – The following packets are not accounted for by the NetFlow Services card: Control packets Packets with link-level errors ARP, RARP – Software flow cache size is fixed – Distribution not based on IP packet size • For PBR, the following are not supported: – Matching cannot be
Limitations and Restrictions • Catalyst 4500 supervisor engines will not be properly initialized if the VLAN configuration in the startup file does not match the information stored in the VLAN database file. This situation might occur if a backup configuration file was used. • A Layer 2 LACP channel cannot be configured with the spanning tree PortFast feature. • Netbooting using a boot loader image is not supported. See the “Troubleshooting” section on page 285 for details on alternatives.
Limitations and Restrictions • Only ports 1 and 2 on the WS-X4418-GB and ports 13 and 14 on the WS-X4412-2GB-T module can be set as ISL trunks. • The Fast Ethernet port (10/100) on the supervisor module is active in ROMMON mode only. • If an original packet is dropped due to transmit queue shaping and/or sharing configurations, a SPAN packet copy can still be transmitted on the SPAN port. • For all software releases, do not use over 100,000 routes.
Limitations and Restrictions • Support for PoE depends on the use of line cards and power supplies that support PoE. PoE switching modules – WS-X4148-RJ45V – WS-X4224-RJ45V – WS-X4248-RJ45V – WS-X4248-RJ21V – WS-X4524-GB-RJ45V – WS-X4548-GB-RJ45V PoE enabled power supplies – 1300 W AC – 1400 W DC – 2800 W AC • While configuring PVLAN promiscuous trunk ports, the maximum number of mappings is 500 primary VLANs to 500 secondary VLANs. • 802.
Limitations and Restrictions • IPSG for Static Hosts basically supports the same port mode as IPSG except that it does not support trunk port: – It supports Layer 2 access port and PVLAN host port (isolated or community port). – It does not support trunk port, Layer 3 port or EtherChannel. • IPSG for Static Hosts should not be used on uplink ports. • Selective DBL is only supported for non-tagged or single-tagged IP packets.
Limitations and Restrictions As a workaround do the following: 1. Back-up your configuration when performing software downgrading. 2. Remove all CPP entries manually from the config and then re-appy the macro global apply system-cpp command. There should be no problem associated with this caveat while upgrading between releases (CSCsh45714). • Certain configurations on the Cat4507R and Cat4510R chassis exceeds the maximum amount of data power available.
Limitations and Restrictions Switch(config-if)# ip verify source tracking [port-security] ****activate IPSG on port Caution Note If you only configure the ip verify source tracking [port-security] interface configuration command on a port without enabling IP device tracking globally or setting an IP device tracking maximum on that interface, IPSG with Static Hosts will reject all the IP traffic from that interface. The issue above also applies to IPSG with Static Hosts on a PVLAN Host port.
Limitations and Restrictions message indicating that interface GE1/1 is no longer present. This behavior is correct. When the formerly active supervisor engine is reinserted in slot 1, there is no configuration for interface Gig 1/1. This situation will not occur when both supervisor engines are physically in the chassis.
Limitations and Restrictions – Supervisor Engine 6-E uses the FAT file system for compact flash (slot0). If a compact flash is not formatted in FAT file system (such as compact flash on a supervisor engine other than 6-E), the switch does not recognize it. • The Fast Ethernet port (10/100) on the supervisor module is active in ROMMON mode only. • If an original packet is dropped due to transmit queue shaping and/or sharing configurations, a SPAN packet copy can still be transmitted on the SPAN port.
Limitations and Restrictions 00:02:57: %RADIUS-4-RADIUS_DEAD: RADIUS server 172.20.246.206:1645,1646 is not responding. If this message appears, check that there is network connectivity between the switch and the ACS. You should also check that the switch has been properly configured as an AAA client on the ACS.
Caveats • IPv6 ACL is not supported on a switchport. IPv6 packets cannot be filtered on switchports using any of the known methods (PACL, VACL, or MACLs). • Class-map match statements using match ip prec | dscp match only IPv4 packets whereas matches performed with match prec | dscp match both IPv4 and IPv6 packets. • IPv6 QoS hardware switching is disabled if the policy-map contains IPv6 ACL and match cos in the same class-map with the ipv6 access-list has any mask range between /81 and /127.
Caveats Open Caveats in Cisco IOS Release 12.2(40)SG This section lists the open caveats in Cisco IOS Release 12.2(40)SG: • When you enter the access-list N permit host hostname command on a redundant chassis operating in SSO mode, you might observe the following syslog messages. The command is not synchronized with the redundant supervisor engine, and keepalive warnings appear.
Caveats • When you issue the ip http secure-server command (or if the system reads it from the startup configuration), the device will check for the existence of a persistent self-signed certificate during boot up. – If such a certificate does not exist and the device's hostname and default_domain have been set, then a persistent self-signed certificate will be generated. – If such a certificate exists, the FQDN in the certificate is compared with the current device's hostname and default_domain.
Caveats – This is also seen if the switch administrator issues the shutdown and no shutdown commands on an outgoing interface that has IP unnumbered enabled. The switch receives packets that require redirection and the destination MAC address is already in ARP table. Workarounds: – Do not inject packets that require IP redirect sent out to an IP unnumbered port within 3 minutes of booting the Catalyst 4500 series switch. – Configure the correct default gateway on the host side.
Caveats Workaround: None. This is an informational message. (CSCsi60898) • If you attempt to downgrade to Cisco IOS Release 12.2(37)SG from Release 12.2(37)SG1 and if the process is started with active supervisor engine in slot-2, the downgrade fails at ‘runversion.’ Workaround: None. (CSCsj83688) • If an Cisco IP Phone has an supplicant attached, upon reloading a DUT port configured with MDA and attached to phones and supplicants, the port will not pass traffic. Phone will in an unknown state.
Caveats • When policer or shape or shape values are specified in terms of percentage of link bandwidth on a policy and the interface on which it is attached is forced to a specific speed with the speed 10/100/1000 command, the applied policer or shape or shape value might correspond to the new forced speed. Service policy has to be configured with percentage police or shape or share values and the link speed is forced to a specific values.
Caveats • When an E-series switch encounters either a fan tray failure or a supervisor critical temperature, the chassis shuts off. The output of the show crashdump command will not indicate the cause of the power-down. Workarounds: Use the show log command to determine the cause of the power-down. – If the log has LogGalInsufficientFansDetected messages, the cause was a fan-tray failure.
Caveats • When a non-default duplex setting is applied to a FastEthernet interface and you upgrade from Cisco IOS Release 12.2(31)SGA to 12.2(40)SG, the duplex settings on FastEthernet settings are lost. The interface reverts to its default duplex setting, and the duplex setting no longer appears in the output of the show running command. Workaround: If non-default duplex settings are in the running config, note them prior to upgrading, and reapply them after the upgrade completes.
Caveats Currently, if auto-QoS is applied to a port that is already a member of a portchannel, the application is rejected with an error message. However, the reverse is not true. If auto-QoS is applied first and then the port joins a portchannel, the command is accepted.
Caveats Workaround: None. (CSCsl06731) • Applying a policy to a VLAN that has been allocated to a routed port causes the internal VLAN to be policed. Workaround: Avoid creating a VLAN that has been allocated internally to a routed port. (CSCsh60244) • If exceed burst is not explicitly configured for a dual rate policer, the show policy-map command displays “0” as the burst value. Workaround: Enter the show policy-map interface command.
Caveats – Set a longer ssh timout. (CSCsc94317) • When dot1x (radius assigned vlan), port security and voice VLAN is enabled on the port with phone and PC connected to it and PC get authenticated in radius assigned VLAN, on switchover, first packet come from PC will trigger the security violation. Workaround: Issue shut/no shut on the port to authorize the PC correctly.
Caveats Workaround: When using the access-list N permit host hostname command, specify the IP address of the host rather than the hostname (CSCef67489) • In rare instances, when you are using MAC ACL-based policers, the packet match counters in show policy-map interface fa6/1 do not show the packets being matched: clearwater#sh policy-map int FastEthernet3/2 Service-policy output: p1 Class-map: c1 (match-all) 0 packets<--------It stays at '0' despite of traffic being received Match: access-group name fnac
Caveats QueueID Old QueueName New QueueName 7 adj-same-if control-packet 8 control-packet 11 adj-same-if 13 acl input log rfp-failure 14 acl input forward acl input log Workaround: After upgrading to 12.2(31)SG and later releases, remove the old SPAN source configuration and reconfigure with the new queue names/IDs.
Caveats Workarounds: Issue the no bgp dampening command, then the bgp dampening command. (CSCse12485) • When policing IEEE 802.1Q tagged non-IP traffic and calculating traffic conformance, the policer excludes the four bytes that constitute the 802.1Q tag even when you configure qos account layer2 encapsulation. Workaround: None. (CSCsg58526) • In rare instances, the Supervisor Engine V-10GE might reload with the crashdump vector 0x00000100.
Caveats %XDR-6-XDRINVALIDHDR: XDR for client (CEF push) dropped (slots:2 from slot:3 context:145 length:11) due to: invalid context Workaround: None. This is an informational message. (CSCsi60898) • If you attempt to downgrade to Cisco IOS Release 12.2(37)SG from Release 12.2(37)SG1 and if the process is started with active supervisor engine in slot-2, the downgrade fails at ‘runversion.’ Workaround: None. (CSCsj83688) • If you attempts to upgrade to Cisco IOS Release 12.2(37)SG1 from the Release 12.
Caveats Cisco has made free software available to address these vulnerabilities for affected customers. Fixed Cisco IOS software listed in the Software Versions and Fixes section contains fixes for all vulnerabilities mentioned in this advisory. There are no workarounds available to mitigate the effects of any of the vulnerabilities apart from disabling the protocol or feature itself. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-voice.
Caveats NHRP is a primary component of the Dynamic Multipoint Virtual Private Network (DMVPN) feature. NHRP can operate in three ways: at the link layer (Layer 2), over Generic Routing Encapsulation (GRE) and multipoint GRE (mGRE) tunnels and directly on IP (IP protocol number 54). This vulnerability affects all three methods of operation. NHRP is not enabled by default for Cisco IOS. This vulnerability is addressed by Cisco bug IDs CSCin95836 for non-12.2 mainline releases and CSCsi23231 for 12.
Caveats (CSCef01798) • After an SSO switchover, you may receive a “PM-4-PORT_INCONSISTENT” error message on the switch console if you enter the shutdown command, then the no shutdown command on the port that is in UDLD error-disable state. This does not impact the switch; the port remains in UDLD error-disable state. Re-entering the shutdown command, then the no shutdown command on the same port will ensure that the error message does not re-appear. Workaround: None.
Caveats Workarounds: – Use a different copy protocol. – Set a longer ssh timout. (CSCsc94317) • To enable IP CEF if it is disabled by hardware exhaustion, use the ip cef distributed command. Workaround: None. (CSCsc11726) • An IP redirect may not be sent out if the outgoing interface on a Catalyst 4500 series switch is an IP unnumbered port.
Caveats • If the ACL of an SVI interface is too large for the TCAM, ARP replies for the associated VLAN may not be processed. Workaround: Upgrade to Cisco IOS Release 12.2(31)SG or later and resize the TCAM with the access-list hardware region balance command to support the ACL Verify TCAM utilization with the show platform hardware acl statistics utilization brief command.
Caveats Workaround: If the SVIs associated with the physical interface are down after the switchover, issue shutdown and no shutdown commands on the physical interface to bring up the SVIs. (CSCsb02308) • A bulk sync failure upon issuing the switchport trunk encapsulation dot1q command causes the standby supervisor engine to reload. Workaround:When this happens, the mismatched command list can be displayed on the active supervisor engine by issuing the show issu config-sync failures mcl command.
Caveats Successful repeated exploitation of any of these vulnerabilities may lead to a sustained Denial-of-Service (DoS); however, vulnerabilities are not known to compromise either the confidentiality or integrity of the data or the device. These vulnerabilities are not believed to allow an attacker will not be able to decrypt any previously encrypted information.
Caveats A combined software table for Cisco IOS is available to aid customers in choosing a software releases that fixes all security vulnerabilities published as of May 22, 2007. This software table is available at the following link: http://www.cisco.com/warp/public/707/cisco-sa-20070522-cry-bundle.shtml. (CSCsb40304) • Cisco IOS device may crash while processing malformed Secure Sockets Layer (SSL) packets.
Caveats – Cisco Firewall Service Module (FWSM) This vulnerability is also being tracked by CERT/CC as VU#754281. Cisco has made free software available to address this vulnerability for affected customers. There are no workarounds available to mitigate the effects of the vulnerability. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20070522-crypto.shtml. Note Another related advisory is posted together with this Advisory.
Caveats Class-map: c1 (match-all) 0 packets<--------It stays at '0' despite of traffic being received Match: access-group name fnacl21 police: Per-interface Conform: 9426560 bytes Exceed: 16573440 bytes Workaround: Verify that the MAC addresses being transmitted through the system are learned.
Caveats QueueID Old QueueName New QueueName 11 adj-same-if 13 acl input log rfp-failure 14 acl input forward acl input log Workaround: After upgrading to 12.2(31)SG and later releases, remove the old SPAN source configuration and reconfigure with the new queue names/IDs.
Caveats • Configure a LACP channel in 802.1q tunnel mode between a Catalyst 4500 series switch and a Catalyst 6000 series switch, and apply the redundancy reload shelf command on the Catalyst 4500 series switch. This can cause link flaps on the EtherChannel interface when the Catalyst 4500 switch reloads. This happens to redundant Catalyst 4500 system, regardless the number of supervisor engines on the chassis. This problem applies to Cisco IOS Releases 12.2(31)SG and the 12.2(31)SGA maintenance train.
Caveats Workaround: None. (CSCse43697) • After configuring the bgp dampening route-map bgp_damp command on an active supervisor engine in SSO mode, the following system logs are seen on the console of the standby supervisor engine: 00:10:34: %BGP-5-DAMPENING_HIGH_MAX_PENALTY: Maximum penalty (32473) is more than allowed maximum (20000). Dampening is OFF 00:10:06: %BGP-5-DAMPENING_HIGH_MAX_PENALTY: Maximum penalty (32473) is more than allowed maximum 000).
Caveats Workaround: Instead of using ip summary-address rip 0.0.0.0 0.0.0.0 to only send out the default, configure a distribute-list under the rip process. (CSCsd68016) • A Catalyst 4500 supervisor engine may crash when configuring ip flow-aggregation cache. This caveats impacts the following supervisor engines: – WS-X4516-10GE – WS-X4516 with the Netflow daughter card WS-F4531 – WS-X4515 with the Netflow daughter card WS-F4531 This problem exists in the Cisco IOS Releases 12.2(25)EWAx, 12.
Caveats Workaround: Verify that the MAC addresses being transmitted through the system are learned. (CSCef01798) • After an SSO switchover, you may receive a “PM-4-PORT_INCONSISTENT” error message on the switch console if you enter the shutdown command, then the no shutdown command on the port that is in UDLD error-disable state. This does not impact the switch; the port remains in UDLD error-disable state.
Caveats Workaround: After upgrading to 12.2(31)SG and later releases, remove the old SPAN source configuration and reconfigure with the new queue names/IDs. For example: Switch(config)# no monitor session n source cpu queue all rx Switch(config)# monitor session n source cpu queue (CSCsc94802) • If you initiate an scp copy from the console and it is delayed long enough to cause a timeout, the console is disconnected. Workarounds: – Use a different copy protocol.
Caveats This problem only occurs if the interface configured with port security is in violation restrict mode (through the switchport port-security violation restrict command). Moreover, the interface must be in security violation state when you apply the default interface command. Workarounds: Bring the interface into shutdown mode before you apply the default interface command. (CSCsf30157) • After an ISSU is performed on a WS-X4448-GB-SFP linecard running Cisco IOS Release 12.
Caveats Workaround: Remove all configurations that require the loopback interface before removing the loopback interface. (CSCsf06946) Resolved Caveats in Cisco IOS Release 12.2(31)SGA4 This section lists the resolved caveats in Release 12.2(31)SGA4: • For Cisco IOS Releases 12.2(25)EWA10, 12.2(31)SGA2 and 12.2(31)SGA3, PoE Health Monitoring Diagnostic software introduced via CSCsf26804 incorrectly reports PoE errors for module WS-X4548-GB-RJ45V, hardware revision 4.0.
Caveats Link ID 192.168.22.2 ADV Router 192.168.22.6 Age 3391732 Seq# Checksum 0x80000CCE 0x0053CD Additionally, CPU load for OSPF process might increase. Workaround: Avoid conflicting IP addresses. Remove duplicate IP address or shutdown the interface. (CSCsi11438) • Lock & Key on a Catalyst 4948 switch running Cisco IOS Release 12.2(31)SGA1 does not work properly. When you open up the ACL with the access-enable host command, the ACL is correctly updated with an entry for the host.
Caveats 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:23:36.721 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: Unable to sync command to standby 01:23:46.777 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: Unable to sync command to standby 01:23:56.
Caveats • After upgrading to Cisco IOS 12.2(31)SG and later releases, some CPU queues configured as SPAN sources and saved in the startup configuration file do not function as they did in the older software release. This only impacts a switch that has any of the following queues are configured as SPAN source in releases prior to 12.2(31)SG and saved to startup-config. The SPAN destination would not get the same traffic after upgrading to 12.2(31)SG.
Caveats – A packet requires an IP redirect to an IP unnumbered outgoing port within 3 minutes of booting the Catalyst 4500 series switch. – This is also seen if the switch administrator issues the shutdown and no shutdown commands on an outgoing interface that has IP unnumbered enabled. The switch receives packets that require redirection and the destination MAC address is already in ARP table.
Caveats • Configure a LACP channel in 802.1q tunnel mode between a Catalyst 4500 series switch and a Catalyst 6000 series switch, and apply the redundancy reload shelf command on the Catalyst 4500 series switch. This can cause link flaps on the EtherChannel interface when the Catalyst 4500 switch reloads. This happens to redundant Catalyst 4500 system, regardless the number of supervisor engines on the chassis. This problem applies to Cisco IOS Releases 12.2(31)SG and the 12.2(31)SGA maintenance train.
Caveats Workaround: Remove all configurations that require the loopback interface before removing the loopback interface. (CSCsf06946) • The RADIUS attribute 32 is not being sent to the RADIUS server for Cisco IOS Release 12.2(31)SG and beyond. Workaround: Downgrade to Cisco IOS Release 12.2(25)EWA10, if feasible. (CSCsi22041) Resolved Caveats in Cisco IOS Release 12.2(31)SGA3 This section lists the resolved caveats in Release 12.
Caveats 000102: Jul 9 config-changed 000103: Jul 9 config-changed 000104: Jul 9 config-changed 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:23:06.598 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:16.642 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:26.682 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:36.721 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:46.
Caveats On a switch that support redundancy, the generation of the self-signed certificate is performed independently on the active and the standby supervisor engines. So, the certificates differ. After switchover, the HTTP client that holds the old certificate can not connect to the HTTPS server. Workaround: Re-connect. (CSCsb11964) • After upgrading to Cisco IOS 12.
Caveats removed in the running configuration on the active supervisor engine for the above interfaces. The standby supervisor engine will now boot up into SSO mode. Save the configuration on the active supervisor engine after making the above changes. (CSCse86228) • An IP redirect may not be sent out if the outgoing interface on a Catalyst 4500 series switch is an IP unnumbered port.
Caveats removing the switchport trunk encapsulation dot1q subinterface command from each of the interfaces associated with the WS-X4418-GB module on the active supervisor engine and then rebooting the standby supervisor engine. Please verify that the above encapsulation command is removed in the running configuration on the active supervisor engine for the above interfaces. The standby supervisor engine will now boot up into SSO mode.
Caveats Workaround: Remove the transceiver from the new port and place it in the old port. Once the SFP is recognized in the old port, remove it slowly and insert it in the new port. (CSCse34693). • If the switch administrator unconfigures a loopback interface that is required by another configured protocol (i.e., BGP) on the primary supervisor engine, the standby supervisor engine will not reload successfully.
Caveats • On PoE line cards connected to IP phones or other PoE networking devices, you might see a S2W console warning message indicating that the POE devices are either not responding to polling from the supervisor or the devices are in an an error state. When this situation exists, PoE service may not work correctly. For instance, phones will not have power or power will be removed intermittently from some ports.
Caveats This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20070808-scp.shtml. (CSCsc19259) Open Caveats in Cisco IOS Release 12.2(31)SGA1 This section lists the open caveats in Cisco IOS Release 12.2(31)SGA1: • When you enter the access-list N permit host hostname command on a redundant chassis operating in SSO mode, you might observe the following syslog messages. The command is not synchronized with the redundant supervisor engine, and keepalive warnings appear.
Caveats • Occasionally, on redundant systems in SSO mode, applying the apply cisco-phone $AVID vlan $VVID vlan macro command to an interface connected to an IP phone may render the interface in the wrong state relative to the standby supervisor engine. This causes the SVI to be “down” after the switchover. Workaround: If the SVIs associated with the physical interface are down after the switchover, issue shutdown and no shutdown commands on the physical interface to bring up the SVIs.
Caveats – Use a different copy protocol. – Set a longer ssh timout. (CSCsc94317) • Occasionally, on redundant systems in SSO mode, applying the apply cisco-phone $AVID vlan $VVID vlan macro command to an interface connected to an IP phone may render the interface in the wrong state relative to the standby supervisor engine. This causes the SVI to be “down” after the switchover.
Caveats Workarounds: Issue the no bgp dampening command, then the bgp dampening command. (CSCse12485) • On redundant systems working in SSO mode, a line-by-line (LBL) configuration sync error occurs between the active and standby supervisor engines when the administrator defaults the configuration for an interface configured with port security. The error causes the standby supervisor engine to reset if the config sync policy for the LBL errors is enforced using the issu config-sync policy lbl prc command.
Caveats • When the same MAC addresses are learned and aged out on different VLANs, the Cat4k Mgmt LoPri process will cause CPU utilization to increase. This does not impact local data switching performance because the LoPri process is of low priority with limited access to the CPU. Workaround: None.
Caveats • The Catalyst 4500 switch running 12.2(31)SG and configured for 802.
Caveats Workaround: Remove the configuration lines reported in the MCL list from the running config on the active supervisor engine, and then rebooting the standby engine. Once the standby supervisor engine is up and the switch reaches the STANDBY HOT state, reconfigure the original power inline static max command. (CSCse57813) • When you remove the radius-server source-ports 1645-1646 default command, the switch sends the RADIUS requests with the wrong source port, causing failed authentication attempts.
Caveats Note CoPP is only available on certain platforms and IOS release trains. Additional information on the configuration and use of the CoPP feature can be found at the following URL: http://www.cisco.com/en/US/products/sw/iosswrel/ps1838/products_white_paper09186a00802 11f39.shtml 3.
Caveats Workaround: Reset the VTP domain name for all switches in the domain. (CSCse40078) • While upgrading the Catalyst 4500 series switch with ISSU, issuing the issu runversion command as the standby supervisor engine boots causes the active supervisor engine to report a bulk sync failure due to a mismatch command (MCL). The MCL errors are reported only for PoE interfaces on WS-X4506-GB-T line cards configured for inline power with the power inline static max command.
Caveats This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20070522-crypto.shtml. Note Another related advisory is posted together with this Advisory. It also describes vulnerabilities related to cryptography that affect Cisco IOS. A combined software table for Cisco IOS only is available at http://www.cisco.com/warp/public/707/cisco-sa-20070522-cry-bundle.shtml and can be used to choose a software release which fixes all security vulnerabilities published as of May 22, 2007.
Caveats • After an SSO switchover, you may receive a “PM-4-PORT_INCONSISTENT” error message on the switch console if you enter the shutdown command, then the no shutdown command on the port that is in UDLD error-disable state. This does not impact the switch; the port remains in UDLD error-disable state. Re-entering the shutdown command, then the no shutdown command on the same port will ensure that the error message does not re-appear. Workaround: None.
Caveats QueueID Old QueueName New QueueName 11 adj-same-if 13 acl input log rfp-failure 14 acl input forward acl input log Workaround: After upgrading to 12.2(31)SG and later releases, remove the old SPAN source configuration and reconfigure with the new queue names/IDs.
Caveats • An IP redirect may not be sent out if the outgoing interface on a Catalyst 4500 series switch is an IP unnumbered port. This could occur for these reasons: – A packet requires an IP redirect to an IP unnumbered outgoing port within 3 minutes of booting the Catalyst 4500 series switch. – This is also seen if the switch administrator issues the shutdown and no shutdown commands on an outgoing interface that has IP unnumbered enabled.
Caveats Workarounds: None. (CSCse43697) • The RADIUS attribute 32 is not being sent to the RADIUS server for Cisco IOS Release 12.2(31)SG and beyond. Workaround: Downgrade to Cisco IOS Release 12.2(25)EWA10, if feasible. (CSCsi22041) Resolved Caveats in Cisco IOS Release 12.2(31)SGA This section lists the resolved caveats in Release 12.2(31)SGA: • When running Cisco IOS Release 12.
Caveats (CSCek26492) • The Cisco IOS Transmission Control Protocol (TCP) listener in certain versions of Cisco IOS software is vulnerable to a remotely-exploitable memory leak that may lead to a denial of service condition. This vulnerability only applies to traffic destined to the Cisco IOS device. Traffic transiting the Cisco IOS device will not trigger this vulnerability. Cisco has made free software available to address this vulnerability for affected customers.
Caveats 000103: Jul 9 config-changed 000104: Jul 9 config-changed 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:23:16.642 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:26.682 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:36.721 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:46.777 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:56.
Caveats On a switch that support redundancy, the generation of the self-signed certificate is performed independently on the active and the standby supervisor engines. So, the certificates differ. After switchover, the HTTP client that holds the old certificate can not connect to the HTTPS server. Workaround: Re-connect.
Caveats • Occasionally, on redundant systems in SSO mode, applying the apply cisco-phone $AVID vlan $VVID vlan macro command to an interface connected to an IP phone may render the interface in the wrong state relative to the standby supervisor engine. This causes the SVI to be “down” after the switchover. Workaround: If the SVIs associated with the physical interface are down after the switchover, issue shutdown and no shutdown commands on the physical interface to bring up the SVIs.
Caveats 000101: Jul 9 config-changed 000102: Jul 9 config-changed 000103: Jul 9 config-changed 000104: Jul 9 config-changed 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:22:56.566 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:06.598 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:16.642 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:26.682 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:36.
Caveats • When you issue the ip http secure-server command (or if the system reads it from the startup configuration), the device will check for the existence of a persistent self-signed certificate during boot up. – If such a certificate does not exist and the device's hostname and default_domain have been set, then a persistent self-signed certificate will be generated. – If such a certificate exists, the FQDN in the certificate is compared with the current device's hostname and default_domain.
Caveats • If you initiate a scp copy from the console and it is delayed long enough to cause a timeout, the console is disconnected. Workarounds: – Use a different copy protocol. – Set a longer ssh timout. (CSCsc94317) • Occasionally, on redundant systems in SSO mode, applying the apply cisco-phone $AVID vlan $VVID vlan macro command to an interface connected to an IP phone may render the interface in the wrong state relative to the standby supervisor engine.
Caveats (CSCin95836) Open Caveats in Cisco IOS Release 12.2(31)SG1 This section lists the open caveats in Cisco IOS Release 12.2(31)SG1: • When you enter the access-list N permit host hostname command on a redundant chassis operating in SSO mode, you might observe the following syslog messages. The command is not synchronized with the redundant supervisor engine, and keepalive warnings appear.
Caveats • Occasionally, on redundant systems in SSO mode, applying the apply cisco-phone $AVID vlan $VVID vlan macro command to an interface connected to an IP phone may render the interface in the wrong state relative to the standby supervisor engine. This causes the SVI to be “down” after the switchover. Workaround: If the SVIs associated with the physical interface are down after the switchover, issue shutdown and no shutdown commands on the physical interface to bring up the SVIs.
Caveats Workaround: After upgrading to 12.2(31)SG and later releases, remove the old SPAN source configuration and reconfigure with the new queue names/IDs. For example: Switch(config)# no monitor session n source cpu queue all rx Switch(config)# monitor session n source cpu queue (CSCsc94802) • If you initiate a scp copy from the console and it is delayed long enough to cause a timeout, the console is disconnected. Workarounds: – Use a different copy protocol. – Set a longer ssh timout.
Caveats It only happens on releases that include the fix for CSCse85200. When turning on "debug cdp even," the following message appears: CDP-EV: Received item (type : 9) with invalid length 4 Workaround: None. (CSCsf07847) Open Caveats in Cisco IOS Release 12.2(31)SG This section lists the open caveats in Cisco IOS Release 12.2(31)SG: • When you enter the access-list N permit host hostname command on a redundant chassis operating in SSO mode, you might observe the following syslog messages.
Caveats Workaround: None. (CSCeg48586) • Occasionally, on redundant systems in SSO mode, applying the apply cisco-phone $AVID vlan $VVID vlan macro command to an interface connected to an IP phone may render the interface in the wrong state relative to the standby supervisor engine. This causes the SVI to be “down” after the switchover.
Caveats QueueID Old QueueName New QueueName 13 acl input log rfp-failure 14 acl input forward acl input log Workaround: After upgrading to 12.2(31)SG and later releases, remove the old SPAN source configuration and reconfigure with the new queue names/IDs.
Caveats This caveat is fixed in 12.2(25)EWA11 and 12.2(31)SGA4 software releases. Release 12.2(37)SG is other recommended software release. 12.2(37)SG does not have the fix for CSCsf26804 and hence does not run into CSCsk85158. A linecard replacement is not needed. Do not RMA the module. (CSCsk85158) Resolved Caveats in Cisco IOS Release 12.2(31)SG This section lists the resolved caveats in Release 12.
Caveats Further Information: On the 13th September 2006, Phenoelit Group posted an advisory containing three vulnerabilities: – VTP Version field DoS – Integer Wrap in VTP revision – Buffer Overflow in VTP VLAN name These vulnerabilities are addressed by Cisco IDs: – CSCsd52629/CSCsd34759—VTP version field DoS – CSCse40078/CSCse47765—Integer Wrap in VTP revision – CSCsd34855/CSCei54611—Buffer Overflow in VTP VLAN name Cisco’s statement and further information are available on the Cisco public website at
Caveats disconnected. If a WS-X4148-FE-BD-LC port is connected to a converter box in SML mode, and the Ethernet cable on the box is removed, the port will eventually go into errdisable mode because of the continuous connecting and disconnecting (flapping) of the link. Workaround: Configure the convertor box (CPE device) to operate in either LT (Link Test) or ML (Missing Link) mode.
Caveats Class-map: c1 (match-all) 0 packets<--------It stays at '0' despite of traffic being received Match: access-group name fnacl21 police: Per-interface Conform: 9426560 bytes Exceed: 16573440 bytes Workaround: Verify that the MAC addresses being transmitted through the system are learned.
Caveats • When you issue the ip http secure-server command (or if the system reads it from the startup configuration), the device will check for the existence of a persistent self-signed certificate during boot up. – If such a certificate does not exist and the device's hostname and default_domain have been set, then a persistent self-signed certificate will be generated. – If such a certificate exists, the FQDN in the certificate is compared with the current device's hostname and default_domain.
Caveats Open Caveats in Cisco IOS Release 12.2(25)SG3 This section lists the open caveats in Cisco IOS Release 12.2(25)SG3: • Changes to console speed are not updated in ROMMON. If a system is reloaded, you will not see a prompt until Cisco IOS software re-starts. Workaround: None. (CSCee65294) • On a system reload, some of the QoS policies that had previously loaded into the hardware may fail to load due to limited space.
Caveats 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:23:36.721 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: Unable to sync command to standby 01:23:46.777 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: Unable to sync command to standby 01:23:56.
Caveats • When Fast Hellos is configured on an interface thru the command ip ospf dead-interval minimal hello-multiplier, the dead-interval can be changed to exceed 1 second with the ip ospf dead-interval keyword. However, the running configuration still displays the ip ospf dead-interval minimal hello-multiplier command instead of the ip ospf dead-interval command. Workaround: To change the dead-interval when Fast Hellos is enabled, first disable Fast Hellos and then configure the new dead-interval.
Caveats Resolved Caveats in Cisco IOS Release 12.2(25)SG3 This section lists the resolved caveats in Release 12.2(25)SG3: • Cisco IOS Software has been enhanced with the introduction of additional software checks to signal improper use of data structures. This feature has been introduced in select Cisco IOS Software releases published after April 5, 2007. The %DATACORRUPTION-1-DATAINCONSISTENCY error message is preceded by a timestamp: May 17 10:01:27.
Caveats • A CompactFlash module formatted on either Supervisor Engine III or Supervisor Engine IV that uses Cisco IOS Releases 12.1(14)E, 12.1(19)E, or 12.1(13)EW will not work on Supervisor Engine II-Plus. The CompactFlash module will continue to work on the other supervisor engines. Workaround: Format the CompactFlash module on any Catalyst 4500 series switch supervisor engine that uses Release 12.1(19)EW (or later).
Caveats Workaround: None. (CSCeg48586) • When changing the access VLAN ID on a sticky port configured with IPSG and voice VLAN, the secure MAC address counter on this port might become negative. This does not impact the system. Workaround: Avoid enabling IPSG on sticky ports that are configured with VVID. (CSCeg31712) • QoS policing will fail if you configure more than 1000 policers on a trunk port and you remove some of the VLANs from the trunk port. Workaround: Use less than 1000 policers.
Caveats Workaround: Reset the standby supervisor by entering the redundancy reload peer command. This command synchronizes the standby supervisor configuration with the active supervisor. • In software releases 12.2(25)EWA10, 12.2(31)SGA2 and 12.2(31)SGA3, PoE Health Monitoring Diagnostic software introduced via CSCsf26804 incorrectly reports PoE errors for module WS-X4548-GB-RJ45V, hardware revision 4.0. (Use the show module command to see the hardware revision of module.
Caveats NHRP can operate in three ways: at the link layer (Layer 2), over Generic Routing Encapsulation (GRE) and multipoint GRE (mGRE) tunnels and directly on IP (IP protocol number 54). This vulnerability affects all three methods of operation. NHRP is not enabled by default for Cisco IOS. This vulnerability is addressed by Cisco bug IDs CSCin95836 for non-12.2 mainline releases and CSCsi23231 for 12.2 mainline releases. This advisory is posted at http://www.cisco.
Caveats • When you enter the access-list N permit host hostname command on a redundant chassis operating in SSO mode, you might observe the following syslog messages. The command is not synchronized with the redundant supervisor engine, and keepalive warnings appear.
Caveats • QoS policing will fail if you configure more than 1000 policers on a trunk port and you remove some of the VLANs from the trunk port. Workaround: Use less than 1000 policers.(CSCsa57218) • Occasionally, on redundant systems in SSO mode, applying the apply cisco-phone $AVID vlan $VVID vlan macro command to an interface connected to an IP phone may render the interface in the wrong state relative to the standby supervisor engine. This causes the SVI to be “down” after the switchover.
Caveats Resolved Caveats in Cisco IOS Release 12.2(25)SG1 This section lists the resolved caveats in Release 12.2(25)SG1: • Specifically crafted CDP packets can cause a router to allocate and keep extra memory. Exploitation of this behaviour by sending multiple specifically crafted CDP packets could cause memory allocation problems on the router. Because CDP is a layer-2 protocol, this issue can only be triggered by systems that are residing on the same network segment.
Caveats Open Caveats in Cisco IOS Release 12.2(25)SG This section lists the open caveats in Cisco IOS Release 12.2(25)SG: • Changes to console speed are not updated in ROMMON. If a system is reloaded, you will not see a prompt until Cisco IOS software re-starts. Workaround: None. (CSCee65294) • On a system reload, some of the QoS policies that had previously loaded into the hardware may fail to load due to limited space.
Caveats 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:23:36.721 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: Unable to sync command to standby 01:23:46.777 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: Unable to sync command to standby 01:23:56.
Caveats • When Fast Hellos is configured on an interface thru the command ip ospf dead-interval minimal hello-multiplier, the dead-interval can be changed to exceed 1 second with the ip ospf dead-interval keyword. However, the running configuration still displays the ip ospf dead-interval minimal hello-multiplier command instead of the ip ospf dead-interval command. Workaround: To change the dead-interval when Fast Hellos is enabled, first disable Fast Hellos and then configure the new dead-interval.
Caveats • If you enter the default interface command at the interface level, then at the interface configuration level, any command you enter after a macro apply command is not accepted. The Help(?) feature will show only two options: exit and help. Workaround: Exit, then re-enter interface configuration mode. All commands will be accepted, even after you enter the macro apply command. (CSCsa44632) • Entering the no ip flow ingress command will not turn off the collection of switched IP flows.
Caveats Cisco’s statement and further information are available on the Cisco public website at http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml (CSCei54611) Open Caveats in Cisco IOS Release 12.2(25)EWA13 This section lists the open caveats in Cisco IOS Release 12.2(25)EWA13: • While configuring Smartport macros via HTTP interactively, a switch might restart unexpectedly.
Caveats • A Catalyst 4500 series switch upgrading to IOS versions 12.2(25)EWA or 12.2(31)SG might show unusual uptime in the output of the show version command: Switch uptime is 113 years, 43 weeks, 4 days, 7 hours, 53 minutes This does not impact the operation of the Catalyst 4500 series switch, appearing to be strictly cosmetic. Workaround: Power-cycle the switch.
Caveats Interface Admin Oper Power(Watts) Device Class From PS To Device --------- ------ ---------- ---------- ---------- ------------------- ----Fa5/3 on auto 429496 42944.
Caveats • When hardcoded duplex and speed settings are deleted after an interface shuts down, an "a-" is added to the duplex and speed in the output from the show interface status command. This does not impact performance. Workaround: Issue the no shutdown command. (CSCsg27395) • A Catalyst 4500 series switch might experience high CPU utilization due to the Cat4k Mgmt LoPri process and the K2CpuMan and K2L2 Address Table reviews (using the show platform health command.
Caveats Workaround: None. This caveat is fixed in 12.2(25)EWA11 and 12.2(31)SGA4 software releases. Release 12.2(37)SG is other recommended software release. 12.2(37)SG does not have the fix for CSCsf26804 and hence does not run into CSCsk85158. A linecard replacement is not needed. Do not RMA the module. (CSCsk85158) Open Caveats in Cisco IOS Release 12.2(25)EWA10 This section lists the open caveats in Cisco IOS Release 12.
Caveats *Nov 13 address *Nov 13 address *Nov 13 address *Nov 13 address 12:56:32.066 CLT-1: 00:D0:02:2D:38:1A 12:56:34.030 CLT-1: 00:D0:02:2D:38:1A 12:56:34.046 CLT-1: 00:D0:02:2D:38:1A 12:56:34.062 CLT-1: 00:D0:02:2D:38:1A K2L2AddressTableMan::newEntry index 61956 vlan 1020 K2L2AddressTableMan::deleteEntry index 55620 vlan 1010 K2L2AddressTableMan::newEntry index 55620 vlan 1010 K2L2AddressTableMan::deleteEntry index 61956 vlan 1020 Workaround: None.
Caveats This situation occurs on Cisco IOS Release 12.2(31)SGA1 or lower (except for Cisco IOS Release 12.2(25)EWA10). Note This situation does not exist on the WS-X4148-RJ45V. Workaround: Download an image that supports PoE Health Monitoring such as Cisco IOS Release 12.2(37)SG, 12.2(31)SGA2, or 12.2(25)EWA10. These software images have code that will monitor, detect, and attempt to correct random S2W errors.
Caveats This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20070808-IOS-IPv6-leak.shtml. (CSCef77013) • The Cisco Next Hop Resolution Protocol (NHRP) feature in Cisco IOS contains a vulnerability that can result in a restart of the device or possible remote code execution. NHRP is a primary component of the Dynamic Multipoint Virtual Private Network (DMVPN) feature.
Caveats • A Catalyst 4500 series switch running Cisco IOS Release 12.(25)EWA8 will send in dot1q tagged cdp packets when dot1x is enabled on a voice VLAN port. This might cause gigabit IP phones to send in packets that are untagged, moving the phone into the data VLAN. Workaround: Do either of the following: – Remove dot1x from the port. – Upgrade the IOS image to Cisco IOS 12.2(31)SGA or later.
Caveats • When you remove the radius-server source-ports 1645-1646 default command, the switch sends the RADIUS requests with the wrong source port, causing the authentication attempts to fail. Workaround: Ensure that the radius-server source-ports 1645-1646 command is configured and reload the switch. Upon boot-up, the command will be in the running-config and communication with the RADIUS server will resume.
Caveats (CSCsb12598) • Cisco IOS device may crash while processing malformed Secure Sockets Layer (SSL) packets. In order to trigger these vulnerabilities, a malicious client must send malformed packets during the SSL protocol exchange with the vulnerable device. Successful repeated exploitation of any of these vulnerabilities may lead to a sustained Denial-of-Service (DoS); however, vulnerabilities are not known to compromise either the confidentiality or integrity of the data or the device.
Caveats Note Another related advisory has been posted with this advisory. This additional advisory also describes a vulnerability related to cryptography that affects Cisco IOS. This related advisory is available at the following link: http://www.cisco.com/warp/public/707/cisco-sa-20070522-crypto.shtml. A combined software table for Cisco IOS is available to aid customers in choosing a software releases that fixes all security vulnerabilities published as of May 22, 2007.
Caveats Resolved Caveats in Cisco IOS Release 12.2(25)EWA8 This section lists the resolved caveats in Cisco IOS Release 12.2(25)EWA8: In a switch running Cisco IOS Release 12.2(25)EWA8, the following symptoms might be observed. – ARP does not resolve for directly-connected devices, impacting connectivity and preventing routing protocols from forming an adjacency.
Caveats (CSCsg70355) Note Using NTP is not a workaround to this problem, because it does not carry any information about timezones or summertime. Open Caveats in Cisco IOS Release 12.2(25)EWA7 This section lists the open caveats in Cisco IOS Release 12.2(25)EWA7: • While configuring Smartport macros via HTTP interactively, a Catalyst 4500 series switch might restart unexpectedly.
Caveats Workaround: Issue the ip ftp source-interface command rather than the ip ftp source-interface command. (CSCsd22662) • Reconfiguring a heavily-used policy map on a Catalyst 4500 series switch may cause the switch to crash. This issue impacts Cisco IOS Releases 12.2(25)EWA3, 12.2(25)EWA4, 12.2(25)EWA5, 12.2(25)EWA6, 12.2(25)SG and 12.2(31)SG. Workaround: Remove the policy-map from all interfaces before reconfiguring its contents.
Caveats Workaround: Use packets sizes less than or equal to 6656 bytes or use Cisco IOS Release 12.2(25)EWA5 until the fix is available in subsequent releases. The fix will be available in 12.2(25)EWA7 release onwards. (CSCse29295) • On a Catalyst 4500 series switch with an IOS-based supervisor engine running Cisco IOS Release 12.
Caveats You can verify the failure by looking at the output of the show platform software interface stub internal command for any of the faulty ports.
Caveats • Upon reloading a Catalyst 4500 series switch configured with the ip ftp source-interface command and running Cisco IOS Release 12.2(25)EWA5, it is impossible to upload a configuraton to the FTP Server by issuing the copy running-config ftp command. Workaround: Issue the ip ftp source-interface , instead of the ip ftp source-interface command.
Caveats Open Caveats in Cisco IOS Release 12.2(25)EWA6 This section lists the open caveats in Cisco IOS Release 12.2(25)EWA6: • When you enter the access-list N permit host hostname command on a redundant chassis operating in SSO mode, you might observe the following syslog messages. The command is not synchronized with the redundant supervisor engine, and keepalive warnings appear.
Caveats • When a third-party device is connected to a 1000BaseX interface and the link is shutdown/unshutdown, the autonegotiation process takes considerable time to complete and the link needs several minutes to come up again. Workaround: Disable autonegotiation or flow-control. (CSCse33607) Resolved Caveats in Cisco IOS Release 12.2(25)EWA6 This section lists the resolved caveats in Cisco IOS Release 12.
Caveats %SW_VLAN-4-VTP_INTERNAL_ERROR: VLAN manager received an internal error 14 from vtp function vtp_download_info: Bad parent VLAN ID-Traceback=... Workarounds: – Return to VTP version 1. – Use a 'ring' value in the range for 1 - 1005 for all Token Ring VLANs (CSCsc69560) • When you configure “logging host X.X.X.X vrf,” on a WS-X4515 chassis that is running Cisco IOS Release 12.2(25)EWA5 or 12.2(25)SG, the chassis does not accept the command line to delete this configuration.
Caveats Workarounds: – Remove the failed power supply from the bay. – Upgrade to Cisco IOS Release 12.2(25)EWA6 or releases after Cisco IOS Releases 12.2(31)SG. (CSCse18104) • If an interface is set to “not autonegotiate” from SNMP, and an snmp get is done to query the state of the interface, the correct state is returned. However, if the interface is set to “not autonegotiate” from the CLI, then an snmp get will show that it is still in autonegotiate mode, even though it isn't.
Caveats http://www.cisco.com/warp/public/707/cisco-sa-20070124-crafted-ip-option.shtml (CSCek26492) • The Cisco IOS Transmission Control Protocol (TCP) listener in certain versions of Cisco IOS software is vulnerable to a remotely-exploitable memory leak that may lead to a denial of service condition. This vulnerability only applies to traffic destined to the Cisco IOS device. Traffic transiting the Cisco IOS device will not trigger this vulnerability.
Caveats 000102: Jul 9 config-changed 000103: Jul 9 config-changed 000104: Jul 9 config-changed 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:23:06.598 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:16.642 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:26.682 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:36.721 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:46.
Caveats Workaround: Exit, then re-enter interface configuration mode. All commands will be accepted, even after you enter the macro apply command. (CSCsc05612) • When VRF Packet Leaking is configured on a Catalyst 4500 series switch with a Supervisor Engine IV, a packet loss of 50 per cent occurs when you ping a Catalyst 4500 series switch VRF interface IP address from a device in the global table. Packets forwarded by Catalyst 4500 series switch are not impacted. Workaround: None.
Caveats – Repair the duplex mis-match. Ensure that both the switch and the far-end device are both auto-negotiating or forced to operate at same speed and duplex. (CSCsb62330) • A Catalyst 4500 series switch does not forward an 802.1X request with NULL credentials. Workaround: None. (CSCej03858) • A port enabled for Loop Guard that participates in spanning tree (and is in BLK state) goes into a loop inconsistent state when it stops receiving BPDUs from its neighbor.
Caveats • After moving to a non-redundant chassis, a supervisor engine previously configured in SSO mode cannot configure router ports or port-channel. Workarounds: – 1. Before moving the supervisor engine to a non-redundancy-capable chassis, change the mode to RPR. – 2. Enter the write memory command and reload the switch from the non-redundancy chassis.
Caveats Resolved Caveats in Cisco IOS Release 12.2(25)EWA4 This section lists the resolved caveats in Cisco IOS Release 12.2(25)EWA4: • Issuing the no ip flow ingress command does not turn off the collection of switched IP flows. Workaround: Use the no ip flow ingress command in conjunction with the no ip flow ingress layer2-switched command. (CSCsa67042) • Modifying a policer may not work if you configure more than 800 policers.
Caveats • A Catalyst 4500 series switch running the Cisco IOS Release 12.2(25)EWA2 does not send LinkUp traps (IF-MIB). Workaround: Issue the snmp trap link-status permit duplicates command on the interfaces. (CSCsb38308) Note • Do not use this command with redundant supervisor engines because its behavior at switchover is unpredictable. Moreover, it does not work with the interface range command; configure the command on every interface.
Caveats – CSCse40078/CSCse47765—Integer Wrap in VTP revision – CSCsd34855/CSCei54611—Buffer Overflow in VTP VLAN name Cisco’s statement and further information are available on the Cisco public website at http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml (CSCei54611) Open Caveats in Cisco IOS Release 12.2(25)EWA3 This section lists the open caveats in Cisco IOS Release 12.2(25)EWA3: • Changes to console speed are not updated in ROMMON.
Caveats 000100: Jul 9 config-changed 000101: Jul 9 config-changed 000102: Jul 9 config-changed 000103: Jul 9 config-changed 000104: Jul 9 config-changed 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:22:46.534 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:22:56.566 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:06.598 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:16.
Caveats • If you enter the default interface command at the interface level, then at the interface configuration level, any command you enter after a macro apply command is not accepted. The Help(?) feature will show only two options: exit and help. Workaround: Exit, then re-enter interface configuration mode. All commands will be accepted, even after you enter the macro apply command.
Caveats Workaround: Because this only occurs around 20 per cent of the time, simply reboot the switch. After the switch boots, this problem will not occur. (CSCsa96753) Open Caveats in Cisco IOS Release 12.2(25)EWA2 This section lists the open caveats in Cisco IOS Release 12.2(25)EWA2: • Changes to console speed are not updated in ROMMON. If a system is reloaded, you will not see a prompt until Cisco IOS software re-starts. Workaround: None.
Caveats 000103: Jul 9 config-changed 000104: Jul 9 config-changed 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:23:16.642 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:26.682 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:36.721 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:46.777 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:56.
Caveats • Under certain rare scenarios, the packet match counter in show policy-map interface fa6/1 does not show the packets being matched, as in the following configuration: clearwater#sh policy-map int FastEthernet6/2 Service-policy output: p4 Class-map: ipc2 (match-all) 0 packets<---------- It shouldn't stay at '0'.
Caveats For example, the intent of the following command sequence is to drop packets with source or destination IP address 20.4.1.2 on the SPAN destination port Gigabit Ethernet 6/5: Switch(config)# Switch(config)# Switch(config)# Switch(config)# access-list 1 deny 20.4.1.
Caveats • When the active supervisor engine on a Catalyst 4500 series switch redundant chassis is running Release 12.1-based IOS and the standby supervisor engine is running 12.2-based IOS, the following IPC error is seen, and the active supervisor engine is reset by the standby supervisor engine: 00:00:36: %C4K_REDUNDANCY-4-KEEPALIVE_WARNING: Keepalive messages from peer Supervisor are missing for 27 seconds 00:00:38: %CHKPT-3-IPCSESSION: Unable to open an IPC session for communicating with (STANDBY).
Caveats • Moving a GBIC from one port (uplink or non-uplink) to another may cause a traceback. This problem can occur on any supervisor engine in any Catalyst 4500 chassis. Workaround: Ensure that the port is administratively shutdown before you remove the GBIC. (CSCsa66349) Open Caveats in Cisco IOS Release 12.2(25)EWA1 This section lists the open caveats in Cisco IOS Release 12.2(25)EWA1: • Changes to console speed are not updated in ROMMON.
Caveats 000101: Jul 9 config-changed 000102: Jul 9 config-changed 000103: Jul 9 config-changed 000104: Jul 9 config-changed 000105: Jul 9 config-changed 000106: Jul 9 config-changed 000107: Jul 9 config-changed 01:22:56.566 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:06.598 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:16.642 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:26.682 PDT: %HA_CONFIG_SYNC-3-LBL_CFGSYNC: command to standby 01:23:36.
Caveats • After an SSO switchover, you may receive a “PM-4-PORT_INCONSISTENT” error message on the switch console if you enter the shutdown command, then the no shutdown command on the port that is in UDLD error-disable state. This does not impact the switch; the port remains in UDLD error-disable state. Re-entering the shutdown command, then the no shutdown command on the same port will ensure that the error message does not re-appear. Workaround: None.
Caveats For example, the intent of the following command sequence is to drop packets with source or destination IP address 20.4.1.2 on the SPAN destination port Gigabit Ethernet 6/5: Switch(config)# Switch(config)# Switch(config)# Switch(config)# access-list 1 deny 20.4.1.
Caveats Resolved Caveats in Cisco IOS Release 12.2(25)EWA1 This section lists the resolved caveats in Release 12.2(25)EWA1: • NetFlow Feature Acceleration has been deprecated and removed from Cisco IOS. The global command ip flow-cache feature-accelerate will no longer be recognized in any IOS configuration. If your router configuration does not currently contain the command ip flow-cache feature-accelerate, this change does not affect you.
Caveats • Insertion of unsupported SFPs (small form-factor pluggable optics) into a WS-X4448-GB-SFP or WS-X4448-GB-LX module and can cause undetected communication failures between the supervisor engine and the corresponding module. Subsequent insertion or removal of SFPs from the module is not recognized by the system. This activity can be observed on a Catalyst 4500 series switch using Release 12.1(12c)EW1 or later releases. Workaround: Reset the module with the hw-module module reset command.
Caveats • After moving to a non-redundant chassis, a supervisor engine that was previously configured in SSO mode will not be able to configure router ports or port-channel. Workarounds: 1. Before moving the supervisor engine to a non-redundancy-capable chassis, change the mode to RPR. 2. Enter the write memory command and reload the switch from the non-redundancy chassis.
Caveats • Under certain rare scenarios, the packet match counter in show policy-map interface fa6/1 does not show the packets being matched, as in the following configuration: clearwater#sh policy-map int FastEthernet6/2 Service-policy output: p4 Class-map: ipc2 (match-all) 0 packets<---------- It shouldn't stay at '0'.
Caveats • Issuing the no ip flow ingress command will not turn off the collection of switched IP flows. Workaround: Use the no ip flow ingress command in conjunction with the no ip flow ingress layer2-switched command. (CSCsa67042) • QoS policing will fail if you configure more than 1000 policers on a trunk port and you remove some of the VLANs from the trunk port. Workaround: Use less than 1000 policers. (CSCsa57218) • Modifying a policer may not work if you configure more than 800 policers.
Caveats • When a Catalyst 4500 series switch exhausts the packet buffers and can no longer receive packets, the Rx-No_pkt_Buff field in the output of the show platform interface all command may not get updated. Workaround: None. (CSCef72691) • Per-flow Border Gateway Protocol (BGP) AS information is not collected. As a result, BGP AS information will not be available in any of the aggregation caches. Workaround: None. (CSCin85662) • Multicast over Generic Routing Encapsulation (GRE) does not work.
Caveats • A CompactFlash module formatted on either Supervisor Engine III or Supervisor Engine IV that uses Cisco IOS Releases 12.1(14)E, 12.1(19)E, or 12.1(13)EW will not work on Supervisor Engine II-Plus. The CompactFlash module will continue to work on the other supervisor engines. Workaround: Format the CompactFlash module on any Catalyst 4500 series switch supervisor engine that uses Release 12.1(19)EW (or later).
Caveats • In a hierarchical policer configuration with parent as the aggregate policer and child as the microflow policer, child microflow policer-matched packets report only the packets that are in the profile (they match the policing rate). Packets that exceed the policing rate are not reported in the class-map packet match statistics. Workaround: None. (CSCef88634) • Per-flow Border Gateway Protocol (BGP) AS information is not collected.
Caveats Service-policy output: p4 Class-map: ipc2 (match-all) 0 packets<---------- It shouldn't stay at '0'. Match: access-group name ipacl_2 police: Per-interface Conform: 22937970 bytes Exceed: 977688712 bytes <--- traffic going thru Class-map: class-default (match-any) 410 packets Match: any 410 packets Workaround: Either enter a shutdown/no shutdown on the port or detach and reapply the service policy.
Caveats Workaround: Enter the redundancy reload peer command to reload the standby supervisor engine. Then, reset all the faulty line-cards with the hw-module slot reset command. (CSCsa44721) • Cisco Internetwork Operating System (IOS®) Software is vulnerable to a Denial of Service (DoS) and potentially an arbitrary code execution attack from a specifically crafted IPv6 packet. The packet must be sent from a local network segment.
Caveats • A CompactFlash module formatted on either Supervisor Engine III or Supervisor Engine IV that uses Cisco IOS Releases 12.1(14)E, 12.1(19)E, or 12.1(13)EW will not work on Supervisor Engine II-Plus. The CompactFlash module will continue to work on the other supervisor engines. Workaround: Format the CompactFlash module on any Catalyst 4500 series switch supervisor engine that uses Release 12.1(19)EW (or later).
Caveats When turning on "debug cdp even," the following message appears: CDP-EV: Received item (type : 9) with invalid length 4 Workaround: None. (CSCsf07847) • Symptoms: A router may crash if it receives a packet with a specific crafted IP option as detailed in Cisco Security Advisory: Crafted IP Option Vulnerability: http://www.cisco.com/warp/public/707/cisco-sa-20070124-crafted-ip-option.shtml Conditions: This DDTS resolves a symptom of CSCec71950.
Caveats • When in SML (Smart Missing Link) mode, some converter boxes (CPE devices) send pulses on the optical side when the Ethernet cable is removed. These converter boxes should also have an LT (Link Test) mode in which the optical side stays active regardless of the connection status and an ML (Missing Link) mode in which the optical side always stays shut down if the Ethernet cable is disconnected.
Caveats Workarounds: 1. Before moving the supervisor engine to a non-redundancy-capable chassis, change the mode to RPR mode. 2. If you do not perform the first workaround, enter the write memory command, and reload the switch from the non-redundancy chassis. (CSCef67677) • The PoE status LED on the WS-X4506-GB-T linecard is always off. Moreover, PoE status does not appear in the output of the show environment command. Workaround: None. This was fixed in Cisco IOS Release 12.2(25)EWA.
Caveats Workaround: None. (CSCdz10171) • A CompactFlash module formatted on either Supervisor Engine III or Supervisor Engine IV that uses Cisco IOS Releases 12.1(14)E, 12.1(19)E, or 12.1(13)EW will not work on Supervisor Engine II-Plus. The CompactFlash module will continue to work on the other supervisor engines. Workaround: Format the CompactFlash module on any Catalyst 4500 series switch supervisor engine that uses Release 12.1(19)EW (or later).
Caveats Resolved Caveats in Cisco IOS Release 12.2(20)EWA2 This section lists the resolved caveats in Release 12.2(20)EWA2: • Cisco Internetwork Operating System (IOS®) Software is vulnerable to a Denial of Service (DoS) and potentially an arbitrary code execution attack from a specifically crafted IPv6 packet. The packet must be sent from a local network segment. Only devices that have been explicitly configured to process IPv6 traffic are affected.
Caveats • A CompactFlash module formatted on either Supervisor Engine III or Supervisor Engine IV that uses Cisco IOS Releases 12.1(14)E, 12.1(19)E, or 12.1(13)EW will not work on Supervisor Engine II-Plus. The CompactFlash module will continue to work on the other supervisor engines. Workaround: Format the CompactFlash module on any Catalyst 4500 series switch supervisor engine that uses Release 12.1(19)EW (or later).
Caveats If your router configuration does not currently contain the command ip flow-cache feature-accelerate, this change does not affect you. The removal of NetFlow Feature Acceleration does not affect any other aspects of Netflow operation, for example Access-list processing. The features are separate and distinct. Cisco Express Forwarding (CEF) supercedes the deprecated NetFlow Feature Acceleration.
Caveats • A spurious error message appears when an SSH connection disconnects after an idle timeout. Workaround: Disable idle timeouts. (CSCec30214) • When PBR is configured on a Supervisor Engine III or Supervisor Engine IV, hardware-switched PBR packets update the access list or route map statistics improperly. Workaround: None. (CSCdz10171) • A CompactFlash module formatted on either Supervisor Engine III or Supervisor Engine IV that uses Cisco IOS Releases 12.1(14)E, 12.1(19)E, or 12.
Caveats Resolved Caveats in Cisco IOS Release 12.2(20)EWA This section lists the resolved caveats in Release 12.2(20)EWA: • The DHCP snooping database agent has a maximum of 8192 entries. If the number of DHCP bindings learned by the system exceeds this number, the entries in the database agent will be cleared out, the entries in hardware will be retained, and switching will continue. However, upon reload, bindings and connectivity will be lost. Workaround: None.
Caveats • The DHCP snooping database agent has a maximum of 8192 entries. If the number of DHCP bindings learned by the system exceeds this number, the entries in the database agent will be cleared out, the entries in hardware will be retained, and switching will continue. However, upon reload, bindings and connectivity will be lost. Workaround: None.
Caveats Resolved Caveats in Cisco IOS Release 12.2(20)EW4 This section lists the resolved caveats in release 12.2(20)EW4: • Some (or all) CDP neighbors are invisible. It only happens on releases that include the fix for CSCse85200. When turning on "debug cdp even," the following message appears: CDP-EV: Received item (type : 9) with invalid length 4 Workaround: None.
Caveats 2. Before starting up the Catalyst 3550 switch, issue the shutdown command on the Gigabit Ethernet ports on the Catalyst 4500 series switch. After starting up the Catalyst 3550 switch, issue the no shutdown command on the Gigabit Ethernet ports on the Catalyst 4500 switch. (CSCee50578) • Changes to console speed are not updated in ROMMON. If a system is reloaded, you will not see a prompt until Cisco IOS software re-starts. Workaround: None.
Caveats • A CompactFlash module formatted on either Supervisor Engine III or Supervisor Engine IV that uses Cisco IOS Releases 12.1(14)E, 12.1(19)E, or 12.1(13)EW will not work on Supervisor Engine II-Plus. The CompactFlash module will continue to work on the other supervisor engines. Workaround: Format the CompactFlash module on any Catalyst 4500 series switch supervisor engine that uses Release 12.1(19)EW (or later). (CSCeb36355) Resolved Caveats in Cisco IOS Release 12.
Caveats Workaround: Either remove the IP source guard configuration using the no ip verify source vlan dhcp-snooping port-security command and reconfigure using ip verify source vlan dhcp-snooping port-security command or shut down the interface (after removing the policy) using the shutdown command and reactivate it using the no shutdown command. (CSCee44402) • On a system reload, some of the QoS policies that had previously loaded into the hardware, may fail to load due to limited space.
Caveats More details can be found in the security advisory that is posted at http://www.cisco.com/warp/public/707/cisco-sa-20050729-ipv6.shtml. (CSCef68324) Open Caveats in Cisco IOS Release 12.2(20)EW1 This section lists the open caveats in Cisco IOS Release 12.2(20)EW1. • For Release 12.
Caveats • When in SML (Smart Missing Link) mode, some converter boxes (CPE devices) send pulses on the optical side when the Ethernet cable is removed. These converter boxes should also have an LT (Link Test) mode in which the optical side stays active regardless of the connection status and an ML (Missing Link) mode in which the optical side always stays shut down if the Ethernet cable is disconnected.
Caveats Open Caveats in Cisco IOS Release 12.2(20)EW This section lists the open caveats in Cisco IOS Release 12.2(20)EW. • For Release 12.2(18)EW or later, when the Gigabit Ethernet port of a Catalyst 3550 switch with inline power (WS-C3550-25-PWR) is connected to the Gigabit Ethernet port of a Catalyst 4500 series switch with a Supervisor Engine V (WS-X4516), the port on the Catalyst 3500 switch fails POST (power-on self test) during startup. Workarounds: 1.
Caveats disconnected. If a WS-X4148-FE-BD-LC port is connected to a converter box in SML mode, and the Ethernet cable on the box is removed, the port will eventually go into errdisable mode because of the continuous connecting and disconnecting flapping of the link. Workaround: Configure the convertor box (CPE device) to operate in either LT (Link Test) or ML (Missing Link) mode. (CSCed28409) • A spurious error message appears when an SSH connection disconnects after an idle timeout.
Caveats • When you upgrade a Cisco IOS software image from Release 12.1(12c) or 12.1(19)E to a release in the 12.2 release train, the following syslog message appears: "00:00:01: %C4K_IOSSYS-3-BLANKSTARTUPCONFIG: Blank or invalid startup-config, booting up with defaults". Workaround: You may ignore the message. (CSCed26025) • When configured for VRF-Lite, a Catalyst 4500 series switch inadvertently forwards packets received on the VRF interface for those destinations not in the VRF routing table.
Caveats Resolved Caveats in Cisco IOS Release 12.2(18)EW7 This section lists the resolved caveats in release 12.2(18)EW7: • Some (or all) CDP neighbors are invisible. It only happens on releases that include the fix for CSCse85200. When turning on "debug cdp even," the following message appears: CDP-EV: Received item (type : 9) with invalid length 4 Workaround: None. (CSCsf07847) Open Caveats in Cisco IOS Release 12.2(18)EW6 This section lists the open caveats in Cisco IOS Release 12.2(18)EW6.
Caveats Workaround: None. (CSCsa96905) • If ARP Inspection and DHCP Snooping are enabled and MAC ACLs are applied on a Catalyst 4500 series switch, the switch shows high CPU. The show platform health command shows that the processes holding the CPU are: – KxAclPathMan update – TagMan-RecreateMtegR – K2L2 Address Table R Workaround: Remove the MAC ACLs.
Caveats • A Catalyst 4500 series switch running in pim dense-mode marks the OIL of (*,G) with an "H" flag (hardware switching flag). Ordinarily, switches operating in pim dense-mode should not use (*,G) to forward traffic. This situation does not impact (S,G) multicast traffic forwarding. Workaround: None. (CSCeh46536) • After configuring speed nonnegotiate in an interface range on a WS-X4306 module on a Catalyst 4500 series switch, Symbol-Err and Sequence-Err counters may increase.
Caveats Further Information: On the 13th September 2006, Phenoelit Group posted an advisory containing three vulnerabilities: – VTP Version field DoS – Integer Wrap in VTP revision – Buffer Overflow in VTP VLAN name These vulnerabilities are addressed by Cisco IDs: – CSCsd52629/CSCsd34759—VTP version field DoS – CSCse40078/CSCse47765—Integer Wrap in VTP revision – CSCsd34855/CSCei54611—Buffer Overflow in VTP VLAN name Cisco’s statement and further information are available on the Cisco public website at
Caveats Open Caveats in Cisco IOS Release 12.2(18)EW5 This section lists the open caveats in Cisco IOS Release 12.2(18)EW5. • When 802.1Q and Layer 2 Protocol Tunneling are disabled on a switch, and the switch is rebooted after saving the configuration, spanning-tree BPDU filtering is not disabled automatically on the port. Workaround: Manually disable spanning-tree BPDU filtering on the interface with the no spanning-tree bpdufilter command.
Caveats This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20051102-timers.shtml. (CSCei61732) Open Caveats in Cisco IOS Release 12.2(18)EW4 This section lists the open caveats in Cisco IOS Release 12.2(18)EW4. • When 802.1Q and Layer 2 Protocol Tunneling are disabled on a switch, and the switch is rebooted after saving the configuration, spanning-tree BPDU filtering is not disabled automatically on the port.
Caveats The removal of NetFlow Feature Acceleration does not affect any other aspects of Netflow operation, for example Access-list processing. The features are separate and distinct. Cisco Express Forwarding (CEF) supersedes the deprecated NetFlow Feature Acceleration.
Caveats • Interfaces on the module WS-X4148-RJ45V may not establish a link with a Daiden DN-2800G media converter, when both the switch and the media converter interfaces are configured to operate at 100 Mbps and full duplex. This situation occurs when the interface on the module is configured to automatically detect and power up devices inline with the power inline auto command. This caveat is exhibited in all software releases. Workarounds: 1.
Caveats Successful attacks may cause connection resets or reduction of throughput in existing connections, depending on the attack type. Multiple Cisco products are affected by the attacks described in this Internet draft. Cisco has made free software available to address these vulnerabilities. In some cases there are workarounds available to mitigate the effects of the vulnerability. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20050412-icmp.shtml.
Caveats Workaround: Enter the ip route vrf 0.0.0.0 0.0.0.0 null 0 command. (CSCed20990) • Ports in suspended mode due to misconfiguration in the LACP port channel do not recover, even after reconfiguring the ports. This situation occurs when most ports are configured for dot1q encapsulation and one or more ports are not.
Caveats This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20050412-icmp.shtml. The disclosure of these vulnerabilities is being coordinated by the National Infrastructure Security Coordination Centre (NISCC), based in the United Kingdom. NISCC is working with multiple vendors whose products are potentially affected. Its posting can be found at: http://www.niscc.gov.uk/niscc/docs/re-20050412-00303.pdf?lang=en.
Caveats DHCP packets. Cisco is providing free fixed software to address this issue. There are also workarounds to mitigate this vulnerability. This issue was introduced by the fix included in CSCdx46180 and is being tracked by Cisco Bug ID CSCee50294. This advisory is available at http://www.cisco.com/warp/public/707/cisco-sa-20041110-dhcp.html • When in SML (Smart Missing Link) mode, some converter boxes (CPE devices) send pulses on the optical side when the Ethernet cable is removed.
Caveats • When DHCP snooping, IP source guard, and trunks are configured on all 240 interfaces of a Catalyst 4500 series switch that is equipped with a Supervisor Engine II+, all TCAM space on the switch might be exhausted. Workaround: None. (CSCed18765) • When configured for VRF-Lite, a Catalyst 4500 series switch incorrectly forwards packets received on the VRF interface for those destinations not in the VRF routing table.
Caveats Workarounds: 1. Before starting up the Catalyst 3550 switch, disconnect the cable connecting the uplink ports on the Catalyst 3550 switch to the Catalyst 4500 series switch. Once the Catalyst 3550 switch boots, reconnect the cable. 2. Before starting up the Catalyst 3550 switch, enter the shutdown command on the Gigabit Ethernet ports on the Catalyst 4500 series switch.
Caveats • The show mod command will not display the correct status of a WS-X4604-GWY module if the gateway module has failed. The status of the module incorrectly displays as “Ok,” but the correct status is “Offline.” This problem has been resolved in the Release 12.3(8.3)T image of the WS-X4604-GWY module. Workaround: Use SNMP to monitor both the gateway module and the supervisor engine as separate devices. (CSCea90578) Open Caveats in Cisco IOS Release 12.
Caveats • When you upgrade a Cisco IOS software image from Release 12.1(12c) or 12.1(19)E to a release in the 12.2 release train, the following syslog message appears: "00:00:01: %C4K_IOSSYS-3-BLANKSTARTUPCONFIG: Blank or invalid startup-config, booting up with defaults". Workaround: Ignore the message. It is harmless. (CSCed26025) • A spurious error message appears when an SSH connection disconnects after an idle timeout. Workaround: Disable idle timeouts.
Caveats that drops the "RPF failure" packets before they reach the CPU of the non-forwarding router. Normally the show ip mfib fastdrop command displays a list of all active fastdrop entries. In some cases the “fastdrop” entry might be displayed. Workaround: None. However, you can use the show ip mfib log command to validate that the RPF failure packets are not forwarded to the CPU. (CSCec45313) • If a port is in shutdown state, then the show interfaces command might report an incorrect media type.
Caveats Workaround: None. However, you can use the show ip mfib log command to validate that the RPF failure packets are not forwarded to the CPU. (CSCec45313) • Occasionally, Enabling auto QoS for the first time might cause the switch to reload. Workaround: Issue the show auto qos interface command, and then apply all displayed commands manually. (CSCec43783) • If a port is in shutdown state, then the show interfaces command might report an incorrect media type.
Caveats • Cisco IOS may permit arbitrary code execution after exploitation of a heap-based buffer overflow vulnerability. Cisco has included additional integrity checks in its software, as further described below, that are intended to reduce the likelihood of arbitrary code execution. Cisco has made free software available that includes the additional integrity checks for affected customers. This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20051102-timers.shtml.
Caveats • If you have enabled jumbo frames or baby giants, and the switch routes packets destined to a router port (as configured with the no switchport command on a WS-X4418-GB or WS-X4412-2GB-T module), the switch might reload when it tries to fragment these packets. Workaround: Either disable the jumbo frames or baby giants feature, or remove the WS-X4418-GB or WS-X4412-2GB-T module from the chassis.
Caveats cnfFeatureActive cnfFeatureAttaches cnfFeatureDetaches cnfFeatureConfigChanges 1.3.6.1.4.1.9.9.99999.1.3.4.1.3 1.3.6.1.4.1.9.9.99999.1.3.4.1.4 1.3.6.1.4.1.9.9.99999.1.3.4.1.5 1.3.6.1.4.1.9.9.99999.1.3.4.1.6 (CSCsa81379) Open Caveats in Cisco IOS Release 12.1(20)EW1 This section lists the open caveats in Cisco IOS Release 12.1(20)EW1. • For Cisco IOS Release 12.1(20)EW, in certain scenarios that entail LACP port channels, misconfigured ports do not recover, even after the configuration is fixed.
Caveats • When PBR is configured on a Catalyst 4500 Series Switch Supervisor Engine III or IV, hardware-switched PBR packets update the access list or route map statistics improperly. Workaround: None. (CSCdz10171) • When at least 2000 VLAN interfaces are configured in a startup-configuration file, a switch might take at least 10 minutes to boot up. During this time, the switch is unresponsive. Workaround: Configure fewer SVIs in the startup configuration file.
Caveats protocol ensures that only one router is elected to forward traffic to the LAN segment. The non-forwarding router, however, might still have a multicast route for that same multicast flow. If so, the non-forwarding router creates a multicast "fastdrop" entry in the hardware forwarding table that drops the "RPF failure" packets before they reach the CPU of the non-forwarding router. Normally the show ip mfib fastdrop command displays a list of all active fastdrop entries.
Caveats Resolved Caveats in Cisco IOS Release 12.1(20)EW This section lists the resolved caveats in Release 12.1(20)EW: • When a PortFast-enabled port assumes the forwarding state, it is added to the multicast flood set and starts receiving all unknown multicast traffic. This situation occurs only if the port was previously down and is now up, and IGMP snooping is enabled on that VLAN. Workaround: Disable the PortFast feature on the port.
Caveats • Release 12.1(19)EW can have 10/100 autonegotiation interoperability problems on a WS-X4148-RJ45V (Network Interface Card) that uses the Realtec RTL8139A Chipset. Workaround: Turn autonegotiation off. (CSCea18531) • The interface range command is incompatible with the no ip igmp snooping tcn flood command. Workaround: Apply the CLI directly on the interface. (CSCeb33811) Resolved Caveats in Cisco IOS Release 12.1(19)EW3 This section lists the resolved caveats in Release 12.
Caveats Workaround: Format the CompactFlash card on any Catalyst 4500 series supervisor engine running 12.1(19)EW. • If a switchport in loop-inconsistent mode is sending BPDUs and is elected the “designated root” on the segment, it will not be able to recover from loop-inconsistent mode. Workaround: Disable and then reenable the switchport. (CSCeb06811) • Release 12.
Caveats • The show mod command will not reflect the correct status of a WS-X4604-GWY module, if the gateway module has crashed. The status of the module is displayed as “Ok”; the status should be “Offline”. Workaround: Use SNMP to monitor both the gateway module and the supervisor engine as separate devices. (CSCea90578) • When a PortFast-enabled port assumes the forwarding state, it is added to the multicast flood set and starts receiving all unknown multicast traffic.
Caveats • IGMPv3 leaves are not being forwarded to the multicast router ports, which impacts bandwidth by delaying the pruning of traffic from the router to the host. The result is unwanted multicast traffic between the router and the switch, which remains longer than necessary. The problem is corrected when the router “ages out” the interface from the group, which usually occurs on the router’s next IGMP general query.
Caveats • IGMPv3 leaves are not being forwarded to the multicast router ports, which impacts bandwidth by delaying the pruning of traffic from the router to the host. The result is unwanted multicast traffic between the router and the switch, which remains longer than necessary. The problem is corrected when the router “ages out” the interface from the group, which usually occurs on the router’s next IGMP general query.
Caveats • A CompactFlash card formatted on either Supervisor Engine III or IV running 12.1E or 12.1(13)EW will not work on Supervisor Engine II-Plus. The CompactFlash card will continue to work on other supervisor engines. Workaround: Format the CompactFlash card on any Catalyst 4500 series supervisor engine running 12.1(19)EW. • If a switchport in loop-inconsistent mode is sending BPDUs and is elected the “designated root” on the segment, it will not be able to recover from loop-inconsistent mode.
Caveats • When a nonblocking gigaport is configured as “unidirectional receive-only” and as “speed nonegotiation,” the port link may not come up after both CLIs are unconfigured. Workaround: Do one of the following: – Avoid configuring both unidirectional receive-only and speed nonegotiation on the same port, because the former places a port in speed nonegotiation mode. – Enter the shut and no shut commands to reset the port’s link partner and bring up the port’s link.
Caveats • When a VLAN filter is applied to filter IP traffic based on Layer 4 information, fragmented packets might not be filtered correctly. Only the initial fragment has all the Layer 4 information. Noninitial fragments do not have any Layer 4 information (for example, UDP ports and the TCP flag). Workaround: If IP packets can be fragmented in your network, program ACLs in the VLAN map, without any Layer 4 information.
Caveats • If none of a port-channel’s ports support Jumbo Frame, your attempt to change the MTU on the port-channel will change the port-channel's MTU, but not the member ports' MTU. Moreover, none of the member ports are suspended. In contrast, if some of the member ports support jumbo frames, this scenario does not happen and the ports that do not support jumbo frames are suspended. Workaround: Do not change the port-channel's MTU if none of its member ports support jumbo frames.
Caveats Resolved Caveats in Cisco IOS Release 12.1(13)EW4 This section lists the resolved caveats in Release 12.1(13)EW4. • Through normal software maintenance processes, Cisco is removing deprecated functionality. These changes have no impact on system operation or feature availability. (CSCei76358) • Cisco IOS may permit arbitrary code execution after exploitation of a heap-based buffer overflow vulnerability.
Caveats • When a Catalyst 4000 Supervisor Engine III or IV is configured to use PBR, and the route-map specifies that the action is a default next-hop, that action is taken only if the ARP resolution for the specified host has already taken place. If the ARP resolution has not taken place, the system does not consider the host to be a valid default next-hop. Workaround: Ping the specified host to ensure that it is always in the ARP table.
Caveats • If an ACL is applied to more than one interface, and any Access Control Entry (ACE) in the ACL is subsequently modified, then the Ternary Content Addressable Memory (TCAM) usage of that ACL is multiplied by the number of interfaces to which the ACL is applied. Workaround: Detach the ACL from one interface at a time (without deleting the ACL), and then reattach the ACL to that interface. (CSCdw28603) Resolved Caveats in Cisco IOS Release 12.
Caveats • Supervisor engine status may not register as faulty and the status LED may not turn amber when a fan-tray fails or is removed. Moreover, the status LED may not go turn red when the power supply fails or is removed. Workaround: None. (CSCdz55274) • When a non-blocking gigaport is configured as “unidirectional receive-only” as well as “speed nonegotiation,” once both CLIs are unconfigured, the port link may not come up.
Caveats • When the spanning tree mode is PVST, isolated trunk ports transmit BPDUs with the primary VLAN instead of the secondary VLAN. Workaround: Use the spanning-tree bpduguard enable interface command to enable BPDU Guard to detect any BPDUs received on private VLAN trunk ports.
Caveats This POST behavior is a software issue and has been resolved in 12.1(12c)EW2, 12.1(13)EW2, 12.1(19)EW, and 12.1(20)E images. Workaround: None. (CSCeb59442) Open Caveats in Cisco IOS Release 12.1(13)EW1 This section lists the open caveats in Release 12.1(13)EW1. • Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack.
Caveats • When a non-blocking gigaport is configured as “unidirectional receive-only” as well as “speed nonegotiation,” once both CLIs are unconfigured, the port link may not come up. Workaround: Do one of the following: – Avoid configuring both unidirectional receive-only and speed nonegotiation on the same port, because the former places a port in speed nonegotiation mode. – Issue shut and no shut commands to reset the port’s link partner and bring up the port's link.
Caveats • When a secondary VLAN is disabled using the shutdown VLAN configuration command and re-enabled using the no shutdown VLAN configuration command, any subsequent flooded/multicast packets received on the private VLAN port does not reach all the destinations. Workaround: Do not use the shutdown and no shutdown VLAN configuration command to disable the VLAN. Instead, delete and recreate the secondary VLAN with the proper VLAN type and association configuration.
Caveats • When a large number of flows use a congested queue, some non aggressive flows might experience large drops of traffic. When the queue is cleared, the packets flow normally for all the flows. Workaround: None. (CSCea19319) Open Caveats in Cisco IOS Release 12.1(13)EW This section lists the open caveats in Release 12.1(13)EW.
Caveats • When a non-blocking gigaport is configured as “unidirectional receive-only” as well as “speed nonegotiation,” once both CLIs are unconfigured, the port link may not come up. Workaround: Do one of the following: – Avoid configuring both unidirectional receive-only and speed nonegotiation on the same port, because the former places a port in speed nonegotiation mode. – Issue shut and no shut commands to reset the port’s link partner and bring up the port's link.
Caveats • When a secondary VLAN is disabled using the shutdown VLAN configuration command and re-enabled using the no shutdown VLAN configuration command, any subsequent flooded/multicast packets received on the private VLAN port does not reach all the destinations. Workaround: Do not use the shutdown and no shutdown VLAN configuration command to disable the VLAN. Instead, delete and recreate the secondary VLAN with the proper VLAN type and association configuration.
Caveats Open Caveats in Cisco IOS Release 12.1(12c)EW4 This section lists the open caveats in release 12.1(12c)EW4. • Private VLAN trunks will continue to operate as private trunks after you configure them as normal trunks using the switchport mode trunk command. While the trunks are in this state, the interfaces will not show up as private VLAN trunks in the output of the show vlan private-vlan command.
Caveats • The CLI erroneously permits enabling 802.1X on ports that are configured as private VLAN trunks and private VLAN access ports. This configuration may result in unexpected behavior. Workaround: Don't configure 802.1X on PVLAN ports.
Caveats • When a secondary VLAN is disabled using the shutdown VLAN configuration command and re-enabled using the no shutdown VLAN configuration command, any subsequent flooded/multicast packets received on the private VLAN port do not reach all the destinations. Workaround: Do not use the shutdown and no shutdown VLAN configuration command to disable the VLAN. Instead, delete and recreate the secondary VLAN with the proper VLAN type and association configuration.
Caveats cnfFeatureActiveSlot cnfFeatureTable cnfFeatureEntry cnfFeatureType cnfFeatureSlot cnfFeatureActive cnfFeatureAttaches cnfFeatureDetaches cnfFeatureConfigChanges 1.3.6.1.4.1.9.9.99999.1.3.3 1.3.6.1.4.1.9.9.99999.1.3.4 1.3.6.1.4.1.9.9.99999.1.3.4.1 1.3.6.1.4.1.9.9.99999.1.3.4.1.1 1.3.6.1.4.1.9.9.99999.1.3.4.1.2 1.3.6.1.4.1.9.9.99999.1.3.4.1.3 1.3.6.1.4.1.9.9.99999.1.3.4.1.4 1.3.6.1.4.1.9.9.99999.1.3.4.1.5 1.3.6.1.4.1.9.9.99999.1.3.4.1.6 (CSCsa81379) Open Caveats in Cisco IOS Release 12.
Caveats • On systems with redundant supervisors and large and complex configurations, where the system is actively processing startup-config file, the standby supervisor engine may take over from the active supervisor engine in the boot process.
Caveats This POST behavior is a software issue and has been resolved in 12.1(12c)EW2, 12.1(13)EW2, 12.1(19)EW, and 12.1(20)E images. Workaround: None. (CSCeb59442) Open Caveats in Cisco IOS Release 12.1(12c)EW1 This section lists the open caveats in Release 12.1(12c)EW1. • Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack.
Caveats • When the spanning tree mode is PVST, isolated trunk ports transmit BPDUs with the primary VLAN instead of the secondary VLAN. Workaround: Use the spanning-tree bpduguard enable interface command to enable BPDU Guard to detect any BPDUs received on private VLAN trunk ports.
Caveats Workaround: After the switch boots, verify that the standby supervisor engine has a valid cat4000_flash:vlan.dat file. If you suspect the file is invalid, copy the valid file using the following command on the active supervisor: copy cat4000_flash:vlan.dat slavecat4000_flash:vlan.dat (CSCdy26890) • No log message is generated when a power supply fails. Workaround:.Review the output of the show power command to check the status of power supplies.
Caveats • ACLs containing more than six L4 port operators trigger L4 operator expansion. Certain range operators are expanded too broadly, which causes the affected ACEs to match more packets than they should. Less-than and greater-than operators are expanded correctly in all cases. This issue affects only Cisco IOS Release 12.1(12c)EW. Workaround: Avoid configuring ACLs that trigger L4 operator expansion. (CSCdy70646) Open Caveats in Cisco IOS Release 12.
Caveats • Disabling IGMP snooping with a large number of groups and VLANs might cause CPU HOG and HOST FLAPPING. If so, you will see messages like the following on the console: 2d07h: %SYS-3-CPUHOG: Task ran for 8692 msec (0/0), process = Exec, PC = 128790. 2d07h: %C4K_EBM-4-HOSTFLAPPING: Host 00:10:0B:10:B9:20 in vlan 200 is flapping between port Po2 and port Po1 Workaround: None.
Caveats Resolved Caveats in Cisco IOS Release 12.1(12c)EW This section lists the resolved caveats in Release 12.1(12c)EW: • A Catalyst 4006 switch with Supervisor Engine III using Release 12.1(11b)EW might crash when you enter the following command while the port channel set to channel-no is in a shutdown state: show platform software etherchannel port-channel channel-no This command was introduced in software release 12.1(11b)EW. Software release 12.1(8a)EW is not affected by this caveat.
Caveats • On a Catalyst 4006 switch with Supervisor Engine III, the output rate in show interface command might display a value greater than the bandwidth that the interface can handle. Workaround: None. (CSCdx30670) • When you use a large number of ACLs with more than 1000 entries, the switch can take more than five minutes to boot up. Workaround: Use extended named ACLs. Named ACLs specified in the ACL config mode do not exhibit this behavior.
Caveats Workaround: This condition is temporary and can be resolved by resetting the switch. (CSCdx66345) • When burst CPU traffic conditions (low CPU traffic combined with intermittent bursts of routing updates) occur, packets sent to the CPU can be lost. This traffic interruption can occur for less than one second or for a few minutes. No intervention is required, the switch recovers automatically. (CSCdy06162) • A Catalyst 4006 switch with Supervisor Engine III using Release 12.
Caveats Resolved Caveats in Cisco IOS Release 12.1(11b)EW This section lists the resolved caveats in Release 12.1(11b)EW: • In the show power and show environment commands, the status of the Power Entry Module (PEM) is reported incorrectly. If the status of the PEM is listed as bad, it is actually good, and if the status is listed as good, it is actually bad. This has no affect on system operation. n software release 12.1(8a)EW1, the PEM is supported only in the show commands.
Caveats Workaround: Do not clear the groups all at once. Instead, clear each IGMP group cache entry separately. (CSCdw46417) • When you use a large number of ACLs with more than 1000 entries, the switch can take more than five minutes to boot up. Workaround: Use extended named ACLs. Named ACLs specified in the ACL config mode do not exhibit this behavior.
Caveats Resolved Caveats in Cisco IOS Release 12.1(8a)EW1 This section lists the resolved caveats in Release 12.1(8a)EW1: • An error can occur with management protocol processing. Please use the following URL for further information: http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903 (CSCdw65903) Open Caveats in Cisco IOS Release 12.1(8a)EW This section lists the open caveats in Release 12.
Troubleshooting Review the output of the show ip msdp sa-cache EXEC command to see if some of the SAs can be filtered based on the source address, the Rendezvous point (RP) address, or the autonomous system (AS) number. (CSCdw35003) • If you create Switched Virtual Interfaces (SVI) for both a primary VLAN and secondary VLAN and then delete them, a subsequent association between the VLANs the switch could reboot your switch.
Troubleshooting Netbooting from the ROMMON Netbooting using a boot loader image is not supported. Instead, use one of the following options to boot an image: 1. Boot from a CompactFlash card by entering the following command: rommon 1> boot slot0: 2. Use ROMMON TFTP boot. The ROMMON TFTP boot is very similar to the BOOTLDR TFTP boot, except that: – the BOOTLDR variable should not be set – the TFTP server must be accessible from the Ethernet management port on the supervisor engine.
Related Documentation Troubleshooting Modules This section contains troubleshooting guidelines for modules: • When you hot insert a module into a chassis, always use the ejector levers on the front of the module to seat the backplane pins properly. Inserting a module without using the ejector levers might cause the supervisor engine to display incorrect messages about the module. For module installation instructions, refer to the Catalyst 4500 Series Module Installation Guide.
Related Documentation On Cisco.com at Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.2: Caveats Note If you have an account on Cisco.com, you can use Bug Navigator II to find caveats of any severity for any release. To reach Bug Navigator II, go to Cisco.com and click Login. Then go to Software Center: Cisco IOS Software: Cisco Bugtool Navigator II. Another option is to go to http://www.cisco.com/support/bugtools.
Related Documentation Books Major Topics • Cisco IOS Configuration Fundamentals Configuration Guide • Cisco IOS Configuration Fundamentals Command Reference • Cisco IOS Interface Configuration Guide • Cisco IOS Interface Command Reference • Cisco IOS IP and IP Routing Configuration Guide • Cisco IOS IP and IP Routing Command Reference • Cisco IOS Multiservice Applications Configuration Guide • Cisco IOS Multiservice Applications Command Reference • Cisco IOS Quality of Service Solutions
Notices Notices The following notices pertain to this software license. OpenSSL/Open SSL Project This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http://www.openssl.org/). This product includes cryptographic software written by Eric Young (eay@cryptsoft.com). This product includes software written by Tim Hudson (tjh@cryptsoft.com). License Issues The OpenSSL toolkit stays under a dual license, i.e.
Notices LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. This product includes cryptographic software written by Eric Young (eay@cryptsoft.com). This product includes software written by Tim Hudson (tjh@cryptsoft.com). Original SSLeay License: Copyright © 1995-1998 Eric Young (eay@cryptsoft.com). All rights reserved. This package is an SSL implementation written by Eric Young (eay@cryptsoft.com).
Obtaining Documentation, Obtaining Support, and Security Guidelines Obtaining Documentation, Obtaining Support, and Security Guidelines For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at: http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.
