Management and Configuration Guide K/KA/KB.15.15

Migration to release K.14.01 or greater...............................................................................346
Using the Menu to configure local mirroring.............................................................................347
Menu and WebAgent limits..............................................................................................347
Remote mirroring overview.....................................................................................................348
Quick reference to remote mirroring setup...........................................................................349
High-level overview of the mirror configuration process..............................................................349
Determine the mirroring session and destination...................................................................349
For a local mirroring session.........................................................................................349
For a remote mirroring session......................................................................................349
Configure a mirroring destination on a remote switch............................................................349
Configure a destination switch in a remote mirroring session.............................................350
Configure a mirroring session on the source switch...............................................................350
Configure a source switch in a remote mirroring session...................................................350
Configure the monitored traffic in a mirror session................................................................350
Traffic selection options................................................................................................351
Mirroring-source restrictions..........................................................................................351
About selecting all inbound/outbound traffic to mirror...............................................................351
Untagged mirrored packets...............................................................................................351
About using SNMP to configure no-tag-added................................................................352
Operating notes..........................................................................................................352
About selecting inbound traffic using an ACL (deprecated)....................................................353
About selecting inbound/outbound traffic using a MAC address............................................353
About selecting inbound traffic using advanced classifier-based mirroring................................354
Classifier-based mirroring configuration...................................................................................355
Classifier-based mirroring restrictions..................................................................................357
About applying multiple mirroring sessions to an interface.....................................................358
Mirroring configuration examples.......................................................................................360
Maximum supported frame size..............................................................................................364
Enabling jumbo frames to increase the mirroring path MTU...................................................364
Effect of downstream VLAN tagging on untagged, mirrored traffic...............................................365
Operating notes for traffic mirroring...................................................................................365
Troubleshooting traffic mirroring..............................................................................................367
10 Troubleshooting....................................................................................368
Overview............................................................................................................................368
Troubleshooting approaches..................................................................................................368
Browser or Telnet access problems..........................................................................................369
Cannot access the WebAgent...........................................................................................369
Cannot Telnet into the switch console from a station on the network........................................369
Unusual network activity........................................................................................................370
General problems............................................................................................................370
The network runs slow; processes fail; users cannot access servers or other devices..............370
Duplicate IP addresses.................................................................................................370
Duplicate IP addresses in a DHCP network.....................................................................370
The switch has been configured for DHCP/Bootp operation, but has not received a DHCP or
Bootp reply................................................................................................................370
802.1Q Prioritization problems..........................................................................................371
Ports configured for non-default prioritization (level 1 to 7) are not performing the specified
action........................................................................................................................371
Addressing ACL problems.................................................................................................371
ACLs are properly configured and assigned to VLANs, but the switch is not using the ACLs to
filter IP layer 3 packets.................................................................................................371
The switch does not allow management access from a device on the same VLAN................372
Error (Invalid input) when entering an IP address.............................................................372
Apparent failure to log all "deny" matches.....................................................................372
Contents 15