Specifications

Caveats for Cisco IOS Release 12.0

78-6455-12

Resolved Caveats—Cisco IOS Release 12.0(5)

Workaround: Achieve control of the router from the console, (not from a vty connection) and

perform the following steps, assuming the corrected image resides in Flash memory (bootflash,

slot0, or slot1):

a) router# configure terminal

b) router(config)# config-register 0x0

c) Press Ctrl-C.

d) Reload the router

e) router> rommon > b slot1: new image (The “new image” is the name of Cisco IOS image,

assuming it resides in slot1.)

f) After the reload directly from Flash memory, perform a write memory to correct the boot

variable images until a fixed image is available.

• CSCdm17500

In various Cisco IOS Release 12.0 releases, the network-clock cannot be retrieved from the CBR

interface of a PA-A2 port adapter even though the CBR interface is up. It will be declared down by

the show network-clock command. There is no workaround.

• CSCdm18330

If a Cisco platform that uses asynchronous ports is sent a BREAK sequence, closely followed by

additional data, the line can stop sending output unless manual intervention occurs. This condition

can occur until an automated script sends a Telnet BREAK sequence over a reverse-Telnet

connection, and responds to a resulting prompt immediately, before the BREAK has finished. This

problem does not occur prior to Cisco IOS Release 11.3(6.5) or Release 12.0(1.4). There is no

workaround.

• CSCdm18905

Cisco Express Forwarding (CEF) drops directed broadcasts in some environments. There is no

workaround.

• CSCdm19275

If you use the Channel Port Adapter (CPA) in a Cisco 7200 series router that runs Cisco IOS

Release 11.3(3)T and greater, with CPA microcode 26.0 and greater, the CPA reloads with the

following error message displayed in the system log:

%XCPA-3-OUTHUNG: Channel2/0 - output stuck - resetting %ECPA-2-MSG: slot2 %XCPA-2-MBX:

Force dump requested -0

There is no workaround.

• CSCdm19926

If mismatched access control lists (ACLs) are used in encryption maps (for example, one side of

the encryption connection has an ACL statement that the other side lacks), existing encryption

connections can stop working after some time. There is no workaround.

• CSCdm20762

CiscoView does not correctly view the down stream channels of a Cisco AS5800 access server

because the access server does not show the correct indexes for the CAS group. There is no

workaround.

• CSCdm21388

SNMP get-next requests might loop on MAC accounting in Cisco IOS Release 12.0(3.6)S.

Workaround: Create a view that excludes this portion of the tree “ciscoIpStatMIB.1.2.1.”