Specifications

Release Notes for Cisco IOS Release 12.0 S

78-7130-11 Rev. B0

Caveats

The show controllers privileged EXEC command on the Versatile Interface Processor (VIP) card

shows the following error messages:

Tx bad vc 6

Syslog show : %CBUS-4-FIXBADTXVC: Detected and fixed bad tx vc encap on

Serial2/1/0/26:0, bad vc 0, fixed vc 24

LINK-2-INTVULN: In critical region with interrupt level=0, intfc=Serial1/0:22 -Process=

"ct3sw_periodic 1", ipl= 0, pid= 48

Workaround: Type tx-limit 5 on the interface and change the queuing mechanism. The change in

the queuing mechanism stops the draining and prevents the value from draining to zero again, even

if the tx-limit 5 is increased.

• CSCds32322

A Cisco 7500 series router with a PA-CT3 port adapter that has been channelized down to a T1

might exhibit the following error messages on any of the channelized interfaces when Weighted

Fair Queueing is enabled on the interface:

%RSP-3-RESTART: cbus complex

%RSP-3-RESTART: interface Serial5/0/0:1, output stuck

In this condition, the channelized interfaces might enter a down/down state, and you will need to

reload the router. There is no workaround.

• CSCds40737

SONET MIBs for Packet-over-SONET (POS) port adapters are not updated on Cisco 7500/RSP

series routers. There is no workaround.

• CSCds66853

A Versatile Interface Processor (VIP) with a Channelized T3 (CT3) port adapter may reload. There

is no workaround.

IP Routing Protocols

• CSCdr21205

Resource Reservation Protocol (RSVP) might tear down a session during a brief carrier state

transition on a serial interface even if the line protocol state remains up during the transition. There

is no workaround.

• CSCds40571

A Cisco router that is running Enhanced IGRP (EIGRP) may reload because of a software-forced

reload. There is no workaround.

• CSCds41275

Upgrading to Cisco IOS Release 12.0(12.5)S may cause the OSPF routing process to run with

99 percent CPU utilization and cause low memory problems.

Possible workaround: Remove and reconfigure the OSPF routing process using the router ospf

global configuration command.

• CSCds42335

A Cisco router might reload with a bus error at PC 0x605C7D44, address 0xD0D0D10 that

indicates a problem with OSPF. There is no workaround.