Specifications

147
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(2)
ISO CLNS
• CSCdk37556
A router might fail if the distribute-list out command is configured with IS-IS as the routing
protocol. For example:
router protocol distribute-list acl out isis
This failure can occur when configuring any IP routing protocol.
The distribute-list command does not work with IS-IS, so the specification of IS-IS routing
protocol in the distribute-list command is invalid. The failure occurs because the invalid input is
not handled correctly.
Workaround: Avoid specifying IS-IS routing protocol when configuring the distribute-list out
command.
LAT
• CSCdj38034
A Cisco router running Cisco IOS Release 11.1(12) and later, fails at hi_delete, hi_open and lattcp.
Miscellaneous
• CSCdj29595
If two Cisco 7500 series routers are connected to many Ethernet interfaces with EIP interface
processors, and are running HSRP on many of these interfaces, the HSRP configuration might take
several minutes to determine the active and standby routers after a router reloads. During this
period of instability, the CPU load on the router approaches 100 percent.
Workaround: Replace the EIP interface processors with VIP interface processors and Ethernet port
adapters. A less effective workaround is to reduce the number of HSRP groups, or to increase the
HSRP hello and hold time. Cisco recommends using no more than 24 HSRP EIP interfaces. VIPs
have been approved at 80 HSRP interfaces.
• CSCdj87399
CPU intensive tasks like OIR, or commands like config net, and debug, that print a lot of output
have provoked router failures in some customer installations. It is believed that a high background
CPU load can also provoke the failure.
A software forced failure occurs because of a process watchdog timeout in ipc_cbus_process(). The
IPC input process, ipc_cbus_process(), was not suspending until it had drained its entire input IPC
message queue. This resulted in the process running too long, and suffering a process watchdog
timeout.
• CSCdk01958
The full-duplex command does not work on the 1FE PA. There is no workaround.
• CSCdk05355
The logging synchronous command can cause logging to stop. The recommended workaround is
to remove this command.
• CSCdk08850
A PA-T3 port adapter might go into loopback after a router reload. A workaround is to issue the
commands shutdown followed by no shutdown, or the clear interface command.