Specifications

145
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(2)
• CSCdk12537
A router running Cisco IOS Release 11.3(3) and later, configured with a policy route map on a BRI
interface, might not forward packets to the next hop as specified in the set ip next-hop command.
The following conditions must exist for policy routing to fail:
– ip policy route-map name command is configured on a BRI interface
– the destination exists in the IP cache table of the policy router
Workaround: Issue a clear ip cache command, or remove fast switching by issuing the
no ip route-cache command.
• CSCdk26313
NetBIOS over TCP/IP port 139 is not getting translated.
• CSCdk26388
The router displays console error messages during periods of high serial line utilization. Error
messages are of the form:
%SYS-3-CPUHOG: Task ran for 2672 msec (87/71), Process = IP Input
• CSCdk26867
On a Cisco 2600 series router running the c2600-is-mz_113-3a_T1 image and the NAT protocol,
NAT works until the translation table times out. Only a reload of the router every 24 hours resolves
the problem.
• CSCdk28025
Routers with equal cost (redundant) paths between two Enhanced IGRP neighbors might
experience problems with redistribution of static routes with a specified next hop. This problem
only affects redistribution of static routes with a next hop specified and equal cost links with the
next hop on one of the links. The interface connected to the same net as the “next hop” must come
up after the redistribution in order to see the problem.
Workaround: Issue the clear ip route * command.
• CSCdk29300
DVMRP prunes received over a point-to-point link other than a tunnel, are silently ignored when
they are sent to a unicast address.
Workaround: Build a tunnel with the DVMRP neighbor.
• CSCdk40372
The command clear ip route net removes a connected route from the routing table which will not
be properly reinstalled. This is a regression introduced in 12.0 by CSCdk01482
Workaround: Issue the commands shutdown followed by no shutdown if the net is lost.
• CSCdk43485
If a received update has an as-path loop and/or any other bad attribute (for example, bad nexthop),
when running under soft reconfiguration inbound, the clean copy of the paths is left around
(received-only). This brings back the denied path if the command clear neighbor soft in is issued,
and might alter path selection.
• CSCdk43575
A packet translated by NAT in the fast path might fail input ACL check if it is bumped for process
switching.