Specifications

129
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(3)
• CSCdk60926
A Cisco router might fail when executing the show ip route network command. There is no
workaround.
• CSCdk62939
Removing a static route pointing to the null interface (or loopback) can cause EIGRP instability.
There is no workaround.
• CSCdk63471
Multicast assertion does not correctly prune router interfaces when no host reports are received
from a VLAN. There is no workaround.
• CSCdk66969
With synchronization and certain topologies, some BGP routes might not get advertised after peer
reset.
Workaround: Configure no sync, or clear ip bgp x.x.x.x.
• CSCdk67786
NAT stops working once IP Cisco Express Forwarding (CEF) is turned on.
Workaround: Do not turn on IP CEF.
• CSCdk72054
A router might withdraw the summary and external LSA incorrectly after reboot.
Workaround: Issue the clear ip route * command for summary LSA and issue the clear ip ospf
redistribution command for external LSA.
• CSCdk73832
IP EIGRP generates updates and causes high CPU utilization if more equal-cost paths than
“max paths” are available. There is no workaround.
• CSCdk80809
Some routes may not be propagated by EIGRP through redundant paths. There is no workaround.
ISO CLNS
• CSCdj89820
ADMs have a low threshold on how much control traffic they can handle before resetting
themselves. When a small number of ADMs reset themselves, the resulting type 4 TARP traffic is
high enough that other ADMs reset themselves. The situation snowballs and the entire cloud
cascades down into a TARP storm. There is no workaround. Once this starts, the only solution is to
disable TARP on all the routers in the network.
• CSCdk17145
When ISO-IGRP redistributes into IS-IS a routing entry might be duplicated, which results in a
memory leak.
Workaround: Reload the router to recover the lost memory.