Specifications

28
Caveats for Cisco IOS Release 12.0
78-6455-12
Resolved Caveats—Cisco IOS Release 12.0(13)
IP Routing Protocols
• CSCdr27659
In Cisco IOS Release 12.1 and Release 12.1 T, the IP policy cache is not cleared when you use the
no ip route-cache policy interface configuration command.
Workaround: Use the clear ip cache [ address-prefix address-mask] privileged EXEC command for
a specific cache.
• CSCdr39819
A Cisco Catalyst 6000 family switch with a Multilayer Switch Feature Card (MSFC) might reload
when the show ip pim neighbor EXEC command is issued. There is no workaround.
• CSCdr49658
A Cisco 3640 router with Cisco IOS Release 12.1(2) reloads with the system returned to ROM by
bus error at PC 0x601F9A28, address 0xFFFFFFF9.
Workaround: Turn off default IP fast-switching if it is on.
• CSCdr49753
Cisco IOS Network Address Translation (NAT) might stop working if an overload mapping is
configured and an extensive File Transfer Protocol (FTP) data session is generated across the NAT
router.
Workaround: Reload the router.
• CSCdr63309
If you remove the last redistribute router configuration command from Open Shortest Path First
(OSPF) that used type-1 metric, other routers might not remove the routes from the routing table
even though the OSPF database entries are successfully removed.
Workaround: Keep the router from which you removed the redistribute router configuration
command as an autonomous system boundary router (ASBR) by removing one redistribution
completely and keeping another dummy redistribution.
Alternate workaround: Do not use the no redistribute router configuration command. Flush all the
link-state advertisements (LSAs) by using the redistribute [route-map foo] router configuration
command. Under route-map foo, disallow all routes. Enter the clear ip ospf redist command.
Now you can safely remove the redistribute router configuration command completely.
• CSCdr67362
The hash value used for rendezvous point (RP) selection process in a bootstrap router (BSR) is
calculated with a modulo of 2 to the power of 32. This modulo might cause inconsistency in the
selected RP address between Cisco and other vendors implementing BSR.
Workaround: Follow these rules to avoid inconsistency between Cisco routers when upgrading
Cisco IOS software:
If you plan to upgrade routers in your network that use BSR, avoid running Cisco IOS Release
12.0(10)S, Release 12.0(11)S, Release 12.0(11), or Release 12.1(2).
When upgrading your routers, always upgrade the candidate BSR routers first to a release later than
Cisco IOS Release 12.0(10)S, Release 12.0(11)S, Release 12.0(11), or Release 12.1(2). You do not
need to upgrade the rest of you network immediately unless you are running the images in
CSCdp95116 that might cause the routers to choose the RP on the basis of an incorrect hash value.