Specifications

Caveats for Cisco IOS Release 12.0

78-6455-12

Resolved Caveats—Cisco IOS Release 12.0(9)

• CSCdp05306

After a link flap, the summary route might not appear in the routing table even though it appears in

the OSPF topology table.

Workaround: Restart the OSPF process, or reload the router.

• CSCdp21551

If you have an Open Shortest Path First (OSPF) external route and a floating static route (as backup

for the external route) with the nexthop interface OSPF enabled, and if there is a flap in external

route, floating static will be installed in the routing table. The floating static route will not get

replaced by the external route, even when the external route comes back up.

Workaround: Enter the clear ip route {network [mask]|*} EXEC command.

• CSCdp27183

A Resource Reservation Protocol (RSVP) message will be dropped if the flags or reserved fields in

the common header are not set to zero. In this situation, you will not be able to operate within

implementations that use these fields for new features. There is no workaround.

• CSCdp30909

When you are configuring policy routing on a rotary group leader, entering the

no ip policy route-map map-tag interface configuration command on a group-async rotary group

member or several physical interface rotary group members might cause the router to reload with

a SYS-2-FREEFREE error message. There is no workaround.

• CSCdp39166

A Cisco router might reload if certain IP packets addressed to a multicast destination with an

invalid IP header are received.

On a Route Switch Processor (RSP), this situation often shows up as a bus error reload with

RSP-specific code and ipmulticast_les_fastswitch on stack trace at address=0x58200000.

This situation might also show up as a generic memory corruption reload on an RSP or on other

nonparticle-based platforms. This situation does not exist in Cisco IOS Release 11.1CC and

Cisco IOS Release 11.2.

Workaround: Disable multicast fast switching on all interfaces by entering the no ip mroute-cache

interface configuration command.

• CSCdp39947

Protocol Independent Multicast (PIM)v2 Candidate Rendezvous Point (RP) advertisement packets

are discarded by a router if the packets were sent by that route.This breaks the Candidate-RP and

bootstrap router (BSR) mechanism in PIMv2.

Workaround: Only configure a Candidate-RP in routers that are not BSR.

Miscellaneous

• CSCdk51490

A crypto Access Control List (ACL) with a DENY ACE that specifies a TCP or User Datagram

Protocol (UDP) port might cause fragments to be dropped.

Workaround: Arrange the crypto ACLs to have permits only when specifying ports. For example,

instead of having:

access-list 101 deny udp 200.200.20.0 0.0.0.255 200.200.30.0 0.0.0.255 eq 19 access-list

101 deny udp 200.200.20.0 0.0.0.255 eq 19 200.200.30.0 0.0.0.255 access-list 101 permit

udp 200.200.20.0 0.0.0.255 200.200.30.0 0.0.0.255