Specifications

1372
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Resolved Caveats—Cisco IOS Release 12.0(27)S
The vulnerability is only present in IOS release trains based on 12.0S, 12.2, and 12.3. Releases based
on 12.0, 12.1 mainlines and all IOS images prior to 12.0 are not affected. Refer to the Security
Advisory for a complete list of affected release trains.
Further details and the workarounds to mitigate the effects are explained in the Security Advisory
which is available at the following URL:
http://www.cisco.com/warp/public/707/cisco-sa-20040818-ospf.shtml.
• CSCec24324
Symptoms: A Cisco router may reload when you enter the show ip hardware-cef prefix command
on a line card that uses hardware-based Cisco Express Forwarding (CEF) tables.
Conditions: This symptom is observed on a Cisco 12000 series that is running Cisco IOS
Release 12.0(26)S with Border Gateway Protocol (BGP) enabled.
Workaround: There is no workaround.
• CSCec27239
Symptoms: A Cisco router that processes external link-state advertisements (LSAs) may generate
spurious memory access tracebacks or reload unexpectedly.
Conditions: This symptom is observed on a Cisco router that runs Open Shortest Path First version 3
(OSPFv3).
Workaround: There is no workaround.
• CSCec29868
Symptoms: An Open Shortest Path First version 3 (OSPFv3) adjacency may flap when a standby
Route Processor (RP) comes up after a switchover has occurred or after a router has reloaded. The
router database may contain duplicate entries of the link link-state advertisement (LSA), or network
LSA, or both.
Conditions: This symptom is observed after a switchover has occurred when the interface number
of the interface that is configured for OSPFv3 changes.
This symptom is also observed after the router has reloaded when the interface number of the
interface that is configured for OSPFv3 changes and when the neighbor still has the LSA (that was
generated by the router on which the symptom occurs) with the old Link State ID (LSID) in its
database. This situation may occur when the router does not clean up its LSA (for example, when
the router reloads unexpectedly) or when the interface that connects to the neighbor is shut down
before the router reloads and then brought back up after the router has reloaded.
Workaround: There is no workaround.
• CSCec29953
Symptoms: A retransmission counter may not be reset when a neighbor is terminated.
Conditions: This symptom is observed on a Cisco platform that is running Open Shortest Path First
(OSPF) when the retransmission limit default (12 or 24) is added to the retransmission mechanism.
Workaround: Clear the OSPF process by entering the clear ip ospf process pid privileged EXEC
command. Then, enter the limit retransmissions non-dc disable router configuration command.
• CSCec33377
Symptoms: A router may experience a race condition that may cause the router to pause indefinitely
when the router reloads.
Conditions: This symptom is observed on a Cisco router under the following conditions:
– A non-VPN routing/forwarding (VRF) Open Shortest Path First (OSPF) process is parsed.