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Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(32)S
Conditions: This symptom is observed rarely when all of the following conditions are present:
–
There is a very brief (shorter than 500 ms) interface flap on a point-to-point interface such as a
POS interface.
–
The flap is not noticed by the neighbor, so the neighbors interface remains up.
–
The OSPF adjacency goes down and comes back up very quickly (the total time is shorter than
500 ms).
–
OSPF runs an SPF during this period and, based on the transient adjacency information,
removes routes via this adjacency.
–
The OSPF LSA generation is delayed because of LSA throttling. When the LSA throttle timer
expires and the LSA is built, the LSA appears unchanged.
Workaround: Increase the carrier-delay time for the interface to about 1 second or longer.
Alternate Workaround: Use an LSA build time shorter than the time that it takes for an adjacency to
come up completely.
• CSCsc10494
Symptoms: When an inter-area, external, or Not-So-Stubby Area (NSSA) route is learned via a link
state update that follows the initial database synchronization, the route may not be added to the
routing table by a partial shortest path first (SPF) computation even though the LSA is installed in
the link state database. A subsequent full SPF computation causes the route to be added.
Conditions: This symptom is observed on a Cisco router and is most likely to occur when a large
number of type 3, type 5, or type 7 LSAs are advertised and withdrawn.
Workaround: Trigger an action that causes a full SPF computation.
• CSCsc36517
Symptoms: A router reloads unexpectedly when a continue statement is used in an outbound route
map.
Conditions: This symptom is observed on a Cisco router that is configured for BGP.
Workaround: There is no workaround.
• CSCsc49741
Symptoms: A router may crash when OSPFv3 is enabled.
Conditions: This symptom is observed on a Cisco router that runs a Cisco IOS software image that
integrates the fix for caveat CSCei47926. A list of the affected releases can be found at
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCei47926. Cisco IOS
software releases that are not listed in the “First Fixed-in Version” field at this location are not
affected.
Workaround: There is no workaround.
• CSCsc59089
Symptoms: BGP does not advertise all routes to a peer that sends a route-refresh request.
Conditions: This symptom is observed under the following conditions:
–
The router is in the process of converging all of its peers and has updates ready in the output
queue for the peer.
–
The peer sends a route-refresh request to the router. This may occur when the clear ip /jointfilesconvert/415844/bgp *
soft in command is entered on the peer or when a VRF is added to the peer.
–
The router processes the route-refresh request from the peer while the router still has updates in
the output queue for the peer.
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