
468
Caveats for Cisco IOS Release 12.2(33)SRD through 12.2(33)SRD8
OL-10394-05 Rev. R0
• CSCtf07513
Symptoms: A Cisco 10000 series router crashes when removing loopback interface while sessions
are up and TCP traffic is flowing.
Conditions:
1. Reproducible under scalable scenario.
2. Sessions should have PBHK feature.
3. TCP traffic should be flowing.
4. Loopback interface sourcing address to PBHK is removed.
Workaround: Do not remove loopback interface before stopping traffic.
• CSCtf09260
Symptoms: On a Cisco 7600 that is running Cisco IOS Release 12.2(33)SRD3 that has a Multilink
PPP group configured on interfaces residing on an OSM- 1CHOC12/DS0, performing a shut
followed by a no shut on the parent Multilink interface may result in the removal of a service-policy
output command if the policy-map contains shape average with a rate greater than the rate of a
single Multilink PPP member link. The condition may also be triggered by the following:
1. When you shut and no shut on the remote Multilink interface, an event that could be replayed
during a telco event if all members fail.
2. When you remove all member links either locally or on remote peer, which results in local
Multilink down.
Conditions: This issue occurs on Cisco 7600/OSM-1CHOC12/DS0 that is running Cisco IOS
Release 12.2(33)SRD3.
1. Problem does not happen if shape average rate is less than single_member_link_rate.
2. Problem does not happen with a flat queueing policy attached to Multilink interface.
3. Problem does not happen with SIP-200 and SIP-400 with various SPA modules.
Workaround: Manually re-apply the service-policy output command.
• CSCtf12803
Symptoms: The command to configure overhead accounting on an ES+ module is not available.
Conditions: The symptom is observed with an ES+ module.
Workaround: There is no workaround.
• CSCtf15927
Symptoms: L2TPv3 session traffic stops flowing following an SSO failover.
Conditions: The symptom is observed only when the local and remote end have different cookie
configurations for the L2TPv3 session, followed by an SSO failover.
Workaround: Clear the tunnel manually.
• CSCtf16623
Symptoms: On a Cisco 7600 ES+, the internal VLAN tag is incorrectly inserted into VC-type 4
frames.
Conditions: The symptom is observed with basic functioning.
Workaround: There is no workaround.
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