Cisco Bug: CSCta65822 - UNI: SSO during L2TP session disconnects may leave stale sessions
Jul 08, 2010
- Cisco ASR 1000 Series Aggregation Services Routers
Known Affected Releases
Symptom: If a switchover occurs on the ASR L2TP LAC when thousands of sessions/tunnels are being disconnected, it is possible that some sessions will be left in a "stale" state on the newly active RP. Apart from memory wastage, there is a functionality impact too since future sessions/tunnels with the same session/tunnel id as these stale sessions may be rejected. Conditions: Only occurs if a switchover is done when thousands of sessions/tunnels are being disconnected. If on the newly active RP, a tunnel either fails to resync successfully with the peer or else it receives a STOPCCN from peer while still in resync phase, then some sessions in that tunnel that were in the process of being disconnected might end up in this stale state.
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