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Cisco Bug: CSCta65822 - UNI: SSO during L2TP session disconnects may leave stale sessions

Last Modified

Jul 08, 2010

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

12.2(33)XNC

Description (partial)

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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