Cisco Bug: CSCsy91206 - Ghost call experience - TCP buffers not cleaned up on session restablish
Feb 03, 2017
- Cisco 12000 Series Routers
Known Affected Releases
None Symptom: A callee may experience a phantom INVITE from the SBC when the path to the callee is down and then recovers after the caller has geven up. Conditions: The most likely scenario is when using redundant SBCs and TCP. A call is initiated using the primary SBC and the callee path is down. The caller will giveup on the call after some period(default is 32 seconds). At this pointthe caller will try and initiate the call using the secondary SBC. At some point later the original path to the callee is available and the primary SBC will continue to retransmit the original INVITE resulting in a ring at the callee for a call that no longer exists at the caller.
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Bug Details Include
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