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Cisco Bug: CSCvv13689 - CUBE does not update IP address in SDP when call fails over to another next hop gateway

Last Modified

Oct 10, 2020

Products (1)

  • Cisco 2600 Series Multiservice Platforms

Known Affected Releases

16.6.2

Description (partial)

Symptom:
++ Call flow: Client(sip) -> CUBE(sip) -> GW1(sip), GW2(sip)

++ Client's call is routed to CUBE and then to GW1 which sends 183 with its IP address in SDP. CUBE sends 183 with this IP address back to the client. Before the call is answered, GW1 sends 480 to CUBE which triggers re-routing call to GW2. GW2 sends 183 with its IP address in SDP. However, CUBE keeps sending IP address of GW1 in SDP to the client which leads to dead air condition.

Conditions:
++ Incoming and outgoing dial-peers set up with "media flow-around".

++ Early media enabled.

++ Call is re-routed to another next-hop after receiving 183 with SDP but before it is answered.
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