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Cisco Bug: CSCum09910 - VoLTE Subscriber SIP Request routed to the wrong next hop address

Last Modified

Jan 28, 2017

Products (1)

  • Cisco ASR 5000 Series

Known Affected Releases

14.1(10)

Description (partial) 

Symptom:
A VoLTE subscriber (IMSI 311480059630563) cannot accept a terminating phone call to their VoLTE device.

Conditions:
This issue seem to be related to session recovery on the standby chassis.  Either the subscriber session is check pointed to Standby (The IPv6 next-hop is not learnt from the IP pool) or incorrectly learnt.  As a result, when the egress IPv6 traffic is routed out, it is routing using the default gateway.
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