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Cisco Bug: CSCvs56702 - CMS does not accept ACK from endpoint when VCS call optimization set to on

Last Modified

Jan 09, 2020

Products (1)

  • Cisco Meeting Server

Known Affected Releases

2.8

Description (partial)

Symptom:
When calls to CMS are routed through a VCS/Expressway that has Call Optimization enabled, the SIP invite from Expressway has the endpoint as the contact header and connection information, but when CMS sends 200OK, it replaces them with the Expressway IP, resulting in calls dropping at 1 minute (CMS logs local SIP teardown with reason 7 (transaction timeout - no provisional responses sending INVITE))

Conditions:
VCS or expressway has Call Optimization enabled (On)
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