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Cisco Bug: CSCvv51537 - Version number in SIP SDP origin (o=) line incremented during re-INVITE

Last Modified

Sep 01, 2020

Products (3)

  • Cisco TelePresence Video Communication Server (VCS)
  • Cisco TelePresence Video Communication Server Model
  • Cisco Expressway

Known Affected Releases


Description (partial)

re-INVITE generated by Expressway increments the SDP version number (o=) field even with no change in SDP

Expressway initially is the answerer and sends 200 OK with SDP.  Part of re-INVITE with SDP, Expressway is offerer.
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