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Cisco Bug: CSCup75947 - VCS B2BUA ACK processing fails causing SIP call negotiation failure

Last Modified

Dec 18, 2017

Products (3)

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

Known Affected Releases

X8.0 X8.2

Description (partial)

Symptom:On a VCS running 8.2 in a WebEx Enabled Telepresence environment, B2BUA fails to process and forward on the ACK sent by an MCU in response to a WebEx 200OK. The results in a SIP negotiation failure where the connection ultimately times out on the WebEx side and WebEx sends a BYE.

Conditions:WebEx Enabled Telepresence where MCU dials out to WebEx.

Related Community Discussions

Webex Enabled Telepresence
Hi, We are working on the webex enabled telepresence and I am getting a DNS error, however our normal DNS zone works ie I can call the OSLO traffic cam's SIP uri and others outside of our business. From the VCSe I can also do an nslookup and see the A records for our webex domain and the sip.webex.com domain. Looking at the search history I get the 'resolution failed' attached. Everything else is working with the WET apart from the actual call! It will schedule etc, telepresence endpoints gather ...
Latest activity: Aug 27, 2014
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  • Status
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  • Related Community Discussions
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