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Cisco Bug: CSCup02323 - Errors between STUN Client (B2BUA) x8.1 and STUN Server x7.1 (VCSe).

Last Modified

Feb 27, 2018

Products (1)

  • Cisco TelePresence Video Communication Server (VCS)

Known Affected Releases


Description (partial)

Lync to VCS calls fail due to media negotiation problems.  The B2BUA is offering ICE on behalf of the ex90, but only succeeds in offering a 'host'IP, i.e. it's own IP address.  Debug logs show that the B2BUA is unable to retrieve the expected candidates from the TURN Server due to an error in processing allocation request/responses to/from the server.
VCS-E run with X7.1 as TURN server where VCS (X7.2 or newer version) or Expressway (X8.1 or newer version) works as STUN client include IPv6 TURN in offer, address family type = 0x17 attribute, which TURN Server X7.1 (or older version) doesn't understand this newly added attribute.
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