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Cisco Bug: CSCvs37264 - CUBE ignores SIP UPDATE w/SDP if preceded by two 18x w/SDP

Last Modified

Jul 21, 2020

Products (18)

  • Cisco IOS
  • Cisco 4221 Integrated Services Router
  • Cisco ASR 1002-X Router
  • Cisco 4431 Integrated Services Router
  • Cisco 4321 Integrated Services Router
  • Cisco 4331 Integrated Services Router
  • Cisco VG450 Analog Voice Gateways
  • Cisco VG400 Analog Voice Gateway
  • Cisco ASR 1001-X Router
  • Cisco 4461 Integrated Services Router
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Known Affected Releases


Description (partial)

CUBE Ignores SIP UPDATE w/SDP if Preceded by two 18x w/SDP

CUBE won't send the UPDATE to the other leg and won't send a response

Any other UPDATE with SDP with the same CSeq (Retransmissions) received after that will be dropped as well by the CUBE

Receive two 18X with SDP in the same leg where the UPDATE with SDP is received
If both 18X don't have SDP, the issue won't happen

Issue starts happening with the following versions.
16.12.1a = issue happens
16.11.1a   = issue happens
16.10.1a   = issue happens
16.9.2     = issue happens
16.8.2     = issue happens
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Bug Details Include

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