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Cisco Bug: CSCta42600 - incorrect sequence of 183 followed by 181 without waiting for the PRACK

Last Modified

Jul 06, 2017

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

7.1(2.20000.2)

Description (partial)

Symptom:

PRACK is enabled and Send 181 Callforward is set to True.
callflow is like this, Incorrect: 
CCM                           SBC
     <- INVITE w/offer sdp
       - 183 progress (w/answer sdp) ->
       - 181 call forward (no sdp) ->
        <- PRACK (no sdp) -
        - 481 call leg/transaction does not exist ->
          - 200 prack ->
        <- PRACK (no sdp) -
          - 200 prack ->

Conditions:

7.1.2A
Sip Trunk
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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