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Cisco Bug: CSCtd94578 - Transfer usiing E2E RSVP (SIP Preconditions) may fail when glare occurs

Last Modified

Jun 22, 2010

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

8.0(1.10000.6)

Description (partial)

Symptom:
Intermittent call failures are observed in E2E RSVP Transfer call scenarios involving SIP trunks for both blind and supervised transfers.
Blind Transfer Scenario
Phone A (CUCM Cluster1) makes an End to End RSVP ICT (SIP Trunk) call to Phone B (CUCM Cluster 2).
Phone A presses the transfer key and dials Phone C (CUCM Cluster1)
PHone A receives ringback and presses the transfer key to complete the transfer function.
Transfer completes and Phone A gets disconnected.
Due to this issue, Phone B is erroneously disconnected.
Phone C gets reorder tone.
Conditions:
Only occurs when End to End RSVP is enabled and UPDATE glare occurs between the clusters during a preconditions exchange over the SIP trunk.
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