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Cisco Bug: CSCuo04766 - ICT h323 with fast start - CUCM is sending ip= when TCP breaks

Last Modified

Nov 27, 2020

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases


Description (partial)

CUCM is sending ip = for fast start OLC

the customer experienced one-way audio

- CUCM  establishes the tcp connection with the first node
- Immediately after establishing the tcp connection tcp breaks
- Meanwhile CUCM has got OLCAck from the MTP with a valid port and ip
- h225Cdpc pulls tcpstopsessionind signal and ask the MTP to close the logical channel.  Now it does not have a valid Ip/port
- then CUCM opens a new TCP connection with the second node under the ICT configuration.
- The problem comes when it does not get a new OCL from MTP and sends

sessionID 1,
mediaControlChannel unicastAddress : iPAddress :
{ network '00000000'H, tsapIdentifier 1 }

The problem is originated when the ICT is not configured properly

CUCM cluster 1  -->   ICT h323  -->>  CUCM cluster 2
CUCM cluster 1 point to 2 nodes for cluster 2
CUCM cluster 2 does not have the correct nodes pointing back to cluster 2
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