[cisco-voip] MGCP - Fallback to SRST very often even though connectivity to CUCM is fine

[Ryan Ratliff]

Seems like a pretty high number of AuditEndpoints are failing.  Check  
CCM traces to see why the endpoint is unregistering.  If for some  
reason CUCM doesn't get a response from an MGCP message it will force  
a reset after 3 retries.

-Ryan

On Nov 2, 2009, at 11:47 AM, Wilson Hew wrote:

Hello there,

Greetings. I am having problem with my MGCP gateway, and I need little  
help and advice. My MGCP gateway is running as SRST, and it will  
fallback to SRST very often (twice a day). And it will go back to  
normal operation from fallback just after that. The connectivity from  
my MGCP gateway (remote site) to CUCM is fine.

I noticed my E1 is going down everytime when it falls back to SRST -  
is it considered normal?

My gateway is running 12.4(24)T1 and CUCM version 7.0.2.

In 'sh ccm-manager', I have the below:
--------------------------------------------------------------
TFTP retry count to shut Ports: 2

Statistics:
     Packets recvd:   857
     Recv failures:   1
     Packets xmitted: 852
     Xmit failures:   0
--------------------------------------------------------------
In 'sh mgcp stats':

  UDP pkts rx 557379, tx 558783
  Unrecognized rx pkts 0, MGCP message parsing errors 0
  Duplicate MGCP ack tx 9, Invalid versions count 0
  CreateConn rx 36256, successful 36249, failed 7
  DeleteConn rx 36274, successful 36101, failed 173
  ModifyConn rx 66178, successful 66126, failed 52
  DeleteConn tx 154, successful 154, failed 0
  NotifyRequest rx 54652, successful 54516, failed 136
  AuditConnection rx 3, successful 3, failed 0
  AuditEndpoint rx 14887, successful 8080, failed 6807
  RestartInProgress tx 6248, successful 6248, failed 0
  Notify tx 342779, successful 342779, failed 0
  ACK tx 201075, NACK tx 7191
  ACK rx 349100, NACK rx 0
  Collisions: Passive 0, Active 0
--------------------------------------------------------------

Can I tell what is wrong with the above? Apart from that, I see  
numbers of slips in controllers e1 increasing, and I have network- 
clock-participate configured.

Would appreciate if you could give me your feedback about this. Any  
feedback is very much appreciated.

Thanks,
Wil
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