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

[Wilson Hew]

Bob/Ryan, appreciate your feedback. Thanks.

Guess I need to look at the connection between my MGCP gateway and CUCM. Any
idea what else I may need to check? I am looking at the SDI traces, but have
no idea what to look at.

Thanks,
Wil

On Tue, Nov 3, 2009 at 2:35 AM, Bob Fronk <bob at btrfronk.com> wrote:

>  I had this happening and found out it was an MPLS circuit going down.
> Due to location of this particular site, our 12mbps MPLS circuit is supplied
> by multiple T1s bonded with MLPPP.
>
>
>
> One of the T1s was going up/down several times a day (telco problem) and
> each time, the MLPPP would reset for a couple seconds.   The MGCP gateway
> responded by going into SRST and the PRI would go down for a moment.
>
>
>
> Just something to check
>
>
>
> *From:* cisco-voip-bounces at puck.nether.net [mailto:
> cisco-voip-bounces at puck.nether.net] *On Behalf Of *Wilson Hew
> *Sent:* Monday, November 02, 2009 11:47 AM
> *To:* cisco-voip at puck.nether.net
> *Subject:* [cisco-voip] MGCP - Fallback to SRST very often even though
> connectivity to CUCM is fine
>
>
>
> 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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