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MGCP Gateway and CUCM problem.

I have CUCM 7.1.4 and remote IOS MGCP Gateway, connected via E1 to PBX.

Everything works fine untill WAN link temporarily fails. After link recovers, MGCP gateway stops working.

# sho mgcp

MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE
MGCP call-agent: 10.96.36.2 2427 Initial protocol service is MGCP 0.1

CUCM show what gateway is registered okay, but calls get rejected.

Call tracing revealed this message:

05/23/2011 09:58:56.220 CCM|ConnectionManager - wait_AuDisconnectRequest ERROR:NO ENTRY FOUND IN TABLE,CI(18054240,0),dcType=1,IFCreated(0,0),PID(0-0,0-0),IFHandling(0,0),MCNode(0,0)|<CLID::StandAloneCluster><NID::10.96.36.2><CT::1,100,39,1.49539036><IP::10.96.41.18><DEV::SEP1C17D3404C98><LVL::Error><MASK::0800>

issuing

(config)# no mgcp

(config)# mgcp

fixes problem untill next WAN failure

trace log attached

Call made at 09:58:55.959

calling number 8489

called number 0040

11 Replies 11

paolo bevilacqua
Hall of Fame
Hall of Fame

Switch to H.323 or SIP, you will enjoy more features and less trouble,

Yeah.

Then switch to Asterisk.

Very wrong analogy, get informed before talking.

Tim Smith
Level 4
Level 4

Hi,

What version of IOS you running?

There have been bugs that affect fail back to MGCP after a switchover.

Have you done a search on the cisco.com bug toolkit?

Cheers,

Tim

0tim.smith wrote:

Hi,

What version of IOS you running?

There have been bugs that affect fail back to MGCP after a switchover.

Have you done a search on the cisco.com bug toolkit?

Cheers,

Tim

Tried different versions. Right now it's Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9-M), Version 12.4(24)T5, RELEASE SOFTWARE (fc3). Router 2811.

Ok so quite recent.

What about your IOS configuration?

If there's nothing obvious, then your best bet would be a TAC case.

I also agree that H.323 and SIP are usually nicer, but obviously that's a design change. And MGCP should work - it does normally switch back automatically!

However - 1 point to consider is call preservation. You'll drop all your calls when switching call control from MGCP to local in SRST mode. Not a good look normally.

Cheers,

Tim

Call preservation is really the lesser of H.323 advantages - as it requires the non TAC supported  disabling of H.225 keepalives.

http://www.cisco.com/en/US/products/sw/voicesw/ps2169/products_configuration_guide_chapter09186a00806674d2.html

The real advantages are actually others, robustness, flexibility, serviceability, config cleanliness, call blocking, TCL/ICR script support, and some more.

What about your IOS configuration?

All by the book.

(config)#  ccm-manager config server x.x.x.x

(config)#  ccm-manager config

If there's nothing obvious, then your best bet would be a TAC case.

I did already. They took time to investigate.

I also agree that H.323 and SIP are usually nicer, but obviously that's a design change.

I'd prefer to try and fix problem first. Having centralized management is one of reasons we've spent a fortune bying CUCM.

Ultair,

Did you ever get this resolved?  We are having the same issue with our MGCP not recovering too.

CCM - System version: 8.6.2.20000-2

2811 Router - Version 12.4(24)T6

Thanks!!

No, switched to SIP. Easy to debug, easy to trace.

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