Error bringing up MGCP Gateway

[tomrayjr]

I have a 2801 Router that gets the following error when I try to manually bring up mgcp:

Sep 19 20:36:04.753: ISDN Se0/1/0:23 **ERROR**: L2IF_SendPkt: idb is NULL

Sep 19 20:36:04.753: ISDN Se0/1/0:23 **ERROR**: L2IF_SendprimPkt: L2IF_SendPkt failed

Has anyone seen this before?

[gogasca]

Hi Tom,

have you performed the Hard Loop Test to rule out hardware failure of the VWIC

Make sure no ACL are blocking MGCP traffic

and the following is configured.

interface serial0/1/0:23

isdn bind-l3 ccm-manager

[tomrayjr]

I had not performed any loop tests (I have been lucky w/new hardware so that's generally the last thing I suspect). There are no alarms of any kind and the d-channel is up. The only difference in this site and my others is that the PRI is fractional (only 5 channels). I know 4.1(3) & MGCP do not 'support' this configuration and that may be the crux of my problem. I was expecting a different kind of error.

[Aman Soi]

[+5]  to you.

I came across this issue and entering the isdn bind-l3 ccm-manager under serial interface resolved the issue.

regds,

aman

[Janu Sandaruwan Maha Godage]

Thanks Aman.

[Jeremy Pringle]

5.5 years later and this post just saved me.  I was changing a full PRI to a partial PRI.

I had to issue the command: no  pri-group timeslots 1-24 service mgcp. 

Then I re-added the command:  pri-group timeslots 1-12,24 service mgcp

Apparently when I did this, it removed the:  isdn bind-l3 ccm-manager command from the serial interface without my knowledge.

The T1 controller showed Up.

The Serial 0/1/0:23 interface showed Up.

CUCM showed the gateway as registered.

But the gateway would not process calls and I started seeing the errors show in the original post.

Fortunately a Google search of the error messages lead me to this post with the solution!