03-31-2008 11:49 AM - edited 03-15-2019 09:45 AM
I have problems with a ISDN-Pri and a 3845 Gateway. It looks as a layer 2 problem on the E1 connection.
Is this a configaration issue on the 3845 gateway or a providor problem ?
039860: Mar 31 16:24:55.065: ISDN Se0/0/0:15 Q921: User RX <- SABMEp sapi=0 tei=0
039861: Mar 31 16:24:55.065: ISDN Se0/0/0:15 Q921: S4_SABME: BACKHAULED & vsc_wants_L2_up = FALSE
03-31-2008 11:55 AM
Is the connection with CM OK ?
03-31-2008 10:30 PM
Yes the connection is OK.
show mgcp
MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE
MGCP call-agent: 10.7.0.10 2427 Initial protocol service is MGCP 0.1
sh ccm-manager
MGCP Domain Name: SGS
Priority Status Host
============================================================
Primary Backup Ready 10.7.0.10
First Backup Registering with CM SGS-sub1 (10.7.0.11)
Second Backup None
04-01-2008 04:08 AM
Form the error message, I have the "feeling" it's an MGCP issue, unfortunately I'm not expert at all with MGCP.
Interface going up when removing mgcp commands would prove that.
04-01-2008 05:27 AM
usually the q921 debug shoud show the TX and RX response. This is usuallly between the Teclo and the gateway only, L3 is backhauled back to the CCM
04-01-2008 06:14 AM
From you show ccm-manager:
sh ccm-manager
MGCP Domain Name: SGS
Priority Status Host
============================================================
Primary Backup Ready 10.7.0.10
First Backup Registering with CM SGS-sub1 (10.7.0.11)
Second Backup None
It looks like there is a config problem. Verify your CCM MGCP configuration. The Primary should have a status of "Primary Registered". Looks like the GW is bouncing between the primary and backup which typically is a config issue.
Kevin
02-08-2016 03:53 AM
Hi All,
I had same problem on my router (39XX - ssh enabled). I removed the below commend and router registered to CUCM.
command:
no ip domain name yourdomain.com
04-01-2008 06:17 AM
When I remove on the gateway the binding on layer 3 with the CCM . Layer 2 and 3 comes up.
>>>>>>>>>>>>>>>>>>>>>>>>>>>
on the serieel interface:
no isdn bind-l3 ccm-manager isdn bind-l3 ccm-manager
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
But after that I cannot make any phone call
04-01-2008 06:24 AM
try "no mgcp" followed by "mgcp". Then look at the "show ccm-manager" output. If the Primary shows "Registered" then try a call. If not then maybe this web page will help:
http://www.cisco.com/en/US/tech/tk1077/technologies_configuration_example09186a00801ad22f.shtml
Kevin
04-08-2008 05:33 AM
Hi
The problem is solved. When you use SSH on the gateway, you need to configure a DNS name on the Gateway, and that was the problem. Removing the DNS name was the solution. I have send this Bug to Cisco TAC.
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