MGCP Gateway not registering

[kuldeep.kaur]

Hi Guys,

I have a 2951 router which i was able to register with CUCM using MGCP yesterday without any issue. This morning when I came back and see the status on CUCM it says it is not registered.

However if I do a Show CCM-Manager, the router says it is register with CUCM but on CUCM it says the status is unregistered. I tried removing isdn l3 bind ccm manger command, shutting down interfaces but still no success. I checked the router name domain name everything is correct nothing changed.

This is my mgcp config from the router

mgcp
mgcp call-agent 10.8.200.10 service-type mgcp version 0.1
no mgcp package-capability res-package
no mgcp timer receive-rtcp
mgcp bind control source-interface Loopback0
mgcp bind media source-interface Loopback0
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable

Priority        Status                   Host
============================================================
Primary         Registered               10.8.200.10
First Backup    Backup Ready             10.20.30.10
Second Backup   None

Please help me to fix this.

Thanks

[Jaime Valencia]

Did you try to make a call to make sure it's not just the wrong status being shown??? You can restart the RIS service in CUCM for that.

[kuldeep.kaur]

The problem is I cannot test. Reason being our existing office is going to relocate to this new site where this 2951 gateway is. I do not want to create new Device Pool (lot of dependencies) and was thinking of using the existing device pool but will change the local route group on the device pool during the change window

Is there any other way to do the testing ?

Will there be any impact to the production environment if i restart the RIS Data Collector service ?

Thanks

[Terry Cheema]

Hi Kuldeep,

Try below on the router:

conf t

no mgcp

no mgcp bind control source-interface Loopback0
no mgcp bind media source-interface Loopback0

mgcp bind control source-interface Loopback0
mgcp bind media source-interface Loopback0

mgcp

I have seen same symptoms in past with mgcp gw and if i try to remove and add back the bind commands it had worked for me.

If the issue was with your RIS service there will be lot of other devices showing the same way - for example phones, they will be showing unregistered in CUCM but working otherwise. If that's the case restarting RIS service will help.

RIS service restart should have no impact.

-Terry

[kuldeep.kaur]

Tried that but still same status

[Terry Cheema]

ok - can you post:

sh isdn status

sh run int serial X/x/x:15

sh controller e1 x/x/x brief

sh ccm-manager

sh run | s ccm | mgcp

To rule out RIS service issue you can create a route pattern (say your mobile) and point to this gateway and make a call to this number.

As said before RIS service will have no impact on the call processing, you can restart to rule it.

also confirm you are able to ping the call manager from your loopback just to make sure its routing correctly - ping 10.8.200.10 so l0

[kuldeep.kaur]

Hi Terry,

Yes I can ping the cucm 10.8.200.10. I tried to change the name on the cucm to see whether the router will get registered or not and it is not registering with cucm. When I put the correct name on cucm the router get registered immediately however the status on cucm still says unregistered. Here is the out put you requested

tor1rtr01#show isdn status
Global ISDN Switchtype = primary-net5

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply

ISDN Serial0/0/0:15 interface
        dsl 0, interface ISDN Switchtype = primary-net5
        L2 Protocol = Q.921 0x0000  L3 Protocol(s) = CCM MANAGER 0x0003
    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
    Layer 3 Status:
        0 Active Layer 3 Call(s)
    Active dsl 0 CCBs = 0
    The Free Channel Mask:  0xFFFF7FFF
    Number of L2 Discards = 0, L2 Session ID = 28
    Total Allocated ISDN CCBs = 0

!
interface Serial0/0/0:15
 no ip address
 encapsulation hdlc
 isdn switch-type primary-net5
 isdn incoming-voice voice
 isdn bind-l3 ccm-manager
 no cdp enable
end

tor1rtr01#

tor1rtr01#show controllers e1 0/0/0 brief
E1 0/0/0 is up.
  Applique type is Channelized E1 - balanced
  Description: Trunk to Telstra
  No alarms detected.
  alarm-trigger is not set
  Version info FPGA Rev: 08121917, FPGA Type: PRK1
  Framing is CRC4, Line Code is HDB3, Clock Source is Line.
  International Bit: 1, National Bits: 11111
  Data in current interval (11 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
tor1rtr01#

tor1rtr01#show ccm-manager
MGCP Domain Name: tor1rtr01.hills.hillsad.com
Priority        Status                   Host
============================================================
Primary         Registered               10.8.200.10
First Backup    Backup Ready             10.20.30.10
Second Backup   None

Current active Call Manager:    10.8.200.10
Backhaul/Redundant link port:   2428
Failover Interval:              30 seconds
Keepalive Interval:             15 seconds
Last keepalive sent:            09:07:37 UTC Dec 30 2014 (elapsed time: 00:00:09)
Last MGCP traffic time:         09:07:38 UTC Dec 30 2014 (elapsed time: 00:00:09)
Last failover time:             09:01:12 UTC Dec 30 2014 from (10.8.200.10)
Last switchback time:           09:01:42 UTC Dec 30 2014 from (10.20.30.10)
Switchback mode:                Graceful
MGCP Fallback mode:             Enabled/OFF
Last MGCP Fallback start time:  None
Last MGCP Fallback end time:    None
MGCP Download Tones:            Disabled
TFTP retry count to shut Ports: 2

Backhaul Link info:
    Link Protocol:      TCP
    Remote Port Number: 2428
    Remote IP Address:  10.8.200.10
    Current Link State: OPEN
    Statistics:
        Packets recvd:   8
        Recv failures:   0
        Packets xmitted: 13
        Xmit failures:   0
    PRI Ports being backhauled:
        Slot 0, VIC 0, port 0
Configuration Auto-Download Information
=======================================
Current version-id: 1419930100-e78bb5c5-55c6-4e86-beb1-aecb6adf88cb
Last config-downloaded:00:00:00
Current state: Waiting for commands
Configuration Download statistics:
        Download Attempted             : 11
          Download Successful          : 11
          Download Failed              : 0
          TFTP Download Failed         : 8
        Configuration Attempted        : 9
          Configuration Successful     : 9
          Configuration Failed(Parsing): 0
          Configuration Failed(config) : 0
Last config download command: New Registration
FAX mode: disable
Configuration Error History:
no network-clock-participate wic 0
end

Please ignore the last failover time as I was trying few different things

tor1rtr01# sh run | s ccm | mgcp
 pri-group timeslots 1-31 service mgcp
mgcp call-agent 10.8.200.10 2427 service-type mgcp version 0.1
no mgcp package-capability res-package
no mgcp timer receive-rtcp
sccp ccm 10.8.200.10 identifier 1 priority 1 version 7.0
sccp ccm 10.20.30.10 identifier 2 priority 2 version 7.0
sccp ccm group 1
 associate ccm 1 priority 1
 associate profile 1 register Tonsley_XCODE
 associate profile 2 register Tonsley_CONF
ccm-manager mgcp

Tks Guys

[kuldeep.kaur]

Yes and I can ping the cucm using lo 0

tor1rtr01#ping 10.8.200.10 source loopback 0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.8.200.10, timeout is 2 seconds:
Packet sent with a source address of 10.82.254.254
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 44/44/48 ms
tor1rtr01#ping 10.8.200.10 source 10.82.254.254
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.8.200.10, timeout is 2 seconds:
Packet sent with a source address of 10.82.254.254
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 44/44/48 ms
tor1rtr01#

[Terry Cheema]

Ok there are couple of options:

1) in the posted mgcp config I see you dont have bind commands. I did ask you to remove and add them back.

can you add them back and do (no mgcp/mgcp)

2) Try restart the RIS service. (or go subscriber GUI and check the status from there)

3) Completely remove all mgcp config and configure from scratch again.

4) Post the following (attach in notepad) sh run, sh inventory and a screen shot of your gateway page in CUCM

I know its a lot but very hard to troubleshooting something without having it in front.

-Terry

[iptuser55]

If the MGCP can not be fixed, what about using h323 / SIP instead?

[Ritesh Desai]

Hi folks,

Am facing the same issue. As you suggested Terry, i followed with your steps but no luck. I have attached output of 

sh ccm manager

sh isdn status

sh int Serial 0/3/0

sh controller e1

sh run

sh inv

On CUCM Manager under Gateway menu, MGCP shows me registered wiht CUCM and IP address of VG.

Pls suggest where am missing.

regards,

Ritesh Desai

[Manish Gogna]

Layer 2 status shows TEI_ASSIGNED, you should post the output of "debug isdn q921"

Manish

[Ritesh Desai]

Hi manish,

Pls suggest. I understand frame that I'm sending is not accepted. I see L1 is UP but L2 shows TEI_ASSIGNED under ISDN status.

They have similar infra where framing = NO CRC4, lincecode = hdb3 and clock source line.

regards,

Ritesh Desai.

[Deepak Mehta]

Hi Ritesh,

Try deleting and adding once again .

Also paste the screenshot from MGCP status from cucm config.Also capture the CCM logs and run Debug MGCP All .

I know it is lengthy but this is how we need to do it.

thanks

[Ritesh Desai]

Dear Deepak,

Thanks for revert. I planned to use SIP trunk between CUCM and VG and dial out calls to PSTN. :)

regards,

Ritesh Desai