1751-V as MGCP gateway using CUCM 7.1.3

Answered Question
Apr 15th, 2010

Hi,

I'm running a CUCM server in a lab. It's version 7.1.3.32900-4. I'm trying to use a 1751-V with a VIC2-2BRI-NT/TE card as a gateway to the PSTN, but I am having some issues configuring it and to be honest I don't really know if they are compatible.

First the 1751-V is not listed as a gateway type, the 1751 is though. Don't know if this is an issue here.

Second when I select the 1751 I cannot choose the VIC2-2BRI-NT/TE card as being installed. I can only select the VIC-2BRI.

I think the first problem is up here, but lets say that that is not the case. I'm a bit new to this so just to verify the next steps I would take.

I've configured the gateway with a hostname of CCME, this is also the name of the gateway configured in CUCM.

CCME#show mgcp endpoint
[email protected]
[email protected]

The endpoints name in CUCM:

[email protected]

[email protected]

This is the configuration of the 1751-V gateway:

ccm-manager mgcp
mgcp
mgcp call-agent 192.168.10.12 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band

interface BRI1/0
no ip address
isdn switch-type basic-net3
isdn bind-l3 ccm-manager service mgcp
interface BRI1/1
no ip address
isdn switch-type basic-net3
isdn bind-l3 ccm-manager service mgcp

CCME#show ccm-manager
MGCP Domain Name: CCME.domain.local
Priority        Status                   Host
============================================================
Primary         Registering with CM      cm.domain.local (192.168.10.12)
First Backup    None
Second Backup   None

Current active Call Manager:    None
Backhaul/Redundant link port:   2428
Failover Interval:              30 seconds
Keepalive Interval:             15 seconds
Last keepalive sent:            09:48:09 CET Jun 27 2009 (elapsed time: 7w0d)
Last MGCP traffic time:         18:20:50 CET Apr 15 2010 (elapsed time: 00:00:29)
Last failover time:             None
Last switchback time:           None
Switchback mode:                Graceful
MGCP Fallback mode:             Not Selected
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:  192.168.10.12
    Current Link State: OPEN
    Statistics:
        Packets recvd:   0
        Recv failures:   0
        Packets xmitted: 0
        Xmit failures:   0
    BRI Ports being backhauled:
        Slot 0, VIC 1, port 1
FAX mode: cisco
Configuration Error History:

The status says at "registering with CM" after a few minutes this changes to DOWN. When I look at the endpoint ports in CUCM the ports IP's + status remain "Unknown". I'm a bit confused here on how to get this work.

The gateway is running c1700-ipvoicek9-mz.124-15.T7.bin.

Thanks for your help!

I have this problem too.
0 votes
Correct Answer by Aaron Harrison about 6 years 7 months ago

Hi

OK - firstly your selection of gateway and card type is fine.

First thing to get right (after that, of course) is to do a 'show ccm-manager' (as you have done), and then use this line:

MGCP Domain Name: CCME.domain.local

As the domain name to add to CCM - not ’CCME', but the full thing with hostname/domain name.

You can just update the gateway you've added to CCM already.

Finally, once you have the commands you have that get it to the point where it attemps to register, a good option is to let it auto configure itself:

ccm-manager config

ccm-manager config-server

This will fill in what you may have missed.

Regards

Aaron

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Correct Answer
Aaron Harrison Thu, 04/15/2010 - 09:41

Hi

OK - firstly your selection of gateway and card type is fine.

First thing to get right (after that, of course) is to do a 'show ccm-manager' (as you have done), and then use this line:

MGCP Domain Name: CCME.domain.local

As the domain name to add to CCM - not ’CCME', but the full thing with hostname/domain name.

You can just update the gateway you've added to CCM already.

Finally, once you have the commands you have that get it to the point where it attemps to register, a good option is to let it auto configure itself:

ccm-manager config

ccm-manager config-server

This will fill in what you may have missed.

Regards

Aaron

Please rate helpful posts...

2044418Puts Thu, 04/15/2010 - 09:58

Okay thanks! Now we are getting somewhere.

The CUCM is now showing up as being "registered", but there is a "TFTP File download failed" message at the bottom. Don't now why...

MGCP Domain Name: CCME.puts.local
Priority        Status                   Host
============================================================
Primary         Registered               cm.puts.local (192.168.10.12)
First Backup    None
Second Backup   None

Current active Call Manager:    192.168.10.12
Backhaul/Redundant link port:   2428
Failover Interval:              30 seconds
Keepalive Interval:             15 seconds
Last keepalive sent:            18:47:55 CET Apr 15 2010 (elapsed time: 00:00:04)
Last MGCP traffic time:         18:47:58 CET Apr 15 2010 (elapsed time: 00:00:02)
Last failover time:             None
Last switchback time:           None
Switchback mode:                Graceful
MGCP Fallback mode:             Not Selected
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:  192.168.10.12
    Current Link State: OPEN
    Statistics:
        Packets recvd:   1
        Recv failures:   0
        Packets xmitted: 0
        Xmit failures:   0
    BRI Ports being backhauled:
        Slot 0, VIC 1, port 1
Configuration Auto-Download Information
=======================================
No configurations downloaded
Current state: Waiting for commands
Configuration Download statistics:
        Download Attempted             : 1
          Download Successful          : 0
          Download Failed              : 1
          TFTP Download Failed         : 0
        Configuration Attempted        : 0
          Configuration Successful     : 0
          Configuration Failed(Parsing): 0
          Configuration Failed(config) : 0
Last config download command:
FAX mode: cisco
Configuration Error History:
TFTP File download failed

I only have BRI 1/1 being backhauled since BRI 1/0 is being used by CCME running on the router.

When I look at the CUCM config the IP address is now showing up, but the endpoint is showing up as being "Unregistered".

I suppose this is not correct???

UPDATE

I suppose this can be usefull:

CCME#show ccm-manager config-download
Configuration Auto-Download Information
=======================================
No configurations downloaded
Current state: Waiting for commands
Configuration Download statistics:
        Download Attempted             : 4
          Download Successful          : 3
          Download Failed              : 1
          TFTP Download Failed         : 0
        Configuration Attempted        : 3
          Configuration Successful     : 0
          Configuration Failed(Parsing): 0
          Configuration Failed(config) : 2
Last config download command:
Configuration Error History:
voice-port 1/1
echo-cancel coverage 8
end

I think this means that the CUCM is trying to configure 8 ms of Echo Cancel Coverage which is apparently not a supported command?? I've tried to disable Echo Cancel Coverage but this did not work.

2044418Puts Thu, 04/15/2010 - 10:14

I fixed the echo cancellation issue:

CCME(config-voiceport)#echo-cancel coverage ?
  24  24 milliseconds echo canceller coverage
  32  32 milliseconds echo canceller coverage
  48  48 milliseconds echo canceller coverage
  64  64 milliseconds echo canceller coverage

8 ms was not supported. So I chose for 24 ms. After this the configuration parsed succesfully:

Configuration Auto-Download Information
=======================================
No configurations downloaded
Current state: Waiting for commands
Configuration Download statistics:
        Download Attempted             : 6
          Download Successful          : 5
          Download Failed              : 1
          TFTP Download Failed         : 0
        Configuration Attempted        : 5
          Configuration Successful     : 1
          Configuration Failed(Parsing): 0
          Configuration Failed(config) : 4
Last config download command:
Configuration Error History:

But the endpoint is still being marked as "Unregistered". Please help me out on this one

2044418Puts Thu, 04/15/2010 - 11:01

I just figured this one out. The Endpoint remains unregistered until L1 and L2 come up which, in my case, only occures when a call is inbound or outbound.

Thanks for your help!

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