[cisco-voip] MGCP gateway not registering to Subscribers

[Auralythic]

Good day, all,

We have a ucm8 cluster with a publisher and three subscribers. All of our
gateways configured in 8.6.1 (3825s, 3925s) all register normally to the
publisher but none will register to the subscribers. Hostnames are all
correct. What should I be looking for? Here is a snippet of the mgcp config:

ccm-manager redundant-host b.subscriber.com c.subscriber.com
ccm-manager mgcp
no ccm-manager fax protocol cisco
ccm-manager music-on-hold
ccm-manager config server {IP address of Publisher}
ccm-manager config
!
mgcp
mgcp call-agent a.publisher.com 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode nte-gw
mgcp rtp unreachable timeout 1000 action notify
mgcp package-capability rtp-package
mgcp package-capability sst-package
mgcp package-capability pre-package
no mgcp package-capability res-package
no mgcp package-capability fxr-package
no mgcp timer receive-rtcp
mgcp timer nse-response t38 250
mgcp sdp simple
mgcp fax rate 9600
mgcp fax t38 inhibit
mgcp bind control source-interface GigabitEthernet0/0
mgcp bind media source-interface GigabitEthernet0/0
!
mgcp profile default

---------------------------------------
And a sh ccm-man

Priority        Status                   Host
============================================================
Primary         Registered               a.publisher.com {IP Address}
First Backup    Backup Ready             b.subscriber.com {IP Address}
Second Backup   Backup Ready             c.subscriber.com {IP Address}
Current active Call Manager:    {a.publisher.com IP Address}
Backhaul/Redundant link port:   2428
Failover Interval:              30 seconds
Keepalive Interval:             15 seconds
Last keepalive sent:            10:18:43 edt Jun 14 2012 (elapsed time:
00:00:09)
Last MGCP traffic time:         10:18:43 edt Jun 14 2012 (elapsed time:
00:00:09)
Last failover time:             09:35:20 edt Jun 14 2012 from (
a.publisher.com IP Address)
Last switchback time:           09:34:44 edt Jun 14 2012 from (
a.subscriber.com IP Address)
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
Configuration Auto-Download Information
=======================================
Current version-id: 1339679546-89708b39-0266-4c1c-9512-ea5d5ff2af23
Last config-downloaded:00:00:00
Current state: Waiting for commands
Configuration Download statistics:
        Download Attempted             : 2
          Download Successful          : 2
          Download Failed              : 0
          TFTP Download Failed         : 0
        Configuration Attempted        : 1
          Configuration Successful     : 1
          Configuration Failed(Parsing): 0
          Configuration Failed(config) : 0
Last config download command: New Registration
FAX mode: disable
Configuration Error History:

-------------------------------------
Any help and points to the right direction are appreciated. Obviously, we
want them to register to the subs and fail to another sub or the pub.

Thank you,

-Diana
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