[cisco-voip] Gatekeeper Port Issue

[Chris Ward (chrward)]

By default I believe CUCM will register a call signaling port using an
ephemeral port. So to me, the 1720 from CUCM is the odd-ball. It's
possible that you have a CCM service parameter on your publisher set to
use 1720 rather than an ephemeral port.

 

P.S. The use of the ephemeral port in GK registration is how CUCM
determines which trunk to use when it receives an incoming call (since
with GKs, we won't know all the possible source IPs).

 

+Chris

HCS TME & Solution Architecture Team

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Afzal Bhutta
Sent: Monday, September 27, 2010 3:59 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Gatekeeper Port Issue

 

Hello Folks,
I have starange issue in my sh gatekeeper endpoints command show
different ports on CUCM-sub. Pub port is correct 1720.Anybody know
why?See out put below.
Thanks,

HQ-R1#sh gatekeeper endpoints 
                    GATEKEEPER ENDPOINT REGISTRATION
                    ================================
CallSignalAddr  Port  RASSignalAddr   Port  Zone Name         Type
Flags 
--------------- ----- --------------- ----- ---------         ----
----- 
142.100.64.11   1720  142.100.64.11   32786 GK                VOIP-GW 
    H323-ID: GK-Trunk_1
    Voice Capacity Max.=  Avail.=  Current.= 0
142.100.64.12   33037 142.100.64.12   32781 GK                VOIP-GW 
    H323-ID: GK-Trunk_2
    Voice Capacity Max.=  Avail.=  Current.= 0
142.102.64.254  1720  142.102.64.254  53905 CUBE-GK           H323-GW 
    H323-ID: CUBE-GW
    Voice Capacity Max.=  Avail.=  Current.= 0
142.102.66.254  1720  142.102.66.254  61667 GK                H323-GW 
    H323-ID: CUCME
    Voice Capacity Max.=  Avail.=  Current.= 0
Total number of active registrations = 4

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