[cisco-voip] Call Setup Failure on Gateway

[Ryan Ratliff]

I'd start by getting a quick netmon capture from the CM to make sure  
that A) it's getting the TCP Syn from the gw for the H225 session and  
B) that the source IP address in the TCP Syn is a device that CM  
knows about.

If the VPN is doing any NAT this could cause some issues because CM  
won't accept unknown H225 connections by default.

-Ryan

On Mar 6, 2007, at 12:08 PM, Bryan Nowak wrote:

Hi,

My company moved a site over the weekend and our MPLS provider  
dropped a new
circuit in our old building.  So we've got a temporary VPN set up  
over a DSL
ckt until our T1 gets sorted out.

The problem we're having is that all inbound calls from the PSTN are
failing.  Callers hear dead air and then an error message when the  
timeout
finally expires.  Outbound calls are not experiencing any problems.

Debugging h225 shows that the gateway never gets a response to the setup
request from the CallManager.

000755: *Mar  6 17:25:07.869 UTC:
//290/76B07D918051/H323/generic_send_setup: src address =  
192.168.225.1; d
est address = 192.168.100.128
000756: *Mar  6 17:25:07.873 UTC:
//290/76B07D918051/H323/cch323_h225_set_new_state: Changing from  
H225_IDLE
  state to H225_REQ_FS_SETUP state
000757: *Mar  6 17:25:17.797 UTC: //290/76B07D918051/H323/run_h225_sm:
Received event H225_EV_RELEASE while
at state H225_REQ_FS_SETUP

Can anyone offer any ideas as to why call setup between CallManager  
and the
gateway works fine on outbound calls but not inbound?

Any ideas will be much appreciated.

Bryan

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