[cisco-voip] Call Setup Failure on Gateway

[Bryan Nowak]

Thanks for the tip.  That got us looking in the right direction and we ended
up finding that we had to add the command 'no fixup protocol h323 h225 1720'
to the PIX on one side of the VPN.

Bryan

----- Original Message ----- 
From: "Ryan Ratliff" <rratliff at cisco.com>
To: "Bryan Nowak" <n68851 at hotmail.com>
Cc: <cisco-voip at puck.nether.net>
Sent: Tuesday, March 06, 2007 12:27 PM
Subject: Re: [cisco-voip] Call Setup Failure on Gateway


> 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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