Thanks Ryan - that's what I was hoping to hear. I'll try to set this up in a 
lab to confirm with some simple ACLs.

- Dan

From: Ryan Ratliff (rratliff) [mailto:rratl...@cisco.com]
Sent: Monday, December 01, 2014 5:33 PM
To: Daniel Pagan
Cc: cisco-voip voyp list
Subject: Re: [cisco-voip] H245Interface & Related Processes

Short answer without confirming in the lab is yes, when I send you my H245 
address I expect you to start a TCP connection to me on that port so we can 
start H245.


-Ryan

On Dec 1, 2014, at 5:12 PM, Daniel Pagan 
<dpa...@fidelus.com<mailto:dpa...@fidelus.com>> wrote:

Folks:

Hoping to get some insight on SDL process creation for H245...

Scenario is three CUCM clusters communicating over ICTs. Call is routed from 
Cluster-1 to Cluster-2... then Cluster-2 to Cluster-3. Cluster-3 sends the H245 
address & port info via H225 ALERTING to Cluster-2, which then sends its own to 
Cluster-1. Issue is Cluster-1 never establishes the H245 session with 
Cluster-2. The H245 address and port is received on Cluster-1 but no H245 
processes are being created for the MSD/TCS exchange. According to SDL traces 
on Cluster-2, the latest state of H245 on the node *sending* the ALERTING 
message is "waitForTransportEstablishment". On Cluster-1, the H245Interface 
process is never created according to SDL traces, so we never even reach the 
opportunity for TCS media caps exchange. MXTimeout occurs shortly after.

Question is... For a node receiving an H245 address & port info via H225 (the 
calling cluster...), is creation of the H245Interface and/or related H245 
process dependent on CUCM *first* establishing the new, 2nd TCP socket with the 
remote H.323 endpoint that advertised the H.245 port. In other words, at an SDL 
level, is H245Interface created only after the 2nd TCP session is successfully 
established at the transport level for H245 TCP communication? Knowing this 
would help me assess the likelihood of the issue being related to issues at the 
TCP level.

Thanks!

- Dan
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