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Video on 9971 - Dropping Packets one direction on CVO

I have an extreamly frustrating issue we're trying to nail down.

Customer is an international corporation headquartered here in the US. Currently, we're working with a small deployent of Cisco Communications Manager 8.5 and about to scale up to cover the entire company. For remote locations and work from home they're using a CVO deployment. Everything is fine as far as voice goes but as soon as we introduce video with 9971's things start going wrong - but only when the call is initiated in a certain manner.

  • LAN <---> LAN - No issues
  • LAN ---> CVO - Video appears scambled but only on the LAN side.
  • CVO ---> LAN - No issues
  • CVO <---> CVO Video appears scambled on the receiving side

The currenty region for the remote phones is setup as G.729 and 384K for the video bandwidth. We've logged into the phones and check the phone logs and can not seem to find the issue. The phones are getting/appear to be using the correct bandwidth. We've knocked the video down to 200K and the video gets a little better but not acceptable at all.

The CVO routers have a 1MB traffic shaped limit for upload speeds. We've removed that and tried the call and it did not appear to make a difference.

We have a TAC case open - the case started with the UC team, however, they seemd stumped and transfered us to the VPN team. After some packet captures we've concluded that there are some large packets being sent from the remote phone but are not being received out of the hub router.

The flow for the phone traffic is:

((REMOTE PHONE)) <------> ((CVO ROUTER)) <-----> (((INTERNET))) <----> ((OUTSIDE ASA)) <-----> ((DMVPN HUB ROUTER)) <-----> ((INSIDE ASA)) <----> ((LAN)) <------> ((LOCAL PHONE))

What are the possibilities that this is a CUCM issue? Because it only happens when the call is initiated in one direction it doesn't seem like it would be a network issue.

Any thoughts would be greatly appriciated.

TIA

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