Video Conferencing - RSVP reservation drops.

Hi Folks,
We are trialling a video conferencing deployment. Our WAN topology is via BGP connections to a carrier's MPLS cloud.
We have configured a Communications Manager 6 server. When we connect our 2 test routers via a local test router using EIGRP, we initiate a call and are able to see a single RSVP reservation establish and hold up indefinitely. When we attempt a second video call, it is correctly refused as per our intended policy. However, when we connect the 2 test routers to the carrier's IP cloud via BGP, we cannot get the RSVP reservation to hold up, it drops after 60 seconds (as per the CM6 setting) and we note Path Tear messages in our RSVP debug.
Could anyone provide advice on why this would be happening. Configs attached.
Cheers, SteveK.

This may not apply to you, but it just might. I just discussed something similar concerning an MPLS cloud on which video setup would fail. The customer, in a troubleshooting effort, bypassed the MPLS cloud and ran the video directly over VPN and the conferencing worked fine. When the customer reintroduced the MPLS cloud path, the setup failed.
After troubleshooting, it was ascertained that the video call setup encountered errors because the MPLS cloud could not process the size of the MTU packet being sent. You may wish to look at that as a possible point of failure.

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I am trying to establish video conferencing from outside to inside on a polycom device which is behind ASA5510, but when I try to establish the video conference from outside it drops after 13min. I tried this with a router and it works fine so it must be ASA.
I tried capturing the traffic and when the connection drops I get these messages
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1610: 06:06:06.044461 x.x.x.x > y.y.y.y: icmp: x.x.x.x udp port 3278 unreachable
1458: 06:38:40.344357 y.y.y.y > x.x.x.x.3230: FP 3535913775:3535913829(54) ack 1558746194 win 8044
1469: 06:38:42.352871 y.y.y.y > x.x.x.x.3230: FP 3535913775:3535913829(54) ack 1558746194 win 8044
1470: 06:38:46.365841 y.y.y.y > x.x.x.x.3230: FP 3535913775:3535913829(54) ack 1558746194 win 8044
1471: 06:38:54.391276 y.y.y.y > x.x.x.x.3230: FP 3535913775:3535913829(54) ack 1558746194 win 8044
1472: 06:39:10.442985 y.y.y.y > x.x.x.x.3230: FP 3535913775:3535913829(54) ack 1558746194 win 8044

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Video Conferencing - RSVP reservation drops.

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