No Incoming Video at SX20 end point

[yeminwin123]

Hi,

Our deployment scenario is End point >>>CUCM>>Expressway-C>>>Expressway-E and NATting at external firewall pointing to VCS-E. When I dial external call, call is connected but showing no incoming video message.

I uploaded diagnosis log fie for your review.

Appreciate any advise and suggest me which place should I check?

[Chris Swinney]

Hi yeminwin123,

I'm not 100% sure, but I didn't think that the Expresway-E should be NAT'ed on it's external interface.

Chris

[Martin Koch]

There are multiple threads here talking about how NAT has to be used with the VCS-E, which behaves similar here as the Expressway-E-

Its a valid deployment but requires the external NAT ip to be set.

In addition either the second interface has to be used or also the internal communication from the -C to the -E has to flow to the external NAT ip.

see also

http://www.cisco.com/c/en/us/support/docs/unified-communications/expressway-series/117811-configure-vcs-00.html

[yeminwin123]

We managed to solved by enabling dual network card options. So that we don't need to point to NATted IP of exp E. NAT reflection must be supported on router v or firewall to point to natted IP.