Solved: ccum : how to create call point to point between two endpoints don't have any rout between them

ios_s · ‎12-08-2019

In our enterprise, the network topology is hierarchic: (see in the old architecture image attached)

It uses static routing

The PC B can ping to PC 2

The PC A can ping to PC 1

All traffic routed to the head office only

Any traffic routed to the head office only

Any site is routed to the headquarter site only

The regional site or branch site can see the headquarter site only

The dynamic routing is permanently forbidden

The PC1 cannot ping to PC2

There isn’t any way to created NAT or routing (access) between the regional offices or branch offices

There isn’t any connectivity between the terminal A and terminal B ,

there isn’t ping between PCA and PCB.

This topology of intranet uses the private lines between sites (head, regional and branch) through telecom operator without connection to Internet

It has about 1000 branch offices

In old collaboration (telepresence) architecture (see in old architecture image attached), we used the VCS and MCU in headquarter site and in regional offices

By special configuration: the VSCs can transport the media (see it in subzone image attached)

Our problem: in new architecture (CUCM) the terminal A cannot call terminal B (point to point call).

We must keep this strategy of routing we cannot change it,

If you have any configuration in infrastructure collaboration allows terminal A call terminal B point to point without rout between between them , without NAT, without any routers configuration , please help me. And thank you

Nuno Melo · ‎12-26-2019

If we add the expressway E and C , can the video traffic pass through the expressway ?

Yes,if you use MRA to register the endpoints then expressawy C will hairpin the media, check the following doc as an example of the media flow using expressway:

https://www.cisco.com/c/en/us/td/docs/solutions/PA/ICE/icepa125.html

So if you make sure all endpoints can reach expresswayC/E pair you should not require routing between devices.

Another solution can be adding a virtual cube, and use it also to hairpin the calls, however this would be a more complex solution to deploy.

View solution in original post

Jaime Valencia · ‎12-09-2019

You would need to use MTP/TRP for every single call to make that happen, and if you don't want to configure anything besides CUCM, then you'd be limited by the amount of MTP sessions from CUCM.

HTH

java

if this helps, please rate

TONY SMITH · ‎12-09-2019

CUCM has configuration called "Trusted Relay Point". A transcoder or an MTP can be designated a Trusted Relay point. Phones and gateways can be configured with the option "Require Trusted Relay Point", and with that selected they will route their media (RTP) via a Trusted Relay Point and not direct. What I don't know is how you'd configure it for only certain destinations, so I can't think of a way to make it only apply for site to site calls rather than all calls. I've only come across this mechanism on a device by device basis, for example applied to softphones so their media can benefit from QoS.

Nuno Melo · ‎12-20-2019

Not Sure the MTP suggestion can work, from the images provided it seems to be a video endpoint network, if that is the case, mtp's don't support video traffic as far as i know only voice traffic is supported by cucm mtp's.

ios_s · ‎12-22-2019

thank you Nuno Melo

yes, its the video endpoints

if we add the expressway E and C , can the video traffic pass through the expressway ?

explain:

In our enterprise, the network topology is hierarchic: