Design Doubt: MRA and inter cluster (ILS)

[epicolo]

Hi guys,

lets imagine a scenario:

Central CUCM 10.5 with ILS configured. No registered devices

CUCM A with IM&P, Core and Edge with domaina.com

CUCM B with IM&P, Core and Edge with domainb.com

Central CUCM can comunicate with both CUCM A and CUCM B and there are routes btw them.

A Jabber UC register from internet via EdgeA in domaina.com (CUCM A)

A Jabber UC register from internet via EdgeB in domainb.com (CUCM B)

A call btw Jabber UC A and Jabber UC B will be external (using RMS)? or due to the ILS this will be an "internal" call and the flow will go through the CoreA and CoreB?

IF Internal:

Signaling:

Jabber UC A > Edge A > Core A > CUCM A > Central CUCM > CUCM B > Core B > Edge B - Jabber UC B

Video Path:

Jabber UC A > Edge A > Core A > Core B > Edge B > Jabber UC B

*Reminding that there are routes btw CoreA and CoreB as well as btw CUCM A and CUCM B

Is this correct?

What about IM&P? I assume that thuy will need to be federated.

Any ideas will be appreciated.

Thanks in advance.

[Jonathan Schulenberg]

It will not consume a Rich Media Session (RMS) license as long as the call is processed through Expressway as a MRA call and not a B2B call. Verify that your configuration for MRA is correct and that the call shows as an MRA call on the status page when it connects. In the end, you're correct with both the media and signaling call paths.

XMPP federation would indeed be inter-domain federation. It doesn't have to go all the way to the internet though if your internal DNS servers are configured to serve up the correct SRV records. In this case the XMPP traffic would flow:

Jabber UC A > Expressway-E > Expressway-C > CUCM-IM&P A > CUCM-IM&P B > Expressway-C > Expressway-E > Jabber UC B