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Best practice for voice design in WAN Edge MPLS VPN over DMVPN environment

Dear All,

It’s not a specific technical problem question, but search for the best practice solution for building an enterprise IP-telephony system over MPLS network.

My customer has chosen the WAN Edge MPLS VPN over DMVPN 2547oDMVPN for building their WAN infrastructure. The link below depicts in details the mentioned technology:

In HQ premises of the company the CUCM 8.5.1 already installed and works and I planned to use centralized call processing model for farther IP-telephony expansion. But for now I am not sure about this, because I am not clearly understand how communications between hardware IP-phones and IP communicators (which will be put in different VRFs) will be accomplished?

After little investigation I found the Virtual Route Forwarding Design Guide for Cisco Unified Communication Manager Express:

Maybe some who already have the similar project or interests in such technology integration will help me to find some SRND or best practice notes for implementing CUCM 8.5.1 in WAN MPLS network.

I will be grateful for any help.

Kind regards,

Lidiia Pastukhova

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