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Trusted Relay Point configuration

The Cisco Unified Communications system can be deployed in a network virtualization environment. Cisco Unified Communications Manager enables the insertion of trusted relay points (TRPs). The insertion of TRPs into the media path constitutes a first step toward VoIP deployment within a virtual network.

The underlying network infrastructure comprises one of the key shared assets in an overall network design. A number of customer use cases require support for network infrastructure virtualization, such as the following examples:

-Guest internet access

-Partner access

-Departmental or divisional separation

-Subsidiaries/mergers and acquisitions

-Application segregation (data/voice)

All these applications include a requirement to maintain traffic separation on the network device as well as between network devices.

Traffic separation translates into concepts such as Virtual Routing and Forwarding (VRF). VRF allows multiple instances of a routing table to co-exist within the same router at the same time. In a virtualized network, these different routing domains, or VRFs, typically cannot communicate directly without transiting through the data center.

This situation challenges applications such as Cisco Unified Communications, where devices in the data VRF domain, such as software endpoints running on PCs, need to communicate directly with hard phones in the voice VRF domain without hairpinning media in the data center and without directly exposing the voice and data VRFs to each other.

Below a sample configuration off TRP.  This sample setup will force softclient RTP streams (voice or video) through the MTP control point in the router. In this router you might want to add additional security settings (FW, ACL, QOS,…). We will focus here on the basic TRP configuration in the  Cisco callmanager and  ISRG2 router.

Basic Principle:

Setup:

As you can see in this setup we make a direct call between a Cisco EX90 and the CUPC client. Both devices are registered to the Callmanager 8.6.

 

Configurations: 

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