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Using Enterprise Edge Services 35

P0910464 Issue 01 Enterprise Edge Networking Operations Guide

Port Range Setting for Legacy Networks

Enterprise Edge uses UDP port ranges to provide high priority to VoIP packets in

existing legacy IP networks. These same port ranges must be reserved and set to

high priority on all routers that an administrator expects to have QoS support.

Reserving port ranges is not required for DiffServ networks.

You can select any port ranges that are not used by well-known protocols or

applications.

Each H.323 or VoIP RTP flow uses two ports. The total number of UDP port

numbers to be reserved depends on how many concurrent RTP flows are expected

to cross a router interface. In general:

• Backbone routers reserve more ports than edge routers.

• Edge routers’ port ranges are a subset of the backbone router port ranges.

• Add UPP 5000 to high priority.

• Enterprise Edge’s port ranges are a subset of the remote router’s port ranges.

• You must reserve two ports for each voice call you expect to carry over the

WAN. You need two ports for each video session if it is given premium

treatment.

• You can reserve multiple discontinuous ranges. Nortel Networks requires each

range meet the following conditions:

- Each range must start with an even number.

- There must be an even number of ports in a range.

See Appendix B: Setting Up Remote Routers on page 167 for additional

information on setting UDP port ranges for remote routers.

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Avaya EE Networking Betriebsanweisung Seite 35