Diffserv For Voip Configuration Example; Figure 106. Diffserv Voip Example Network Diagram - D-Link DWS-3000 Series Configuration Manual

DiffServ for VoIP Configuration Example

One of the most valuable uses of DiffServ is to support Voice over IP (VoIP). VoIP traffic is
inherently time-sensitive: for a network to provide acceptable service, a guaranteed
transmission rate is vital. This example shows one way to provide the necessary quality of
service: how to set up a class for UDP traffic, have that traffic marked on the inbound side, and
then expedite the traffic on the outbound side. The configuration script is for Router 1 in the
accompanying diagram: a similar script should be applied to Router 2.

Figure 106. DiffServ VoIP Example Network Diagram

1 2 3
4 5 6
7 8 9
* 8 #
Layer 3 Switch
operating as
Router 1
Layer 3 Switch
operating as
Router 2
Port 0/2
Port 0/3
Internet
DiffServ for VoIP Configuration Example
22 Differentiated Services
161