Dell Force10 S2410-01-10GE-24P - Configuring Differentiated Services for Voice over IP

194 | Quality of Service
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Configuring Differentiated Services for Voice over IP
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 sequence is for Router 1 in the accompanying diagram: a similar configuration should be
applied to Router 2.
Figure 12-155. DiffServ VoIP Example Network Diagram