Classifying Voip Traffic And Applying Qos Policies - Dell C9000 Series Networking Configuration Manual

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Classifying VoIP Traffic and Applying QoS

You can avoid congestion and give precedence to voice and signaling traffic by classifying traffic based on

the subnet and using strict priority and bandwidth weights on egress, as outlined in the following steps. The

following figure depicts the topology and configuration for a C9000 system.

Figure 114. PoE VoIP Traffic

To classify VoIP traffic and apply QoS policies for an office VoIP deployment, use the following commands:

Create three standard or extended access-lists, one each for voice, voice signaling, and PC data, and

place each in its own match-any class-map.

CONFIGURATION mode or CLASS-MAP mode

ip access-list or class-map match-any

Create an input policy-map containing all three class-maps and assign each class-map a different

service queue.

CONFIGURATION mode or POLICY-MAP-IN mode

policy-map-input or service-queue

Create two input QoS policies, one each for PC data and voice signaling. Assign a different bandwidth

weight to each policy.

Power over Ethernet (PoE)

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