Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 822

Classifying VoIP Traffic and Applying QoS Policies 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 109. PoE VoIP Traffic To classify VoIP traffic and apply QoS policies for an office VoIP deployment, use the following commands: 1. 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 2. 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 3. Create two input QoS policies, one each for PC data and voice signaling. Assign a different bandwidth weight to each policy. CONFIGURATION mode or QOS-POLICY-IN mode qos-policy-out or bandwidth-weight 4. Create an output policy map containing both QoS policies and assign them to different service queues. 822 Power over Ethernet (PoE)