Dell Force10 S25N-S50N FTOS Configuration Guide FTOS 8.4.2.7 E-Series TeraScal - Page 798

www.dell.com | support.dell.com Classifying VOIP traffic and applying QoS policies Avoid congestion and give precedence to voice and signaling traffic by classifying traffic based on subnet and using strict priority and bandwidth weights on egress, as outlined in the steps below. Figure 36-12 depicts the topology and shows the configuration for a C-Series. The steps are the same on an S-Series. Figure 36-13 on page 799 is a screenshot showing some of the steps and the resulting running-config. Figure 36-12. Classifying VOIP Traffic and Applying QoS Policies for an Office VOIP Deployment Force10#sh run int gi 6/10 ! interface GigabitEthernet 6/10 description "IP Phone X" no ip address portmode hybrid switchport service-policy input phone-pc power inline auto no shutdown Force10#sh run int gi 6/2 ! interface GigabitEthernet 6/2 description "Uplink to E1200" no ip address switchport service-policy output BW no shutdown PC data VLAN 300: Voice Signaling VLAN 200: Voice VLAN 100: Data 6/10 queue 2, bandwidth weight 64 queue 3, strict priority queue 1, bandwidth weight 8 LLDP-MED advertisements 6/2 Force10#sh run lldp PC IP Phone X protocol lldp C-Series advertise med advertise med voice 200 6 46 advertise med voice-signaling 300 5 28 no disable E-Series Step 1 2 3 4 5 6 Task Command 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. Create an input policy-map containing all three class-maps, and assign each class-map a different service queue. ip access-list class-map match-any policy-map-input service-queue Create two input QoS policies, one each for PC data and voice signaling. Assign a different bandwidth weight to each policy. qos-policy-out bandwidth-weight Create an output policy map containing both QoS policies, and assign them to different service queues. policy-map-out service-queue Assign a strict priority to unicast traffic in queue 3. Apply the input policy map you created in Step 2 to the interface connected to the phone, and apply the output policy map you created in Step 4 to the interface connected your desired next-hop router. strict-priority service-policy Command Mode CONFIGURATION CLASS-MAP CONFIGURATION POLICY-MAP-IN CONFIGURATION QOS-POLICY-IN CONFIGURATION POLICY-MAP-OUT CONFIGURATION INTERFACE Figure 36-13 on page 799 is a screenshot showing some of the steps, above, and the resulting running-config. 798 | Power over Ethernet