Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 523

Configure Quality of Service for an Office VOIP Deployment There are multiple ways you can use QoS to map ingress phone and PC traffic so that you can give them each a different quality of service. See Chapter 31, Quality of Service. Honor the incoming DSCP value On both the C-Series or S-Series, if you know traffic originating from the phone is tagged with the DSCP value of 46 (EF), you might make the associated queue a strict priority queue, as shown in Figure 27-10; on the C-Series and S-Series, FTOS maps DSCP 46 to queue 2 (see Table 31-5 on page 573 in the QoS chapter.) Figure 27-10. Honoring the DSCP Value on Incoming Voice Data Force10#sh run policy-map-input ! policy-map-input HonorDSCP trust diffserv Force10#sh run int gigabitethernet 6/11 ! interface GigabitEthernet 6/11 description "IP Phone X" no ip address portmode hybrid switchport service-policy input HonorDSCP power inline auto no shutdown Force10#sh run | grep strict-priority strict-priority unicast 2 Honor the incoming dot1p value On the C-Series, if you know traffic originating from the phone is tagged with a dot1p value of 5, you might make the associated queue a strict priority queue, as shown in Figure 27-11; on the C-Series, FTOS maps dot1p priority 5 to queue 2. Figure 27-11. Honoring the Dot1P Value on Incoming Voice Traffic Force10#sh run int gi 6/10 ! interface GigabitEthernet 6/10 description "IP Phone X" no ip address portmode hybrid switchport service-class dynamic dot1p power inline auto no shutdown Force10#sh run | grep strict-priority strict-priority unicast 2 Power over Ethernet | 523