Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 740

description "Voice VLAN" no ip address tagged PeGigGE 0/6/10-11,22-23,46-47 shutdown ! interface Vlan 300 description "Voice Signaling VLAN" no ip address tagged PeGigGE 0/6/10-11,22-23,46-47 shutdown Configuring LLDP-MED for an Office VoIP Deployment VoIP deployments may optionally use LLDP-MED. LLDP-MED advertises VLAN, dot1P, and DSCP configurations on the switch so that you do not need to manually configure every phone with this information. In the following example, the phone initiates a DHCP request on the advertised voice VLAN, VLAN 200. Dell#show running-config lldp protocol lldp advertise med advertise med voice 200 6 46 advertise med voice-signaling 300 5 28 no disable Dell#show lldp neighbors Loc PortID Rem Chassis Id Rem Port Id Gi 0/6/10 0.0.0.0 001B0CDBA109:P1 Gi 0/6/11 0.0.0.0 001AA2197992:P1 Gi 0/6/22 0.0.0.0 08:00:0f:22:7f:83 Gi 0/6/23 0.0.0.0 08:00:0f:23:de:a9 Configuring QoS for an Office VoIP Deployment There are several ways you can use quality of service (QoS) to map ingress phone and PC traffic to give them each a different quality of service. Honoring the Incoming DSCP Value If you know that traffic originating from the phone is tagged with the DSCP value of 46 (EF), you can make the associated queue a strict-priority queue, as shown in the following example. Dell#show run policy-map-input ! policy-map-input HonorDSCP trust diffserv Dell#sh run int gigabitethernet 0/6/11 ! interface GigabitEthernet 0/6/11 description "IP Phone X" no ip address portmode hybrid switchport service-policy input HonorDSCP service-policy output Strict_Q power inline no shutdown ! Dell#show run policy-map-output ! policy-map-output Strict_Q service-queue 5 qos-policy VoIP_Q Power over Ethernet (PoE) 740