Configuring Qos For An Office Voip Deployment - Dell C9000 Series Networking Configuration Manual

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
Dell#show run qos-policy-output
!
qos-policy-output VoIP_Q
scheduler strict
Honoring the Incoming dot1p Value
If you know that traffic originating from the phone is tagged with a dot1p value of 5, you can make the
associated queue a strict-priority queue, as shown in the following example.
Dell#show run int gi 0/6/10
!
interface GigabitEthernet 0/6/10
description "IP Phone X"
no ip address
portmode hybrid
switchport
service-class dynamic dot1p
service-policy output Strict_Q
power inline
no shutdown
!
Power over Ethernet (PoE) 885