Users Guide

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