NETGEAR 7000 manual Following example configures DiffServ VoIP support

NETGEAR 7000 Series Managed Switch Administration Guide

The following example configures DiffServ VoIP support:

Enter Global Config mode. Set queue 5 on all ports to use strict priority mode. This queue shall be used for all VoIP packets. Activate DiffServ for the switch.

(Netgear Switch) #config

(Netgear Switch) (Config)#cos-queue strict 5 (Netgear Switch) (Config)#diffserv

Create a DiffServ classifier named 'class_voip' and define a sin- gle match criterion to detect UDP packets. The class type "match- all" indicates that all match criteria defined for the class must be satisfied in order for a packet to be considered a match.

(Netgear Switch) (Config)#class-map match-all class_voip (Netgear Switch) (Config class-map)#match protocol udp (Netgear Switch) (Config class-map)#exit

Create a second DiffServ classifier named 'class_ef' and define a single match criterion to detect a DiffServ code point (DSCP) of 'EF' (expedited forwarding). This handles incoming traffic that was previously marked as expedited somewhere in the network.

(Netgear Switch) (Config)#class-map match-all class_ef (Netgear Switch) (Config class-map)#match ip dscp ef (Netgear Switch) (Config class-map)#exit

Create a DiffServ policy for inbound traffic named 'pol_voip', then add the previously created classes 'class_ef' and 'class_voip' as instances within this policy.

This policy handles incoming packets already marked with a DSCP value of 'EF' (per 'class_ef' definition), or marks UDP packets per the 'class_voip' definition) with a DSCP value of 'EF'. In each case, the matching packets are assigned internally to use queue 5 of the egress port to which they are forwarded.

(Netgear Switch) (Config)#policy-map pol_voip in (Netgear Switch) (Config policy-map)#class class_ef (Netgear Switch) (Config policy-class-map)#assign-queue 5 (Netgear Switch) (Config policy-class-map)#exit (Netgear Switch) (Config policy-map)#class class_voip (Netgear Switch) (Config policy-class-map)#mark ip-dscp ef (Netgear Switch) (Config policy-class-map)#assign-queue 5 (Netgear Switch) (Config policy-class-map)#exit (Netgear Switch) (Config policy-map)#exit

Attach the defined policy to an inbound service interface.

(Netgear Switch) (Config)#interface 1/0/2

(Netgear Switch) (Interface 1/0/2)#service-policy in pol_voip (Netgear Switch) (Interface 1/0/2)#exit

(Netgear Switch) (Config)#exit

9-6 Differentiated Services

v1.1, May 2006