Netgear M5300-28G-POE+ (GSM7228PSv1h2) - 12-Port Managed Gigabit Switch Ratgeber Für Administratoren
DiffServ
298
Managed Switches
DiffServ for VoIP
One of the most valuable uses of DiffServ is to support Voice over IP (VoIP). VoIP traffic is
inherently time sensitive: For a network to provide acceptable service, a guaranteed
transmission rate is vital. This example shows one way to provide the necessary quality of
service: how to set up a class for UDP traffic, have that traffic marked on the inbound side,
and then expedite the traffic on the outbound side. The configuration script is for Router 1 in
the accompanying diagram: A similar script should be applied to Router 2.
inherently time sensitive: For a network to provide acceptable service, a guaranteed
transmission rate is vital. This example shows one way to provide the necessary quality of
service: how to set up a class for UDP traffic, have that traffic marked on the inbound side,
and then expedite the traffic on the outbound side. The configuration script is for Router 1 in
the accompanying diagram: A similar script should be applied to Router 2.
Port 1/0/2
Internet
Layer 3 switch
operating as Router 2
operating as Router 2
Port 1/0/3
Layer 3 switch
operating as Router 1
operating as Router 1
Figure 29. Diffserv for VoIP in Router 1
The example is shown as CLI commands and as a web interface procedure.
CLI: Configure DiffServ for VoIP
1.
Enter Global configuration mode. Set queue 5 on all ports to use strict priority mode.
This queue will be used for all VoIP packets. Activate DiffServ for the switch.
This queue will 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