Owner's Manual

382 | Chapter 15. QoS
NETGEAR 8800 User Manual
Enabling and Disabling Diffserv Examination
When a packet arrives at the switch on an ingress port and Diffserv examination is enabled,
the switch uses the DSCP value to select the egress QoS profile that forwards the packet.
The QoS profile configuration defines the forwarding characteristics for all traffic assigned to
the QoS profile.
Note: On the 1 Gigabit Ethernet ports on the NETGEAR 8800 switches.
802.1p replacement always happens when you configure the
DiffServ traffic grouping.
The DiffServ examination feature is disabled by default. To enable DiffServ examination, use
the following command:
enable diffserv examination ports [<port_list> | all]
Note: When DiffServ examination is enabled on 1 Gigabit Ethernet ports
for NETGEAR 8800 switches, 802.1p replacement is enabled and
cannot be disabled. The ingress 802.1p value is replaced with the
802.1p value assigned to the egress QoS profile.
To disable DiffServ examination, use the following command:
disable diffserv examination ports [<port_list> | all]
Changing the DSCP to QOS Profile Mapping
You can change the egress QoS profile assignment for each of the 64 code points.
To view the current DSCP to QoS profile mapping, use the following command:
show diffserv examination
On NETGEAR 8800 switches, use the following commands to change the DSCP to QoS
profile mapping:
configure diffserv examination code-point <code_point> {qosprofile}
<qosprofile>
unconfigure diffserv examination
After a QoS profile is assigned, the rest of the switches in the network prioritize the packet
using the characteristics specified by the QoS profile.