Quality of Service
QoS Advanced Mode
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STEP 4 Click Apply. The QoS policy profile is added, and the Running Configuration file is
updated.
Policy Class Maps
One or more class maps can be added to a policy. A class map defines the type of
packets that are considered to belong to the same traffic flow.
NOTE You cannot configure a policer to a class map when the device is operating in
Layer3 mode. The device supports policers only in Layer 2 mode.
To add a class map to a policy:
STEP 1 Click Quality of Service > QoS Advanced Mode > Policy Class Maps.
STEP 2 Select a policy in the Filter, and click Go. All class maps in that policy are
displayed.
STEP 3 To add a new class map, click Add.
STEP 4 Enter the parameters.
•Policy Name—Displays the policy to which the class map is being added.
•Class Map Name—Select an existing class map to be associated with the
policy. Class maps are created in the Class Mapping page.
•Action Type—Select the action regarding the ingress CoS/802.1p and/or
DSCP value of all the matching packets.
-

Use default trust mode

—Ignore the ingress CoS/802.1p and/or DSCP
value. The matching packets are sent as best effort.
-

Always Trust

—If this option is selected, the device trusts the CoS/802.1p
and DSCP of the matching packet. If a packet is an IP packet, the device
puts the packet in the egress queue based on its DSCP value and the
DSCP to Queue Table. Otherwise, the egress queue of the packet is
based on the packet's CoS/802.1p value and the CoS/802.1p to Queue
Table.
-

Set

—If this option is selected, use the value entered in the New Value box
to determine the egress queue of the matching packets as follows: