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 switch is operating in Layer 3 mode. The switch supports policers only in Layer 2 mode.
To add a class map to a policy:
- Click Quality of Service > QoS Advanced Mode > Policy Class Maps (Layer 3). The Policy Class Maps (Layer 3) page opens.
- Select a policy in the Filter, and click Go. All class maps in that policy are displayed.
- To add a new class map, click Add. The Add Policy Class Map page opens.
- 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 switch will trust the CoS/802.1p and DSCP of the matching packet. If a packet is an IP packet, the switch will put 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:
If the new value (0..7) is a CoS/802.1p priority, use the priority value and the CoS/802.1p to Queue Table to determine the egress queue of all the matching packets.
If the new value (0..63) is a DSCP, use the new DSCP and the DSCP to Queue Table to determine the egress queue of the matching IP packets.
Otherwise, use the new value (1..4) as the egress queue number for all the matching packets.
- Police Type--Available in Layer 2 Mode only. Select the policer type for the policy. The options are:
- Aggregate Policer--Available in Layer 2 Mode only. If Police Type is Aggregate, select a previously-defined (in the Aggregate Policer page) aggregate policer.
If Police Type is Single, enter the following QoS parameters:
- Ingress Committed Information Rate (CIR)--Enter the CIR in Kbps. See description in the Bandwidth page.
- Ingress Committed Burst Size (CBS)--Enter the CBS in bytes. See description in the Bandwidth page.
- Exceed Action--Select the action assigned to incoming packets exceeding the CIR. The options are:
- Click Apply.