Reference Guide

478 Quality of Service
Mapping CoS Priorities to Queues Using CLI Commands
The following table summarizes the CLI commands for configuring fields in
the CoS to Queue
page.
The following is an example of the CLI commands:
The following is an example of the CLI commands:
DSCP to Queue
The DSCP to Queue mapping determines the egress queues of the incoming
IP packets, based on their DSCP values. The original VPT (VLAN Priority
Tag) of the packet is unchanged.
By changing the DSCP to Queue mapping, the Queue schedule method, and
bandwidth allocation, it is possible to achieve improved quality of service in a
network.
Non-IP packets are always classified to the best-effort queue.
The DSCP to Queue mapping is applicable to IP packets when:
• The switch is in Basic mode and DSCP is the trusted mode.
• The switch is in Advanced mode and the packets belongs to flows that are
DSCP trusted
To map DSCP to queues:
1
Click Quality of Service > General > DSCP to Queue in the tree view to
display the
DSCP to Queue page.
The DSCP values in the incoming packet and its associated queues are
displayed.
Table 22-4. CoS to Queue CLI Commands
CLI Command Description
wrr-queue cos-map queue-id
cos0 ... cos7
no wrr-queue cos-map [queue-
id]
Maps CoS values to the egress queues.
Use the no form of this command to
restore the default configuration.
console(config)# wrr-queue cos-map 4 7
console(config)# wrr-queue cos-map 4 7