Dell PowerConnect 5548 User Guide - Page 652

Mapping CoS Priorities to Queues Using CLI Commands The following table summarizes the CLI commands for configuring fields in the CoS to Queue page . Table 22-4. CoS to Queue CLI Commands CLI Command wrr-queue cos-map queue-id cos1 ... cos8 no wrr-queue cos-map [queueid] Description Maps CoS values to the egress queues. Use the no form of this command to restore the default configuration. The following is an example of the CLI commands: console(config)# wrr-queue cos-map 4 7 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. 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 Non-IP packets are always classified to the best-effort queue. 652 Dell PowerConnect 55xx Systems User Guide