Dell PowerConnect 3348 User's Guide - Page 338

www.dell.com | support.dell.com CoS Value Forwarding Queue Values 7 q3 CoS to Queue Mapping Table Default Values CoS mapping is enabled on a per-system basis. The CoS value order is from zero to seven, where zero is the lowest priority and seven is the highest. DSCP values can be mapped to priority queues. The DSCP to Queue Mapping Table Default Values Table contains the default DSCP mapping to forwarding queue values: DSCP to Queue Mapping Table Default Values DSCP Value Forwarding Queue Values 0-7 q1 (Lowest Priority) 8-15 q1 16-23 q2 24-31 q2 32-39 q2 40-47 q3 48-55 q3 55-63 q3 (Highest Priority) DSCP mapping is enabled on a per-system basis. QoS Services After packets are assigned to a specific queue, QoS services can be assigned to the queue(s). Output queues are configured with a scheduling scheme by one of the following methods: • Strict Priority-Ensures that time-sensitive applications are always forwarded via an expedited path. Strict priority allows network administrators to prioritize missioncritical, time-sensitive traffic over less time-sensitive applications. For example, under strict priority, voice-over-IP traffic is forwarded before FTP or e-mail (SMTP) traffic. The strict priority queue is emptied before the traffic in the remaining queues is forwarded. 338 Configuring Quality of Ser vice