Dell PowerConnect 8100 User's Configuration Guide - Page 839

CAUTION: Sharing of bandwidth among CoS Queues is disabled if the sum of the minimum bandwidth settings equals 100%. console(config-if-Te1/0/1)#cos-queue min-bandwidth 20 35 35 10 0 0 0 4. Configure the Scheduler Mode for the CoS Queues This step enables strict priority scheduling on one or more CoS queues (traffic classes). Strict priority scheduling ensures that packets assigned to a higher CoS queue number are serviced before packets assigned to lower CoS queue numbers. The strict priority setting does not restrict frame ingress. Use the 'no' command to disable strict priority mode scheduling. It is recommended that all queues enabled for strict priority scheduling be assigned to a single strict-priority-enabled TCG other than TCG0. The following example sets CoS queue (traffic class) number 3 to be serviced with strict priority: console(config-if-Te1/0/1)#cos-queue strict 3 To show the minimum bandwidth and scheduler modes for CoS queues, use the following command. console#show interfaces cos-queue tengigabitethernet 1/0/1 Interface Te1/0/1 Interface Shaping Rate 0 kbps WRED Decay Exponent 9 Queue Id -------0 1 2 3 4 5 6 Min. Bandwidth 20 35 35 10 0 0 0 Scheduler Type Weighted Weighted Weighted Strict Weighted Weighted Weighted Queue Management Type Tail Drop Tail Drop Tail Drop Tail Drop Tail Drop Tail Drop Tail Drop 5. Map the CoS Queues to TCGs In this step, CoS queues are mapped to Traffic Class Groups (TCGs). Since TCGs are serviced from highest numbered TCG to lowest, higher priority traffic should be assigned to higher numbered TCGs. In general, strict Configuring Data Center Bridging Features 839