Dell N3200-ON Networking N-Series Switches CLI Reference Guide version 6.8.0 - Page 759

Command Mode Global Configuration mode or Interface Configuration (gigabitethernet, port-channel, tengigabitethernet, fortygigabitethernet) mode User Guidelines This command changes the scheduling policy for packet transmission of the selected CoS queues. It does not change the packet buffering policy nor does it reserve packet buffers to a CoS queue. The maximum number of queues supported per interface is seven. It is recommended that the operator avoid the use of queue 5-7 to avoid conflicts with inter- and intra-network control traffic. In order to better accommodate bursty traffic, it is recommended that the sum of the configured min-bandwidths be much less than 100%. Configuring the minimum bandwidths such that they sum to 100% effectively locks the scheduler such that bandwidth sharing by lower priority queues cannot be accommodated under congestion conditions. Example The following example displays how to specify the minimum transmission bandwidth guarantee for cos-queues 0 through 6 as follows: Cos Queue 0-5% scheduler capacity CoS Queue 1-5% scheduler capacity CoS Queue 2-10% scheduler capacity CoS Queue 3-10% scheduler capacity CoS Queue 4-7-Shared scheduler capacity. console(config)#cos-queue min-bandwidth 5 5 10 10 0 0 0 cos-queue random-detect Use the cos-queue random-detect command in Global Configuration or Interface Configuration mode to enable WRED queue management policy on an interface CoS queue. Use the no form of the command to disable WRED policy for a CoS queue on an interface. NOTE: On the N1500 Series switches, this command enables Simple RED since the hardware is not capable of Weighted RED. Layer 2 Switching Commands 759