Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.7 - Page 754

Strict priority scheduling is most useful when it is desirable that low-bit-rate time-sensitive traffic be queued ahead of other traffic. The administrator must be careful to limit the bandwidth assigned to the strict priority queue to avoid potential denial of service attacks. See the "Enterprise Voice VLAN Configuration With QoS" section in the Users Configuration Guide for a rate limiting example. If using the min-bandwidth command to reserve bandwidth on other queues, ensure that the total of the minimum bandwidths is less than 100% to allow the scheduler to handle bursts of traffic. Example The following example displays how to activate the strict priority scheduler mode for two queues. console(config)#cos-queue strict 1 2 The following example displays how to activate the strict priority scheduler mode for three queues (1, 2, and 4) and reserves a minimal amount of bandwidth on the other four internal CoS queues (0, 3, 5 and 6). console(config)#cos-queue strict 1 2 4 console(config)#cos-queue min-bandwidth 5 0 0 10 0 10 10 diffserv Use the diffserv command in Global Configuration mode to set the DiffServ operational mode to active. While disabled, the DiffServ configuration is retained and can be changed, but it is not operational. When enabled, DiffServ services are operational on queues configured for WRED. To set the DiffServ operational mode to inactive, use the no form of this command. NOTE: On the N1500 Series switches, enable Simple RED since the hardware is not capable of Weighted RED. Syntax diffserv no diffserv Default Configuration This command default is enabled. Layer 2 Switching Commands 754