Dell C9010 Modular Chassis Switch EMC Networking Command-Line Reference Guide - Page 1411

service-class wred backplane After you create a WRED profile with ECN functionality, specify per-queue granularity for backplane ports and include the WRED profile in a service class. Using this command, you can enable or disable queue-specific settings and specify minimum and maximum buffer thresholds in the WRED profile applied to each packet color-code. Also, you can specify the maximum drop rate percentage for yellow and green profiles. The per-queue profile configured is applied to all the backplane ports. C9000 Series Syntax Parameters [no] service-class wred {green | weight | yellow} {[queue0 number/string] || [queue1 number/string] || [queue2 number/string] || [queue3 number/ string] || [queue4 number/string] || [queue5 number/string] || [queue6 number/string] || [queue7 number/string]} backplane service-class Define the mapping between the service class and policy-based QoS or routing. wred Specify WRED curve parameters for a queue green Specify green (low) drop precedence to a queue. weight Specify a weight factor to a queue. yellow Specify yellow (medium) drop precedence to a queue. queue 0 to queue Specify the queue number to which the WRED parameters apply. 7 number Enter a weight for the queue as a number in the range of 1 to 15. This parameter applies only if you specify the green or yellow drop precedence. string Enter the WRED profile name. It is a string of up to 32 characters. Or use one of the five pre-defined WRED profile names. Pre-defined Profiles: wred_drop, wredge_y, wred_ge_g, wred_teng_y, wred_teng_. This parameter applies only if you specify a weight factor. backplane Specify that the WRED weight and profile configured for each queue apply to backplane ports. Default All queues on backplane ports operate in tail-drop (best-effort traffic) mode by default. There is no default WRED green or yellow profile. The default weight is 0. Command Modes QOS-POLICY-OUT mode Command History Version 9.9(0.0) Description Introduced on the C9010. 9.2.1.0 Introduced on the Z9500 switch. 9.3.0.0 Introduced on the Z9000 platform. Usage Information Example You can configure queues 0-7. WRED profile contains a set of characteristics, such as the minimum and maximum WRED thresholds and the maximum drop rate. You can add and remove WRED parameters for one or more queues by using the command in a single line. All of the configured attributes apply to all the backplane ports and are for each queue. To assign drop precedence to green or yellow traffic, use this command. If there is no honoring enabled on the input, all the traffic defaults to green drop precedence. Dell(conf-wred)#wred thresh-1 Dell(conf-wred)#threshold min 100 max 200 max-drop-rate 40 Dell(conf-wred)#wred thresh-2 Dell(conf-wred)#threshold min 300 max 400 max-drop-rate 80 Dell(conf)#service-class wred green queue5 thresh-1 queue7 thresh-2 backplane Dell(conf)#service-class wred yellow queue1 thresh-2 queue3 thresh-1 backplane Dell(conf)#service-class wred weight queue0 11 queue6 4 queue7 9 backplane Quality of Service (QoS) 1411