Dell C9010 Modular Chassis Switch EMC Networking Command-Line Reference Guide - Page 1412

service-pool wred Configure a global buffer pool that serves as a shared buffer accessed by multiple queues when the minimum guaranteed buffers for a queue are consumed. The switch supports four global service-pools in the egress direction. Two service pools are used-one for lossy queues and the other for lossless (priority-based flow control (PFC)) queues. You can enable WRED and ECN operation on the global servicepools. You can define WRED profiles and weight on each of the global service-pools for both lossy and lossless (PFC) servicepools. C9000 Series Syntax Parameters [no] buffer-pool wred {green | weight | yellow} {[pool0 number/string] || [pool1 number/string]} buffer-pool wred green weight yellow pool0 pool1 number string Define the mapping between the service class and policy-based QoS or routing. Specify WRED curve parameters for a queue. Specify green (low) drop precedence to a queue. Specify a weight factor to a queue Specify yellow (medium) drop precedence to a queue Service-pool buffer 1 (default service-pool for PFC traffic) Service-pool buffer 0 (default service-pool for lossy traffic) 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. 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. 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 CONFIGURATION 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 S6000 and Z9000 platforms. Usage Information Example You can configure only service pools 0 and 1 because the Dell Networking OS uses only these two service pools. The service0 pool is used for lossy queues; the service1 pool is used for lossless (PFC) queues on all platforms. You can configure the weight for the WRED average queue size on service1 pool on which PFC is supported; service0 pool does not support PFC. A WRED profile contains a set of attributes, such as the minimum and maximum threshold values, and the maximum drop rate for the received packets. You can add or remove WRED parameter configurations for one or more shared service pools using a single command. The buffer-pool wred command is similar in usage and working to the service-class bandwidth-percentage queue-id command. 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 1412 Quality of Service (QoS)