Accton Technology 24/48 10/100 Ports + 2GE Management Manual

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Accton Technology 24/48 10/100 Ports + 2GE Management Manual Manual pdf 443 page image

Priority Commands4-2014Command ModeGlobal ConfigurationCommand UsageWRR controls bandwidth sharing at the egress port by defining schedulingweights.ExampleThis example shows how to assign WRR weights to priority queues 1 - 3:Related Commandsshow queue bandwidth (4-202)queue cos-mapThis command assigns class of service (CoS) values to the priority queues (i.e.,hardware output queues 0 - 3). Use the no form set the CoS map to the defaultvalues.Syntaxqueue cos-map queue_id [cos1 ... cosn]no queue cos-map• queue_id - The ID of the priority queue.Ranges are 0 to 3, where 3 is the highest priority queue.• cos1 .. cosn - The CoS values that are mapped to the queue ID. It is aspace-separated list of numbers. The CoS value is a number from 0 to 7,where 7 is the highest priority.Default SettingThis switch supports Class of Service by using four priority queues, withWeighted Round Robin queuing for each port. Eight separate traffic classesare defined in IEEE 802.1p. The default priority levels are assigned accordingto recommendations in the IEEE 802.1p standard as shown below.Command ModeInterface Configuration (Ethernet, Port Channel)Console(config)#queue bandwidth 6 9 12Console(config)#Table 4-64 Default CoS Priority LevelsQueue 0 1 2 3Priority 1, 2 0, 3 4, 5 6, 7