Cisco WS-C3560E-48PD-SF Command Reference - Page 303

Chapter 2 Catalyst 3560 Switch Cisco IOS Commands mls qos srr-queue output dscp-map Usage Guidelines The drop-threshold percentage for threshold 3 is predefined. It is set to the queue-full state. Note The egress queue default settings are suitable for most situations. You should change them only when you have a thorough understanding of the egress queues and if these settings do not meet your QoS solution. You can assign two weighted tail-drop (WTD) threshold percentages to an egress queue by using the mls qos queue-set output qset-id threshold global configuration command. You can map each DSCP value to a different queue and threshold combination, allowing the frame to follow different behavior. You can map up to eight DSCP values per command. Examples This example shows how to map a port to queue-set 1. It maps DSCP values 0 to 3 to egress queue 1 and to threshold ID 1. It configures the drop thresholds for queue 1 to 50 and 70 percent of the allocated memory, guarantees (reserves) 100 percent of the allocated memory, and configures 200 percent as the maximum memory that this queue can have before packets are dropped. Switch(config)# mls qos srr-queue output dscp-map queue 1 threshold 1 0 1 2 3 Switch(config)# mls qos queue-set output 1 threshold 1 50 70 100 200 Switch(config)# interface gigabitethernet0/1 Switch(config-if)# queue-set 1 You can verify your settings by entering the show mls qos maps, the show mls qos interface [interface-id] buffers, or the show mls qos queue-set privileged EXEC command. Related Commands Command mls qos srr-queue output cos-map mls qos queue-set output threshold queue-set show mls qos interface buffers show mls qos maps show mls qos queue-set Description Maps class of service (CoS) values to an egress queue or maps CoS values to a queue and to a threshold ID. Configures the WTD thresholds, guarantees the availability of buffers, and configures the maximum memory allocation to a queue-set. Maps a port to a queue-set. Displays quality of service (QoS) information. Displays QoS mapping information. Displays egress queue settings for the queue-set. 78-16405-05 Catalyst 3560 Switch Command Reference 2-271