Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.1P1 - Page 736
Enabling Buffer Statistics Tracking
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Page 736 highlights
Dell(conf-class-map)#match ipdscp 5 3 Configure an IP VLAN ID as a match criterion. CLASS-MAP mode Dell(conf-class-map)#match ip vlan 5 4 Create a QoS input policy. CONFIGURATION mode Dell(conf)#qos-policy-input pp_qospolicy 5 Configure the DSCP value to be set on matched packets. QOS-POLICY-IN mode Dell(conf-qos-policy-in)#set ip-dscp 5 6 Create an input policy map. CONFIGURATION mode Dell(conf)#policy-map-input pp_policmap 7 Create a service queue to associate the class map and QoS policy map. POLICY-MAP mode Dell(conf-policy-map-in)#service-queue 0 class-map pp_classmap qos-policy pp_qospolicy Enabling Buffer Statistics Tracking You can enable the tracking of statistical values of buffer spaces at a global level. The buffer statistics tracking utility operates in the max use count mode that enables the collection of maximum values of counters. To configure the buffer statistics tracking utility, perform the following step: 1 Enable the buffer statistics tracking utility and enter the Buffer Statistics Snapshot configuration mode. CONFIGURATION mode Dell(conf)#buffer-stats-snapshot Dell(conf)#no disable Enable this utility to be able to configure the parameters for buffer statistics tracking. By default, buffer statistics tracking is disabled. 2 Enable the buffer statistics tracking utility and enter the Buffer Statistics Snapshot configuration mode. CONFIGURATION mode Dell(conf)#buffer-stats-snapshot Dell(conf)#no disable Enable this utility to be able to configure the parameters for buffer statistics tracking. By default, buffer statistics tracking is disabled. 3 To view the buffer statistics tracking resource information depending on the type of buffer information, such as device-level details, queue-based snapshots, or priority group-level snapshot in the egress and ingress direction of traffic, use show hardware stackunit buffer-stats-snapshot unit resource x EXEC/EXEC Privilege mode Dell#show hardware stack-unit 1 buffer-stats-snapshot unit 3 resource interface all queue mcast 3 Unit 1 unit: 3 port: 1 (interface Fo 1/144 736 Quality of Service (QoS)
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