Dell S4148U-ON OS10 Enterprise Edition User Guide Release 10.4.0E R2 - Page 619
Optional Repeat Steps 2-4
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1 Create a network-qos class map to classify PFC traffic classes in CONFIGURATION mode (0 to 7). Specify the traffic classes using the match qos-group command. Qos-groups map 1:1 to traffic classes 0 to 7 (qos-group 1 corresponds to traffic class 1). Enter a single value, a hyphen-separated range, or multiple qos-group values separated by commas in CLASS-MAP mode. class-map type network-qos class-map-name match qos-group {0-7} exit 2 (Optional) Repeat Step 1 to configure additional PFC traffic-class class-maps. Configure pause and ingress buffers for PFC traffic See PFC configuration notes for the default ingress queue settings and the default dot1p priority-queue mapping. 1 Create a network-qos policy map in CONFIGURATION mode. policy-map type network-qos policy-map-name 2 Associate the policy-map with a network-qos class map in POLICY-MAP mode. class class-map-name 3 Configure default values for ingress buffers used for the network-qos class maps in POLICY-CLASS-MAP mode. pause (Optional) Change the default values for the ingress-buffer size reserved for the network-qos class-map traffic and the thresholds used to send XOFF and XON pause frames (in kilobytes). pause [buffer-size kilobytes {pause-threshold kilobytes | resume-threshold kilobytes}] 4 Enable the PFC pause function for dot1p traffic in POLICY-CLASS-MAP mode. The dot1p values must be the same as the qosgroup (traffic class) numbers in the class map in Step 2. Enter a single dot1p value (0-7), a hyphen-separated range, or multiple dot1p values separated by commas. pfc-cos dot1p-priority 5 (Optional) Set the static and dynamic thresholds used to limit the shared buffers allocated to PFC traffic-class queues. Configure a static, fixed queue-limit (in kilobytes) or a dynamic threshold (weight 1-10; default 9) based on the available PFC shared buffers. queue-limit thresh-mode {static kilobytes | dynamic weight} 6 (Optional) Repeat Steps 2-4 to configure PFC on additional traffic classes. Apply service policy and enable PFC 1 Apply the PFC service policy on an ingress interface or interface range in INTERFACE mode. interface ethernet node/slot/port:[subport] service-policy input type network-qos policy-map-name interface range ethernet node/slot/port:[subport]-node/slot/port[:subport] service-policy input type network-qos policy-map-name 2 Enable PFC (without DCBX) for FCoE and iSCSI traffic in INTERFACE mode. priority-flow-control mode on Configure PFC shared buffer Configure the total amount of shared buffers available to PFC-enabled interfaces on the switch in SYSTEM-QOS mode (0 to 7787 kilobytes; default 832). pfc-shared-buffer-size kilobytes Configure PFC PFC is enabled on traffic classes with dot1p 3 and 4 traffic. The two traffic classes require different ingress queue processing. In the network-qos pp1 policy map, class cc1 uses customized PFC buffer size and pause frame settings; class cc2 uses the default settings. In the pclass1 policy map, the class-trust class enables interfaces to honor dot1p or DSCP traffic. OS10(config)# policy-map pclass1 OS10(config-pmap-c-qos)# class-map class-trust OS10(config-pmap-c-qos)# trust dot1p OS10(config-pmap-c-qos)# exit Converged data center services 619