Dell PowerSwitch S4112F-ON OS10 Enterprise Edition User Guide Release 10.4.0ER - Page 635

Default Command Mode Usage Information Example Not configured POLICY-CLASS NETWORK-QOS When you enter PFC-enabled dot1p priorities with pfc-cos, the dot1p values must be the same as the match qos-group (traffic class) numbers in the network-qos class map used to define the PFC traffic class (see Configure PFC Example). A qos-group number is used only internally to classify ingress traffic classes. See PFC configuration notes for the default dot1p-priority-to-traffic-class mapping and how to configure a non-default mapping. A PFC traffic class requires a 1-to-1 mapping - only one dot1p value is mapped to a qos-group number. OS10(config)# class-map type network-qos cc1 OS10(conf-cmap-nqos)# match qos-group 3 OS10(conf-cmap-nqos)# exit Example (policymap) OS10(config)# policy-map type network-qos pp1 OS10(conf-pmap-network-qos)# class cc1 OS10(conf-pmap-c-nqos)# pfc-cos 3 Supported Releases 10.3.0E or later pfc-shared-buffer-size Configures the amount of shared buffers available for PFC-enabled traffic on the switch. Syntax pfc-shared-buffer-size kilobytes Parameter kilobytes - Enter the total amount of shared buffers available to PFC-enabled dot1p traffic in kilobytes (0 to 7787). Default 832KB Command Mode SYSTEM-QOS Usage Information By default, all ingress traffic is handled by the lossy ingress buffer. When you enable PFC, dot1p ingress traffic competes for shared buffers in the lossless pool instead of the shared lossy pool. Use this command to increase or decrease the shared buffer allowed for PFC-enabled flows. The configured amount of shared buffers is reserved for PFC flows only after you enable PFC on an interface (priority-flow-control mode on command). Example OS10(config)# system qos OS10(conf-sys-qos)# pause-shared-buffer-size 1024 Supported Releases 10.3.0E or later priority-flow-control Enables PFC on ingress interfaces. Syntax priority-flow-control {mode on} Parameter mode on - Enable PFC for FCoE and iSCSI traffic on an interface without enabling DCBX. Default Disabled Command Mode INTERFACE Usage Information Before you enable PFC, apply a network-qos policy-class map with the specific PFC dot1p priority values to the interface. In the PFC network-qos policy-class map, use the default buffer-size values if you are not sure about the pause-threshold, and resume-threshold settings that you want to use. You cannot enable PFC Converged data center services 635