Dell S4148U-ON OS10 Enterprise Edition User Guide Release 10.4.0E R2 - Page 623

Example 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 Parameter Default Command Mode Usage Information Example pfc-shared-buffer-size kilobytes kilobytes - Enter the total amount of shared buffers available to PFC-enabled dot1p traffic in kilobytes (0 to 7787). 832KB SYSTEM-QOS 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). 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 and link-layer flow control (LLFC) at the same time on an interface. The no version of this command disables PFC on an interface. When you disable PFC, remove the PFC network-qos policy-class map applied to the interface. Example OS10(conf-if-eth1/1/1)# priority-flow-control mode on Converged data center services 623