Dell S4148U-ON OS10 Enterprise Edition User Guide Release 10.4.0E R2 - Page 618
Con PFC, Converged data center services
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trust dot1p exit 2 Apply the qos trust policy to ingress traffic in SYSTEM-QOS or INTERFACE mode. service-policy input type qos trust-policy-map-name Configure a non-default dot1p-priority-to-traffic class mapping 1 Configure a trust map of dot1p traffic classes in CONFIGURATION mode. A trust map does not modify ingress dot1p values in output flows. Assign a qos-group to trusted dot1p values in TRUST mode using 1-to-1 mappings. Dot1p priorities are 0-7. For a PFC traffic class, map only one dot1p value to a qos-group number; for Broadcom-based NPU platforms, the qos-group number and the dot1p value must be the same. A qos-group number is used only internally to classify ingress traffic classes. trust dot1p-map dot1p-map-name qos-group {0-7} dot1p {0-7} exit 2 Apply the trust dot1p-map policy to ingress traffic in SYSTEM-QOS or INTERFACE mode. trust-map dot1p trust-policy-map-name Configure traffic-class-queue mapping Decide if you want to use the default traffic-class-queue mapping or configure a non-default traffic-class-to-queue mapping. Traffic Class : 0 1 2 3 4 5 6 7 Queue : 0 1 2 3 4 5 6 7 If you are using the default traffic-class-to-queue map, no further configuration steps are necessary. 1 Create a traffic-class-to-queue map in CONFIGURATION mode. Assign a traffic class (qos-group) to a queue in QOS-MAP mode using 1-to-1 mappings. For a PFC traffic class, map only one qos-group value to a queue number. A qos-group number is used only internally to classify ingress traffic. qos-map traffic-class tc-queue-map-name queue {0-7} qos-group {0-7} exit 2 Apply the traffic-class-queue map in SYSTEM-QOS or INTERFACE mode. qos-map traffic-class tc-queue-map-name View interface PFC configuration OS10# show interface priority-flow-control Configure PFC Priority flow control (PFC) provides a pause mechanism based on the 802.1p priorities in ingress traffic. PFC prevents frame loss due to network congestion. Configure PFC lossless buffers, and enable pause frames for dot1p traffic on a per-interface basis. Repeat the PFC configuration on each PFC-enabled interface. PFC is disabled by default. Decide if you want to use the default dot1p-priority-to-traffic class mapping and the default traffic-class-to-queue mapping. See PFC configuration notes to change the default settings. Configuration steps: 1 Create PFC dot1p traffic classes. 2 Configure ingress buffers for PFC traffic. 3 Apply a service policy and enable PFC. 4 (Optional) Configure the PFC shared buffer for lossless traffic. Create PFC dot1p traffic classes 618 Converged data center services
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