Dell PowerSwitch S4128F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 1281

Command Mode POLICY-CLASS NETWORK-QOS Usage Information Use the pause command without optional parameters to apply the default ingress-buffer size, and pause (XON) and resume (XOFF) thresholds. Default values for the buffer-size, pause-threshold and resumethreshold parameters vary across interface types and port speeds. The default values are based on the default MTU size of 9216 bytes. Use the optional queue-limit thresh-mode command to change the number of shared buffers available to PFC traffic-class queues in the policy-class-map. Example OS10(config)# policy-map type network-qos pp1 OS10(conf-pmap-network-qos)# class cc1 OS10(conf-pmap-c-nqos)# pause buffer-size 30 pause-threshold 20 resumethreshold 10 Supported Releases 10.3.0E or later pfc-cos Configures the matching dot1p values that are used to send PFC pause frames. Syntax pfc-cos dot1p-priority Parameters dot1p-priority - Enter the dot1p priority value for a PFC traffic class, from 1 to 7. Use a comma (,) to separate multiple values or a hyphen ( - ) to specify a range of values; for example, 0, 3, 7, or 3-6. Default Not configured Command Mode POLICY-CLASS NETWORK-QOS Usage Information 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 that is used to define the PFC traffic class, see Configure PFC Example. A qos-group number is used only internally to classify ingress traffic classes. For the default dot1p-priority-to-traffic-class mapping and how to configure a nondefault mapping, see PFC configuration notes. A PFC traffic class requires a 1-to-1 mapping - only one dot1p value is mapped to a qos-group number. Example 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 number 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, from 0 to 7787. Default 832KB Command Mode SYSTEM-QOS Usage Information By default, the lossy ingress buffer handles all ingress traffic. 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 that is allowed for PFC-enabled flows. The configured number of shared buffers is reserved for PFC flows only after you enable PFC on an interface using the priority-flow-control mode on command. Converged data center services 1281