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Dell SmartFabric OS10 User Guide Release 10.5.3

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pfc-cos

Configures priority flow-control for cost of service (CoS).

Syntax
pfc-cos cos-value
Parameters
cos-value — Enter a single, comma-delimited, or hyphenated range of CoS values for priority flow-control to enable, from 0 to 7.
NOTE: The range 0-7 is invalid. All other ranges, including 0-6 and 1-7 are valid.
Default
Not configured
Command Mode
POLICY-MAP-CLASS-MAP
Usage Information
To configure link-level flow-control, do not configure pfc-cos for the matched class for this policy. Add the policy-map with the pfc-cos configuration to system-qos to service an input to enable priority flow-control behavior on all ports, based on a per-port Priority Flow-Control Enable mode. Add the policy-map with the pfc-cos configuration to interface configurations to service at input and enable Priority Flow-Control on that particular port, based on the port's Priority Flow-Control Enable mode. If you configure 40G to 10G mode on interfaces and pause (no drop) is enabled on system-qos, all queues may or may not drop traffic based on the availability of buffers. The no version of this command returns the value to the default.
Example
OS10(conf-pmap-c-nqos)# pfc-cos 0-2
Example (global buffer/shared buffer)
OS10(config)# policy-map type network-qos nqGlobalpolicy1
OS10(conf-cmap-nqos)# class CLASS-NAME
OS10(conf-cmap-nqos-c)# pause buffer-size 45 pause-threshold 25 resume-threshold 10 
OS10(conf-cmap-nqos-c)# pfc-cos 0-2
OS10(conf-cmap-nqos-c)# queue-limit 140
Supported Releases
10.3.0E or later

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