Reference Guide

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 (0 to 7).
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 to 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
pfc-max-buffer-size
Configures the maximum buffer size for the priority flow-control enabled flows.
Syntax
pfc-max-buffer-size max-buffer-size
Parameters max-buffer-size — Enter the maximum buffer size in KB.
Default None
Command Mode SYSTEM-QOS
Usage
Information
This command configures maximum size of the lossless buffer pool.. The no version of this command
removes the maximum buffer size limit.
Example
OS10(config-sys-qos)# pfc-max-buffer-size 2000
Supported
Releases
10.4.0E(R1) or later
pfc-shared-buffer-size
Changes the shared buffers size limit for priority flow-control enabled flows.
Syntax
pfc-shared-buffer-size buffer-size
Parameters buffer-size — Enter the size of the priority flow-control buffer in KB (0 to 8911).
Default 832 KB
654 Quality of service