Reference Guide

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
resume-threshold parameters vary across interface types and port speeds. The default values are
based on the default MTU size of 9216 bytes.
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 resume-
threshold 10
Supported
Releases
10.3.0E or later
pfc-cos
Configures the matching dot1p values used to send PFC pause frames.
Syntax
pfc-cos dot1p-priority
Parameters dot1p-priority — Enter a single dot1p priority value for a PFC traffic class (1 to 7), a hyphen-
separated range, or multiple dot1p values separated by commas.
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 used to define the PFC traffic
class (see 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.
Example
OS10(config)# class-map type network-qos cc1
OS10(conf-cmap-nqos)# match qos-group 3
OS10(conf-cmap-nqos)# exit
Example (policy-
map)
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
pfc-shared-buffer-size kilobytes
Parameter kilobytes — Enter the total amount of shared buffers available to PFC-enabled dot1p traffic in
kilobytes (0 to 7787).
Default 832KB
Command Mode SYSTEM-QOS
Usage
Information
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).
Converged data center services 711