Users Guide

Parameters
• buffer-size kilobytes — Enter the reserved (guaranteed) ingress-buer size in kilobytes for PFC
dot1p trac (0 to 7787).
• pause-threshold kilobytes — Enter the threshold used to send pause frames in kilobytes to a
transmitting device (0 to 7787).
•
resume-threshold kilobytes — Enter the threshold used to request a transmitting device in kilobytes
to resume sending trac (0 to 7787).
Defaults
The default ingress-buer size reserved for PFC trac classes, and the pause and resume thresholds vary
according to the interface type. The default egress buer reserved for PFC trac classes is 0 on all interface
types.
Table 4. Port defaults
Port Speed 10G Port 25G Port 40G Port 100G Port
PFC reserved ingress
buer
166 KB 195 KB 315.5 KB 512 KB
PFC pause threshold 96 KB 96 KB 192 KB 232 KB
PFC resume threshold 87 KB 87 KB 183 KB 223 KB
Command Mode POLICY-CLASS NETWORK-QOS
Usage Information Use the pause command without optional parameters to apply the default ingress-buer 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
Congures 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 trac class (1 to 7), a hyphen-separated
range, or multiple dot1p values separated by commas.
Default Not congured
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 (trac class) numbers in the network-qos class map used to dene the PFC trac class (see
Congure PFC Example). A qos-group number is used only internally to classify ingress trac classes. See PFC
conguration notes for the default dot1p-priority-to-trac-class mapping and how to congure a non-default
mapping. A PFC trac class requires a 1-to-1 mapping — only one dot1p value is mapped to a qos-group
number.
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