Users Guide

pause
Configures the ingress buffer size and buffer threshold limit for pause and resume operations.
Syntax
pause [buffer-size kilobytes pause-threshold kilobytes resume-threshold
kilobytes]
Parameters
● buffer-size kilobytes — Enter the reserved (guaranteed) ingress-buffer size in kilobytes for
PFC dot1p traffic, from 0 to 7787.
● pause-threshold kilobytes — Enter the buffer threshold limit (in kilobytes) to send pause
frames to a transmitting device to temporarily halt the data transmission, from 0 to 7787.
● resume-threshold kilobytes — Enter the threshold limit (in kilobytes) at which a request is
sent to the transmitting device to resume sending traffic, from 0 to 7787.
Defaults
The default ingress-buffer size reserved for PFC traffic classes, and the pause and resume thresholds
vary according to the interface type. The default egress buffer that is reserved for PFC traffic classes is
0 on all interface types.
Table 93. Port defaults
Port Speed 10G Port 25G Port 40G Port 50G Port 100G Port
PFC reserved
ingress buffer
45 KB 54 KB 93 KB 111 KB 178 KB
PFC pause
threshold
9 KB 9 KB 18 KB 18 KB 36 KB
PFC resume
threshold
9 KB 9 KB 9 KB 9 KB 9 KB
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. 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 resume-
threshold 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
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