Users Guide

Example
OS10(config)# system qos
OS10(conf-sys-qos)# pause-shared-buffer-size 1024
Supported
Releases
10.3.0E or later
priority-flow-control
Enables PFC on ingress interfaces.
Syntax
priority-flow-control {mode on}
Parameter mode on — Enable PFC for FCoE and iSCSI traffic on an interface without enabling DCBX.
Default Disabled
Command Mode INTERFACE
Usage Information Before you enable PFC, apply a network-qos policy-class map with the specific PFC dot1p priority values to the
interface. In the PFC network-qos policy-class map, use the default buffer-size values if you are not sure
about the pause-threshold and resume-threshold settings that you want to use. You cannot enable
PFC and LLFC simultaneously on an interface. The no version of this command disables PFC on an interface.
When you disable PFC, delete the PFC
network-qos policy-class map applied to the interface.
Example
OS10(conf-if-eth1/1/1)# priority-flow-control mode on
Supported
Releases
10.3.0E or later
queue-limit
Sets the static and dynamic thresholds that are used to limit the shared-buffer size of PFC traffic-class queues.
Syntax
queue-limit {thresh-mode [static kilobytes | dynamic weight]}
Parameters
• thresh-mode — Buffer threshold mode.
• static kilobytes — Enter the fixed shared-buffer limit available for PFC traffic-class queues in
kilobytes, from 0 to 7787; maximum amount tuned by the pfc-shared-buffer-size command.
• dynamic weight — Enter the weight value used to dynamically determine the shared-buffer limit available
for PFC traffic-class queues from 1 to 10.
Default Dynamic weight of 9 and static shared-buffer limit of 12,479,488 kilobytes.
Command Mode POLICY-CLASS NETWORK-QOS
Usage Information To tune the amount of shared buffers available for the static limit of PFC traffic-class queues on the switch, use
the pfc-shared-buffer-size command. The current amount of available shared buffers determines the
dynamic queue-limit.
Example
OS10(config)# policy-map type network-qos pp1
OS10(conf-pmap-network-qos)# class cc1
OS10(conf-pmap-c-nqos)# queue-limit thresh-mode static 1024
Supported
Releases
10.3.0E or later
show interface priority-flow-control
Displays PFC operational status, configuration, and statistics on an interface.
Syntax
show interface [ethernet node/slot/port[:subport]] priority-flow-control
[details]
Parameters
etherent node/slot/port[:subport]
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