Reference 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 link-layer flow control (LLFC) at the same time on an interface. The
no version of this command disables PFC on an interface. When you disable PFC, remove 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 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 (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 (1 to 10).
Default Dynamic weight of 9 and static shared-buffer limit of 12479488 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 dynamic queue-limit is determined by the
current amount of available shared buffers.
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
712 Converged data center services