Deployment Guide

services, such as le transfers. You can congure the amount of buer space to be allocated for each priority and
the pause or resume thresholds for the buer. This method of conguration enables you to eectively manage and
administer the behavior of lossless queues.
Example
Dell(conf)#dcb pfc-queues 4
dcb {ets | pfc} enable
Enable priority ow control or enhanced transmission selection on interface.
Syntax
dcb {ets | pfc} enable
• To disable ETS on interface, use “no dcb ets enable” command.
• To disable PFC on interface, use “no dcb pfc enable” command.
Defaults Enable
Command Modes INTERFACE
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.3 (0.1) Introduced on S6000, S4810, and S4820T.
Usage Information
PFC and ETS are enabled by default on the interfaces when DCB is globally enabled (refer to dcb enable). In some
network topology, you may want to disable PFC on an interface and apply link level ow control; Similarly you may
want to disable ETS on an interface and apply QoS bandwidth congurations.
Limitations
• “dcb-map” CLI on interface is mutually exclusive to “no dcb ets enable” and “no dcb pfc enable”.
• “pfc priority” CLI is mutually exclusive to “no dcb pfc enable” command.
• Deprecated CLI “dcb-policy input” and “no dcb pfc enable” cannot coexist at interface level.
• Deprecated CLI “dcb-policy output” and “no dcb ets enable” cannot coexist at interface level.
service-class
buer shared-threshold-weight
Create a service class and associate the threshold weight of the shared buer with each of the queues per port in the egress direction.
Syntax
[No] Service-class buffer shared-threshold-weight {[queue0 number] || [queue1
number] || [queue2 number] || [queue3 number] || [queue4 number] || [queue5
number] || [queue6 number] || [queue7 number]}
Parameters
buer Dene the shared buer settings.
shared-threshold-
weight
Specify the weight of a queue for the shared buer space.
queue 0 to queue 7 To apply the shared-threshold weight, specify the queue number .
432 Data Center Bridging (DCB)