Command Line Interface Guide

Priority Flow Control Commands 947
Parameter Description
Default Configuration
Priority-flow-control mode is off (disabled) by default.
Command Mode
Datacenter-Bridging Config mode
User Guidelines
PFC must be enabled before FIP snooping can operate over the interface. Use
the no form of the command to return the mode to the default (off). VLAN
tagging (trunk or general mode) must be enabled on the interface in order to
carry the dot1p value through the network. Additionally, the dot1mapping to
class-of-service must be set to one-to-one.
When PFC is enabled on an interface, the normal PAUSE control mechanism
is operationally disabled.
Example
The following example enables PFC on an interface.
s1(config)#interface te1/0/1
s1(config-if-Te1/0/1)#datacenter-bridging
s1(config-if-dcb)#priority-flow-control mode on
priority-flow-control priority
Use the priority-flow-control priority command in Datacenter-Bridging
Config mode to enable the priority group for lossless (no-drop) or lossy (drop)
behavior on the selected interface. Up to two lossless priorities can be enabled
on an interface.
Parameter Description
on Enable PFC on the interface.
off Disable PFC on the interface.
2CSPC4.X8100-SWUM100.book Page 947 Wednesday, August 29, 2012 6:23 PM