Priority Flow Control Commands 933
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. Ports that are configured to use the
DCBX auto-configuration roles (auto-up or auto-down) have their PFC
settings overridden. Only ports configured as DCBX manual role utilize the
configured PFC settings.
When PFC is enabled on an interface, the normal PAUSE control mechanism
is operationally disabled. Because PFC is a link local protocol, it must be
configured on all the interfaces aggregated in a port channel. Only
configuring some of the ports in a port channel to use PFC will cause
unexpected results and is not supported.
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
Parameter Description
on Enable PFC on the interface.
off Disable PFC on the interface.
2CSPC4.X8100-SWUM102.book Page 933 Friday, March 15, 2013 8:56 AM