Dell PowerConnect 8100 CLI Reference Guide - Page 933
Datacenter-Bridging Config mode, is operationally disabled. Because PFC is a link local protocol
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Page 933 highlights
Parameter Description Parameter on off Description Enable PFC on the interface. Disable PFC on the interface. 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 Priority Flow Control Commands 933
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