AS5800-EC Series CLI Reference Guide R02

Chapter 22 | Data Center Bridging Commands
Priority-based Flow Control Commands
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pfc mode Use this command to sets the PFC mode to negotiate capability through DCBX or
by forcing it to on state. Use the no form to disable this feature.
Syntax
pfc mode {auto | on}
no pfc mode
auto – Negotiates PFC capability using DCBX. The operational capability of
PFC depends on the result of DCBX negotiations.
on – Forces PFC to enabled state
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
◆ Operator configuration of PFC is used only when the port is configured in DCBX
manual mode. When interoperating with other equipment in manual mode,
the peer equipment must be configured with identical PFC priorities and VLAN
assignments. Ports configured in auto-upstream or auto-downstream DCBX
roles receive their PFC configuration from the configuration source and ignore
any manually configured information. Interfaces not enabled for PFC ignore
received PFC frames.
◆ PFC is configurable on full duplex interfaces only. To enable PFC on a LAG, the
member interfaces must have the same configuration.
◆ When PFC is enabled on an interface, it will be automatically disabled for
IEEE 802.3 flow control. Any flow control frames received on a PFC enabled
interface are ignored. When PFC is disabled on an interface, it defaults to
IEEE 802.3 flow control.
Example
The following example sets port 5 to use PFC auto-negotiation mode.
Console(config)#interface ethernet 1/5
Console(config-if)#pfc mode auto
Console(config-if)#