DELL N3000 사용자 설명서

Configuring Data Center Bridging Features

Operator configuration of PFC is used only when the port is configured in a 

manual role. When interoperating with other equipment in a manual role, 

the peer equipment must be configured with identical PFC priorities and 

VLAN assignments. Interfaces not enabled for PFC ignore received PFC 

frames. Ports configured in auto-upstream or auto-downstream roles receive 

their PFC configuration from the configuration source and ignore any 

manually configured information. 
When using links in a port-channel, PFC must be configured on all of the 

individual links in the port-channel, as it operates on a link-local basis.

When PFC is disabled, the interface defaults to the IEEE 802.3 Annex 31B 

flow control setting for the interface. PFC is disabled by default.
If you enable priority-based flow control for a particular priority value on an 

interface, ensure that VLAN tagging is enabled on the interface so that the 

802.1p priority values are carried through the network (see "VLAN Tagging" 

on page 649). Additionally, make sure that 802.1p priority values are mapped 

to CoS values (see "Configuring Class-of-Service" on page 1313). If DCBX is 

enabled, the manually configured PFC parameters (no-drop priorities) must 

match the peers PFC parameters. If they do not match, PFC will not be 

operationally enabled and the port will continue to operate in the configured 

legacy flow control mode (IEEE 802.3 Annex 31B mode or none).
PFC can be configured using the web interface and the command line 

interface.

This section provides information about the OpenManage Switch 

Administrator pages to use to view and configure PFC on N4000 series 

switches. For details about the fields on a page, click 

at the top of the 

page.

This feature is configurable on physical full duplex interfaces only. To 

enable PFC on a LAG interface, the member interfaces must have the same 

configuration.