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Data Center Bridging Commands 869
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Data Center Bridging Commands
NOTE: Fiber Channel over Ethernet (FCoE) commands are only supported on the PC8024
and PC8024F switches. CLI commands and Dell OpenManage Switch Administrator
pages are not available for other switch models.
NOTE: Enhanced Transmission Selection commands are only supported on PC81xx series
switches. CLI commands and Dell OpenManage Switch Administrator pages are
not available for other switch models.
Data Center Bridging Exchange Protocol
The Data Center Bridging Exchange Protocol (DCBX) is used by DCB
devices to exchange configuration information with directly connected peers.
The protocol is also used to detect misconfiguration of the peer DCB devices
and, optionally, for configuration of peer DCB devices.
DCBX is expected to be deployed in support of lossless operation for FCoE or
iSCSI traffic. In these scenarios, all network elements are DCBX-enabled
(DCBX is enabled end-to-end).
The PowerConnect implementation of the DCBX protocol supports the
propagation of configuration information for the following features:
1
Enhanced Transmission Selection (ETS)
2
Priority-based Flow Control (PFC)
3
Application Priorities
The features listed above use DCBX to send and receive device configuration
and capability information and configuration details to peer DCBX devices.
The PFC and ETS information exchange is discussed in
Priority Flow Control
Commands
and
Enhanced Transmission Selection
. Application Priority
information is captured from the configuration source and propagated to
other auto-configuration peers by the DCBX component. When iSCSI is
enabled on an operationally active PFC port, the application priority
information is supplemented with the configured iSCSI priority.
2CSPC4.X8100-SWUM102.book Page 869 Friday, March 15, 2013 8:56 AM