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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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DCBx Operation

The data center bridging exchange protocol (DCBx) is used by DCB devices to exchange configuration information with directly connected peers using the link layer discovery protocol (LLDP) protocol. DCBx can detect the misconfiguration of a peer DCB device, and optionally, configure peer DCB devices with DCB feature settings to ensure consistent operation in a data center network.

DCBx is a prerequisite for using DCB features, such as priority-based flow control (PFC) and enhanced traffic selection (ETS), to exchange link-level configurations in a converged Ethernet environment. DCBx is also deployed in topologies that support lossless operation for FCoE or iSCSI traffic. In these scenarios, all network devices are DCBx-enabled (DCBx is enabled end-to-end).

The following versions of DCBx are supported on an Aggregator: CIN, CEE, and IEEE2.5.

DCBx requires the LLDP to be enabled on all DCB devices.


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