Users Guide

DCBX configuration notes
● DCBX is a prerequisite for using DCB features, such as PFC and ETS, to exchange link-level configurations in a converged
network.
● DCBX, when deployed in topologies, enables lossless operation for FCoE or iSCSI traffic. In these scenarios, all network
devices in the topology must have DCBX-enabled.
● DCBX uses LLDP to advertise and automatically negotiate the administrative state and PFC or ETS configuration with
directly connected DCB peers. DCBX cannot run if LLDP is disabled on an interface. Enable LLDP on all the DCBX port. For
more information about LLDP, see Link Layer Discovery Protocol.
● By default, DCBX is disabled globally. Enable DCBX globally on a switch to activate the exchange of DCBX TLV messages
with PFC, ETS, and iSCSI configurations.
● By default, DCBX is enabled on the physical interfaces except on the management interface.
● You can manually reconfigure DCBX settings on an individual interface. For example, you can disable DCBX on an interface
using the no lldp tlv-select dcbxp command or change the DCBX version using the dcbx version command.
● For DCBX to be operational, DCBX must be enabled both globally and on the interface. If the show lldp dcbx
interface command returns the message DCBX feature not enabled, DCBX is not enabled at both levels.
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Converged data center services