Reference Guide

292 | Data Center Bridging (DCB)
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You can apply a DCB output policy with ETS configuration to all stacked ports in a switch stack or an
individual stacked switch.In addition, you can apply different DCB output policies to different stack units.
Configuring 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 mis-configuration 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). For more information about how
these features are implemented and used, refer to:
• Configuring Priority-Based Flow Control
FTOS Behavior:
Entering the command removes all DCB input policies applied to stacked ports.
A
dcb-policy input stack-unit all command overwrites any previous dcb-policy input stack-unit
stack-unit-id configurations. Similarly, a dcb-policy input stack-unit stack-unit-id command overwrites any
previous
dcb-policy input stack-unit all configuration.
Entering the
no dcb-policy input stack-unit all command removes all DCB input policies applied to
stacked ports and resets PFC to its default settings. The
no dcb-policy input stack-unit stack-unit-id
command removes only the DCB input policy applied to the specified switch.
Task Command Command Mode
Apply the specified DCB output policy on
all ports of the switch stack or a stacked
switch.
dcb-policy output stack-unit {all |
stack-unit-id} stack-ports all
dcb-output-policy-name
CONFIGURATION
FTOS Behavior:
Entering the command removes all DCB input policies applied to stacked ports.
A
dcb-policy output stack-unit all command overwrites any previous dcb-policy output stack-unit
stack-unit-id configurations. Similarly, a dcb-policy output stack-unit stack-unit-id command overwrites
any previous
dcb-policy output stack-unit all configuration.
Entering the
no dcb-policy output stack-unit all command removes all DCB output policies applied to
stacked ports. The no
dcb-policy output stack-unit stack-unit-id command removes only the DCB output
policy applied to the specified switch.