Users Guide

Data Center Bridging (DCB)

Topics:

• Enabling Data Center Bridging

• Ethernet Enhancements in Data Center Bridging

• QoS dot1p Traffic Classification and Queue Assignment

• SNMP Support for PFC and Buffer Statistics Tracking

• DCB Maps and its Attributes

• Data Center Bridging: Default Configuration

• Configuration Notes: PFC and ETS in a DCB Map

• Configuring Priority-Based Flow Control

• Configuring Enhanced Transmission Selection

• Configure a DCBx Operation

• Verifying the DCB Configuration

• Performing PFC Using DSCP Bits Instead of 802.1p Bits

• PFC and ETS Configuration Examples

• Using PFC and ETS to Manage Data Center Traffic

• Priority-Based Flow Control Using Dynamic Buffer Method

• Configuring the Dynamic Buffer Method

Enabling Data Center Bridging

Data center bridging supports converged enhanced Ethernet (CEE) in a data center network. By default, DCB

is disabled. It must be enabled to support CEE.

NOTE

: DCB is not supported on the Port Extender (PE) ports and cascade ports. For information about PE

ports, see Interface Types and Port Extenders.

• Priority-based flow control

• Enhanced transmission selection

• Data center bridging exchange protocol

• FCoE initialization protocol (FIP) snooping

DCB processes virtual local area network (VLAN)-tagged packets and dot1p priority values. Untagged packets

are treated with a dot1p priority of 0.

To enable DCB, enter the following command.

Enable DCB.

CONFIGURATION mode

Data Center Bridging (DCB) 290