Data Center Bridging In A Traffic Flow; Enabling Data Center Bridging - Dell S6100 Configuration Manual

ETS parameters ETS Configuration TLV and ETS Recommendation TLV.

Data Center Bridging in a Traffic Flow

The following figure shows how DCB handles a traffic flow on an interface.
Figure 32. DCB PFC and ETS Traffic Handling

Enabling Data Center Bridging

DCB is automatically configured when you configure FCoE or iSCSI optimization.
Data center bridging supports converged enhanced Ethernet (CEE) in a data center network. DCB is disabled by default. It must be
enabled to support CEE.
• 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.
For DCB to operate effectively, you can classify ingress traffic according to its dot1p priority so that it maps to different data queues. The
dot1p-queue assignments used are shown in the following table.
To enable DCB, enable either the iSCSI optimization configuration or the FCoE configuration.
NOTE: Dell Networking OS Behavior: DCB is not supported if you enable link-level flow control on one or more interfaces. For
more information, refer to
250 Data Center Bridging (DCB)
Ethernet Pause Frames.