Reference Guide

Data Center Bridging (DCB) | 297
DCBx Example
Figure 13-8 shows how DCBx is used. The external 40GbE ports on the base module (ports 33 and 37) of
two switches are used for uplinks configured as DCBx auto-upstream ports. The S4810 is connected to
third-party, top-of-rack (ToR) switches through 40GbE uplinks. The ToR switches are part of a Fibre
Channel storage network.
• The internal ports (ports 1-32) connected to the 10GbE backplane are configured as auto-downstream
ports.
On the S4810, PFC and ETS use DCBx to exchange link-level configuration with DCBx peer devices.
Figure 13-8. DCBx Sample Topology