On the MXL switch, PFC and ETS use DCBx to exchange link-level configuration with DCBx peer devices.
Figure 31. DCBx Sample Topology
DCBx Prerequisites and Restrictions
The following prerequisites and restrictions apply when you configure DCBx operation on a port:
• For DCBx, on a port interface, enable LLDP in both Send (TX) and Receive (RX) mode (the protocol
lldp mode command; refer to the example in CONFIGURATION versus INTERFACE Configurations
in the Link Layer Discovery Protocol (LLDP) chapter). If multiple DCBx peer ports are detected on a
local DCBx interface, LLDP is shut down.
• The CIN version of DCBx supports only PFC, ETS, and FCOE; it does not support iSCSI, backward
congestion management (BCN), logical link down (LLDF), and network interface virtualization (NIV).
278 Data Center Bridging (DCB)