DCBX uses LLDP (Link Layer Discovery Protocol) to advertise DCB (Data Center Bridging) capabilities to DCB peers.
Use the following commands to enable LLDP and the DCBX feature on switch ports:
enable lldp ports [all | port_list] {receive-only | transmit-only}
configure lldp ports [all | port_list] [advertise | no-advertise] vendor-specific dcbx {ieee|baseline}