Dcbx Prerequisites And Restrictions; Configuring Dcbx - Dell S4820T Configuration Manual

Figure 33. 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
in the Link Layer Discovery Protocol (LLDP)
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).

Configuring DCBx

To configure DCBx, follow these steps.
For DCBx, to advertise DCBx TLVs to peers, enable LLDP. For more information, refer to
Discovery Protocol (LLDP).
Configure DCBx operation at the interface level on a switch or globally on the switch. To configure the
S4820Tsystem for DCBx operation in a data center network, you must:
1. Configure ToR- and FCF-facing interfaces as auto-upstream ports.
2. Configure server-facing interfaces as auto-downstream ports.
3. Configure a port to operate in a configuration-source role.
4. Configure ports to operate in a manual role.
1. Enter INTERFACE Configuration mode.
CONFIGURATION mode
interface type slot/port
2. Enter LLDP Configuration mode to enable DCBx operation.
INTERFACE mode
290
CONFIGURATION versus INTERFACE Configurations
chapter). If multiple DCBx peer ports are detected on a
Link Layer
Data Center Bridging (DCB)