Setup Guide
DCBx Prerequisites and Restrictions
The following prerequisites and restrictions apply when you congure 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 Congurations 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).
Conguring DCBx
To congure DCBx, follow these steps.
For DCBx, to advertise DCBx TLVs to peers, enable LLDP. For more information, see Link Layer Discovery Protocol (LLDP).
Congure DCBx operation at the interface level on a switch or globally on the switch.
1 Congure ToR- and FCF-facing interfaces as auto-upstream ports.
2 Congure server-facing interfaces as auto-downstream ports.
3 Congure a port to operate in a conguration-source role.
4 Congure ports to operate in a manual role.
NOTE
: The DCBx conguration is not supported on cascade interfaces or extended ports
1 Enter INTERFACE Conguration mode.
CONFIGURATION mode
interface type slot/port
2 Enter LLDP Conguration mode to enable DCBx operation.
INTERFACE mode
[no] protocol lldp
3 Congure the DCBx version used on the interface, where: auto congures the port to operate using the DCBx version received from
a peer.
PROTOCOL LLDP mode
[no] DCBx version {auto | cee | cin | ieee-v2.5}
• cee: congures the port to use CEE (Intel 1.01).
• cin: congures the port to use Cisco-Intel-Nuova (DCBx 1.0).
• ieee-v2.5: congures the port to use IEEE 802.1Qaz (Draft 2.5).
The default is Auto.
4 Congure the DCBx port role the interface uses to exchange DCB information.
PROTOCOL LLDP mode
[no] DCBx port-role {config-source | auto-downstream | auto-upstream | manual}
• auto-upstream: congures the port to receive a peer conguration. The conguration source is elected from auto-upstream
ports.
• auto-downstream: congures the port to accept the internally propagated DCB conguration from a conguration source.
• config-source: congures the port to serve as the conguration source on the switch.
Data Center Bridging (DCB)
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