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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).
Configuring DCBx
To configure DCBx, follow these steps.
For DCBx, to advertise DCBx TLVs to peers, enable LLDP. For more information, refer to Link Layer
Discovery Protocol (LLDP).
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
[no] protocol lldp
3. Configure the DCBx version used on the interface, where: auto configures 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: configures the port to use CEE (Intel 1.01).
• cin: configures the port to use Cisco-Intel-Nuova (DCBx 1.0).
• ieee-v2.5: configures the port to use IEEE 802.1Qaz (Draft 2.5).
The default is Auto.
4. Configure 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: configures the port to receive a peer configuration. The configuration source is
elected from auto-upstream ports.
• auto-downstream: configures the port to accept the internally propagated DCB configuration
from a configuration source.
• config-source: configures the port to serve as the configuration source on the switch.
• manual: configures the port to operate only on administer-configured DCB parameters. The port
does not accept a DCB configuration received from a peer or a local configuration source.
The default is Manual.
5. On manual ports only: Configure the PFC and ETS TLVs advertised to DCBx peers.
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Data Center Bridging (DCB)