Connectivity Guide

• A DCBX-enabled port operates in a manual role by default. The port operates only with user-congured settings and does not auto-
congure with DCB settings received from a DCBX peer. When you enable DCBX, the port advertises its PFC and ETS congurations
to peer devices but does not accept external, or propagate internal, DCB congurations.
• DCBX detects misconguration on a peer device when DCB features are not compatibly congured with the local switch.
Misconguration detection is feature-specic because some DCB features support asymmetric (non-identical) congurations.
Congure DCBX
DCBX allows data center devices to advertise and exchange conguration settings with directly connected peers using LLDP. LLDP is
enabled by default.
To ensure the consistent and ecient operation of a converged data center network, DCBX detects peer misconguration.
DCBX is disabled at a global level and enabled at an interface level by default. For DCBX to be operational, DCBX must be enabled at both
the global and interface levels. You can manually recongure DCBX settings or disable DCBX on a per-interface basis.
1 Congure the DCBX version used on a port in INTERFACE mode.
dcbx version {auto | cee | ieee}
• auto — Automatically selects the DCBX version based on the peer response, the default.
• cee — Sets the DCBX version to CEE.
• ieee — Sets the DCBX version to IEEE 802.1Qaz.
2 (Optional) A DCBX-enabled port advertises all TLVs by default. If PFC or ETS TLVs are disabled, enter the command in INTERFACE
mode to re-enable PFC or ETS TLV advertisements.
dcbx tlv-select {ets-conf | ets-reco | pfc}
• ets-conf — Enables ETS conguration TLVs.
• ets-reco — Enables ETS recommendation TLVs.
• pfc — Enables PFC TLVs.
3 (Optional) DCBX is enabled on a port by default. If DCBX is disabled, enable it in INTERFACE mode.
lldp tlv-select dcbxp
4 Return to CONFIGURATION mode.
exit
5 Enable DCBX on all switch ports in CONFIGURATION mode to activate the exchange of DCBX TLV messages with PFC, ETS, and
iSCSI congurations.
dcbx enable
Congure DCBX
View DCBX conguration
OS10# show lldp dcbx interface ethernet 1/1/15
E-ETS Configuration TLV enabled e-ETS Configuration TLV disabled
R-ETS Recommendation TLV enabled r-ETS Recommendation TLV disabled
P-PFC Configuration TLV enabled p-PFC Configuration TLV disabled
F-Application priority for FCOE enabled f-Application Priority for FCOE disabled
I-Application priority for iSCSI enabled i-Application Priority for iSCSI disabled
------------------------------------------------------------------------------------------
Interface ethernet1/1/15
Port Role is Manual
DCBX Operational Status is Enabled
Is Configuration Source? FALSE
Local DCBX Compatibility mode is CEE
Local DCBX Configured mode is CEE
Peer Operating version is CEE
Local DCBX TLVs Transmitted: ErPfI
Local DCBX Status
Converged data center services
885