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Configuring the DCBX Mode
You can configure the DCBX mode that an interface uses to communicate with the connected peer. QFX Systems support three DCBX modes:
- Autonegotiation—The interface negotiates with the connected peer to determine the DCBX mode. This is the default DCBX mode.
- IEEE DCBX—The interface uses IEEE DCBX type, length, and value (TLV) to exchange DCBX information with the connected peer. QFX3500 Node devices come up with IEEE DCBX enabled by default and then autonegotiate with the connected peer to determine the final DCBX mode.
- DCBX Version 1.01—The interface uses Converged Enhanced Ethernet (CEE) DCBX version 1.01 TLVs to exchange DCBX information with the connected peer. QFabric Node devices come up with DCBX version 1.01 enabled by default and then autonegotiate with the connected peer to determine the final DCBX mode.
 | Note: QFX Systems do not support pre-CEE (pre-DCB) versions of DCBX such as DCBX version 1.00. If a QFX Series interface receives an LLDP frame with pre-CEE DCBX TLVs, the system drops the frame. |
Configure the DCBX mode by specifying the mode for one interface or for all interfaces.
- To configure the DCBX mode, specify the interface and
the mode:
[edit protocols dcbx]
user@switch# set interface interface-name mode (auto-negotiate | ieee-dcbx | dcbx-version-1.01)For example, to configure DCBX version 1.01 on interface xe-0/0/21:
user@switch# set protocols dcbx interface xe-0/0/21 mode dcbx-version-1.01To configure IEEE DCBX on all interfaces:
user@switch# set protocols dcbx interface all mode ieee-dcbx
