Data Center Bridging eXchange (DCBX) is a protocol used by DCB
devices to exchange configuration information with directly
connected peers. The Linux DCBX object is a 1-byte bitfield of
flags that configure whether DCBX is implemented in the device or
in the host, and which version of the protocol should be used.
dcb dcbx is used to access the per-port Linux DCBX object.
There are two principal modes of operation: in host mode, DCBX
protocol is implemented by the host LLDP agent, and the DCB
interfaces are used to propagate the negotiate parameters to
capable devices. In lld-managed mode, the configuration is
handled by the device, and DCB interfaces are used for inspection
of negotiated parameters, and can also be used to set initial
When used with dcb dcbx set, the following keywords enable the
corresponding configuration. The keywords that are not mentioned
on the command line are considered disabled. When used with show,
each enabled feature is shown by its corresponding keyword.
The device is in the host mode of operation and,
respectively, the lld-managed mode of operation, as
described above. In principle these two keywords are
mutually exclusive, but dcb dcbx allows setting both and
lets the driver handle it as appropriate.
ceeieee The device supports CEE (Converged Enhanced Ethernet) and,
respecively, IEEE version of the DCB specification.
Typically only one of these will be set, but dcb dcbx does
not mandate this.
static indicates the engine supports static configuration. No
actual negotiation is performed, negotiated parameters are
always the initial configuration.
Report any bugs to the Network Developers mailing list
<firstname.lastname@example.org> where the development and maintenance is
primarily done. You do not have to be subscribed to the list to
send a message there.
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TCP/IP networking and traffic) project. Information about the
project can be found at
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iproute2 13 December 2020 DCB-DCBX(8)