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DCB-DCBX(8)                          Linux                         DCB-DCBX(8)
NAME
       dcb-dcbx - show / manipulate port DCBX (Data Center Bridging eXchange)
SYNOPSIS
       dcb [ OPTIONS ] dcbx { COMMAND | help }
       dcb dcbx show dev DEV
       dcb dcbx set dev DEV [ host ] [ lld-managed ] [ cee ] [ ieee ] [ static
               ]
DESCRIPTION
       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-man-
       aged mode, the configuration is handled by the device, and DCB inter-
       faces are used for inspection of negotiated parameters, and can also be
       used to set initial parameters.
PARAMETERS
       When used with dcb dcbx set, the following keywords enable the corre-
       sponding configuration. The keywords that are not mentioned on the com-
       mand line are considered disabled. When used with show, each enabled
       feature is shown by its corresponding keyword.
       host
       lld-managed
              The device is in the host mode of operation and, respectively,
              the lld-managed mode of operation, as described above. In prin-
              ciple these two keywords are mutually exclusive, but dcb dcbx
              allows setting both and lets the driver handle it as appropri-
              ate.
       cee
       ieee   The device supports CEE (Converged Enhanced Ethernet) and,
              respectively, 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.
EXAMPLE & USAGE
       Put the DCB engine into the "host" mode of operation, and use IEEE-
       standardized DCB interfaces:
       # dcb dcbx set dev eth0 host ieee
       Show what was set:
       # dcb dcbx show dev eth0
       host ieee
EXIT STATUS
       Exit status is 0 if command was successful or a positive integer upon
       failure.
SEE ALSO
       dcb(8)
REPORTING BUGS
       Report any bugs to the Network Developers mailing list <net-
       dev AT vger.org> where the development and maintenance is primarily
       done.  You do not have to be subscribed to the list to send a message
       there.
AUTHOR
       Petr Machata <me AT pmachata.org>
iproute2                       13 December 2020                    DCB-DCBX(8)