dcb-dcbx(8) - man - phpman

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 configura‐
       tion 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 ver‐
       sion of the protocol should be used.  dcb dcbx is used to access the per-port Linux DCBX ob‐
       ject.

       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 ca‐
       pable devices. In lld-managed mode, the configuration is handled by the device, and DCB in‐
       terfaces are used for inspection of negotiated parameters, and can also be used to set ini‐
       tial parameters.


PARAMETERS
       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.


       host
       lld-managed
              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.


       cee
       ieee   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 per‐
              formed, negotiated parameters are always the initial configuration.


EXAMPLE & USAGE
       Put the DCB engine into the "host" mode of operation, and use IEEE-standardized DCB inter‐
       faces:


       # 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 <netdev AT vger.org> where the de‐
       velopment 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)