# dcb-dcbx - show / manipulate port DCBX (Data Center Bridging eXch... - man(8) - [phpMan]

[_DCB-DCBX_(8)](https://www.chedong.com/phpMan.php/man/DCB-DCBX/8/markdown)                                     Linux                                    [_DCB-DCBX_(8)](https://www.chedong.com/phpMan.php/man/DCB-DCBX/8/markdown)

## 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, 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 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)](https://www.chedong.com/phpMan.php/man/dcb/8/markdown)


## REPORTING BUGS
       Report any bugs to the Network Developers mailing list **<<netdev@vger.kernel.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@pmachata.org>>

iproute2                                  13 December 2020                               [_DCB-DCBX_(8)](https://www.chedong.com/phpMan.php/man/DCB-DCBX/8/markdown)