NAME

       DCBX - Show / manipulate DCBX configuration

SYNOPSIS

       lldptool -t -i ethx -V IEEE-DCBX -c [mode]

       lldptool -T -i ethx -V IEEE-DCBX mode=reset

       lldptool -t -i ethx -V <CIN-DCBX|CEE-DCBX> -c [enableTx]

       lldptool -T -i ethx -V <CIN-DCBX|CEE-DCBX> enableTx=<yes|no>

DESCRIPTION - DCBX MODE

       lldpad supports the following versions of the DCB capabilities exchange (DCBX) protocol:

       CIN DCBX
              <http://download.intel.com/technology/eedc/dcb_cep_spec.pdf>

       CEE DCBX
              <http://www.ieee802.org/1/files/public/docs2008/az-wadekar-dcbx-capability-exchange-discovery-
              protocol-1108-v1.01.pdf>

       IEEE DCBX
              See the IEEE 802.1Qaz-2011 specification for details."

       IEEE DCBX is the default DCBX mode for a DCB capable interface. Therefore the default and configured IEEE
       DCBX  TLVs will be transmitted when the interface comes up.  lldpad can be globally configured to support
       one of the legacy DCBX versions (CIN or CEE).  If the remote LLDP agent does not transmit any  IEEE  DCBX
       TLVs  and does transmit a legacy DCBX TLV which matches the configured legacy DCBX version, then the DCBX
       mode will drop back to legacy DCBX mode.  It will not transition back to IEEE DCBX mode  until  the  next
       link  reset.   If  lldpad  has  dropped  back to legacy DCBX mode for a given interface and the daemon is
       stopped and restarted, the legacy DCBX mode for that interface will be used instead of  starting  out  in
       IEEE  DCBX  mode.  This behavior only applies to the case where lldpad is restarted and is not persistent
       across a system reboot.

       The DCBX mode can be queried and configured by using the special tlvid IEEE-DCBX.  There is not an actual
       TLV  which  corresponds  to this tlvid.  Its use is to query and reset the IEEE DCBX mode.  When queried,
       IEEE DCBX mode can take the following values:

       auto - IEEE DCBX will be used (initially) if lldpad is restarted.  An exception is if the DCBX  mode  has
       been  forced  to  a legacy DCBX mode, then the specified legacy mode will be used.  See information about
       the 'dcbx' parameter in dcbtool(8) for more information about this exception."

       CEE - CEE DCBX will be used if lldpad is restarted

       CIN - CIN DCBX will be used if lldpad is restarted

       The IEEE DCBX mode can be reset to auto by setting the mode argument to the value reset

DESCRIPTION - DCBX CONFIGURATION

       The detailed configuration of the IEEE DCBX TLVs can be found in related lldptool man pages for each IEEE
       DCBX TLV (see lldptool-pfc(8), lldptool-ets(8) and lldptool-app(8)).

       The  detailed  configuration  of  the  CIN and CEE DCBX TLVs is performed using dcbtool (see dcbtool(8)).
       However, lldptool can configure the enableTx parameter of the CIN and CEE DCBX TLVs (as it can with  most
       other  TLVs).   Since  lldpad  only  transmits  TLVs  for one version of DCBX on any given interface, the
       enableTx parameter for the CIN and CEE DCBX TLVs (and for the IEEE DCBX feature TLVs) takes  effect  only
       when the corresponding DCBX version is active.

ARGUMENTS

       mode=reset
              Reset the DCBX mode that will be used if lldpad is restarted by setting the mode argument to reset
              using the special tlvid IEEE-DCBX.

       enableTx
              Enable the specified DCBX TLV (CIN-DCBX or CEE-DCBX) to be transmitted in the LLDPDU if that  DCBX
              mode for the specified interface has been selected.

EXAMPLE & USAGE

       Query the current DCBX mode that will be used if lldpad is restarted. (this is not a persistent setting)
              lldptool -t -i eth3 -V IEEE-DCBX -c mode

       Reset the DCBX mode to be 'auto' (start in IEEE DCBX mode) after the next lldpad restart
              lldptool -T -i eth3 -V IEEE-DCBX mode=reset

       Enable transmission of the CEE DCBX TLV
              lldptool -T -i eth3 -V CEE-DCBX enableTx=yes

       Disable transmission of the CIN DCBX TLV
              lldptool -T -i eth3 -V CIN-DCBX enableTx=no

       Query the configuration of enableTx for the CEE DCBX TLV
              lldptool -t -i eth3 -V CEE-DCBX -c enableTx

NOTES

SEE ALSO

       dcbtool(8), lldptool(8), lldptool-ets(8), lldptool-pfc(8), lldptool-app(8), lldpad(8)

AUTHOR

       Eric Multanen