Provided by: lldpad_1.1-1_amd64 bug


       lldpad - Link Layer Discovery Protocol (LLDP) agent daemon


       lldpad [-h] [-v] [-V level] [-d] [-k] [-p] [-s] [-t] [-f filename]


       Executes  the  LLDP protocol for supported network interfaces.  The list of TLVs currently
       supported are:

       -      IEEE 802.1AB Mandatory TLVs

       -      IEEE 802.1AB Basic Management TLVs

       -      IEEE 802.3 Organizationally Specific TLVs

       -      LLDP-MED Organizationally Specific TLVs

       -      Data Center Bridging capabilities exchange protocol (DCBX) TLVs

       -      Edge Virtual Bridging (EVB) TLVs

       Capabilities of lldpad include:

       -      Transmission of LLDP PDUs containing enabled TLVs from enabled ports.

       -      Reception of LLDP PDUs from enabled ports.

       -      Operation of the DCBX protocol for  interfaces  which  support  the  DCB  rtnetlink
              interface.   This  includes  operation  of  the  DCBX state machines above LLDP and
              corresponding configuration  of  the  DCB  parameters  of  the  network  interface.
              Supported  DCB features are: Extended Transmission Selection, Priority Flow Control
              and the FCoE application.

       -      Configuring the DCB settings of the network driver based on the operation of DCBX.

       -      Provides a multi-channel interface for client applications to query  and  configure
              features.   Events  are also generated on the client interface to inform clients of
              changes.  The lldpad package includes two clients:  lldptool for general LLDP agent
              management and dcbtool for DCB management.

       lldpad  supports  the  versions of the DCB capabilities exchange (DCBX) protocol listed as

       version 1 - also known as CIN DCBX

       version 2 - also known as CEE DCBX

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

       IEEE  DCBX  is  the  default  DCBX  mode  for  a  DCB capable interface so 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.

       See dcbtool for information on how to globally configure  which  legacy  version  of  DCBX
       lldpad executes.

       See lldptool for information on how to reset the DCBX mode of an interface back to default
       (starts out in IEEE DCBX mode).

       lldpad also supports edge virtual bridging as currently under specification  in  the  IEEE
       802.1Qb working group.  <>


       lldpad has the following command line options:

       -h     show usage information

       -f filename
              use  the  specified  file  as  the  configuration file instead of the default file:
              /var/lib/lldpad/lldpad.conf lldpad expects the directory of the configuration  file
              to   exist,  but  if  the  configuration  file  does  not  exist,  then  a  default
              configuration file will be created.  lldpad creates and maintains the  contents  of
              the  configuration  file.   Configuration  should be performed by using lldptool or

       -d     run lldpad as a daemon

       -v     show lldpad version

       -V level
              set lldpad debugging level. Uses syslog debug levels see syslog.2 for details.

       -k     used to terminate the first instance of lldpad that was started (e.g. from initrd).
              Once  lldpad  -k  has  been  invoked  and  lldpad  has  been  restarted, subsequent
              invocations of lldpad -k will not terminate lldpad.

       -s     remove lldpad state records from shared memory

       -p     do not create PID file /var/run/ on startup

       -t     omit timestamps from logging messages


       On termination, lldpad does not undo any of the  configurations  that  it  has  set.  This
       approach  minimizes  the risk of restarting the daemon to perform a software update, or of
       having storage issues during shutdown. Ongoing operation of network  interfaces  that  had
       been controlled by lldpad may result in unexpected behavior.


       dcbtool(8),  lldptool(8),  lldptool-dcbx(8),  lldptool-ets(8),  lldptool-pfc(8), lldptool-
       app(8), lldptool-med(8), lldptool-vdp(8), lldptool-evb(8)


       lldpad - LLDP agent daemon with DCBX support
       Copyright(c) 2007-2012 Intel Corporation.   Portions of lldpad  are based on:


              (c) 2004-2008, Jouni Malinen <>


       This program is free software; you can redistribute it and/or modify it  under  the  terms
       and  conditions  of  the  GNU  General Public License, version 2, as published by the Free
       Software Foundation.

       This program is distributed in the hope it will  be  useful,  but  WITHOUT  ANY  WARRANTY;
       without  even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
       See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program;
       if not, write to the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor, Boston,
       MA 02110-1301 USA.

       The full GNU General Public License is included in this distribution in  the  file  called


       Contact Information: open-lldp Mailing List <>

                                          March 23, 2012                                lldpad(8)