.Dd May 27, 2007
.Dt lldpd 8
.Sh NAME
.Nm lldpd
.Nd Send Link Layer Discovery Protocol packets over ethernet.
.Sh SYNOPSIS
.Nm lldpd
.Op Fl c
.Op Fl i Ar interface
.Op Fl d 
.Op Fl f 
.Op Fl s 
.Sh DESCRIPTION
The 
.Nm
utiliy used to generate Link Layer Discovery Protocol packets and
send them over ethernet.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl c 
Use the config file <path> instead of the default.
.It Fl i Ar interface
set interface, over that packets will be sent
.It Fl d 
Set debug verbosity

<debug_level> can be any of : 
       A : Enable ALL debug flags.
       c : Enable CONFIG debug flag.
       s : Enable STATE debug flag.
       t : Enable TLV debug flag.
       i : Enable INT debug flag.
       n : Enable SNMP debug flag.
       x : Enable EXCESSIVE debug flag.
.It Fl f
Run in forground mode
.It Fl s
Remove the existing control socket if found (Should only be used in system init scripts!)
.El
.Sh DIAGNOSTICS
When everything is ok, 
and 
.Nm
program is started with (default) daemon mode, it justs
daemonises with return code 0. 
In case of errors they are printed to stderr and program exists
with non-zero status. Most errors caused by the fact that
the 
.Nm
needs access to /dev/bpf*, so it must be started by root, and
Berkeley Packet Filter must be enabled in kernel (by adding 
.Sy pseudo-device bpf
into kernel configuration).
.Sh SEE ALSO
.Sy http://www.lldp.org/
for information about Link Layer Discovery Protocol.
.Sy http://www.tcpdump.org/
- tcpdump home page.
.Sh AUTHOR
OpenLLDP
http://openlldp.sourceforge.net/