lldpd
should already be running. You can check if
it discovered any neighbor by using lldpctl
command-line tool.
For more information, have a look at the following manual pages:
lldpd(8)
lldpcli(8)
If you want to modify the way lldpd
is invoked, you
have to
modify /Library/LaunchDaemons/im.bernat.lldpd.plist
.