
from http://vincentbernat.github.com/lldpd/

    LLDP allows you to know exactly on which port is a server
    (and reciprocally).

    LLDP is an industry standard protocol designed to supplant proprietary
    Link-Layer protocols such as EDP or CDP. The goal of LLDP is to provide
    an inter-vendor compatible mechanism to deliver Link-Layer notifications
    to adjacent network devices.

    lldpd is an ISC-licensed implementation of LLDP for various Unixes.
    It also supports some proprietary protocols.
