IEEE 802.1AB

Link Layer Discovery Protocol (LLDP, IEEE 802.1AB) The Link Layer Discovery Protocol (LLDP) is a vendor neutral layer 2 protocol that can be used by a station attached to a specific LAN segment to advertise its identity and capabilities and to also receive same from a physically adjacent layer 2 peer. History After several years of development LLDP was formally defined in May of 2005 as IEEE Std 802.1AB-2005. LLDP was developed as an open and extendable standard. It was modeled on and borrowed concepts from the numerous vendor proprietary discovery protocols such as Cisco Discovery Protocol