draft-eastlake-lldp-mac
MAC Address for Layer 3 Link Local Discovery Protocol (LLDP)
IEEE 802 has defined a number of protocols which can operate between
adjacent Ethernet stations at Layer 2, including bridges, and may be
useful between Layer 3 aware stations such as IP routers and hosts.
An example is the Link Layer Discover Protocol (IEEE Std 802.1AB,
LLDP). This document specifies a MAC address that can be used for
this purpose for interoperability despite intervening bridges.