How to obtain an ethernet mac address?

The Inverse Address Resolution Protocol, also known as Inverse ARP or InARP, is a protocol used for obtaining Layer 3 addresses (e.g. IP addresses) of other stations from Layer 2 addresses (e.g. the DLCI in Frame Relay networks). It is primarily used in Frame Relay and ATM networks, where Layer 2 addresses of virtual circuits are sometimes obtained from Layer 2 signalling, and the corresponding Layer 3 addresses must be available before these virtual circuits can be used..