The disclosure provides a realization method for enabling a Link Layer Discovery Protocol (LLDP) function on a non-Ethernet link, which includes: starting LLDP global enabling on a network device at an end and a network device at an opposite end respectively; starting LLDP port enabling on a non-Ethernet interface of the network device at the end and a non-Ethernet interface of the network device at the opposite end respectively. The disclosure further provides a realization system for enabling an LLDP function on a non-Ethernet link, correspondingly. The disclosure extends and improves the physical interface scope supported by an LLDP, and achieves the purpose of enabling the LLDP neighbour discovery function on the non-Ethernet link such as a POS interface by means of supporting usage of the LLDP on the interface such as the POS interface.