Network Topology Discovery Technology in Smart Substation

Topology discovery technology is the basis of realizing the management of communication network management in smart substation, and the working principle and working flow of LLDP are described in detail, and its features make it suitable for smart substation network. Through reading the lldpRem Table in switches, all the switch nodes in the whole network can be deeply searched. According this method, a specific implementation case is given. By reading the MAC address table of switch, the connection position of the terminal device on the switch is acquired, also the solution of the incompleteness and aging of the MAC address table is provided. Then, an entire network topology containing every switch port can be constructed.