LLDP exchanges information of the local system and its direct peers in the network through link-local communication. The local systems information of the peers is represented in the remote systems data structure. Figure A-5 shows an example for this connection between two different OPC UA Servers and their representation of the LLDP information. The RemoteSystemsData contains the information of the corresponding LocalSystemsData and PortInformation. For simplicity, this figure does not present all possible variables.

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Figure A-5 – Topology Discovery via LLDP