LLDP (Link Layer Discovery Protocol) is used to exchange information such as interface MAC addresses or system descriptions with directly connected neighbor devices. Each interface sends and receives information separately. For example, the local interface eth1 only sends information about itself to neighbors to which the local device on this interface is connected. The same applies to receiving. Information is exchanged only with immediate neighbors and can be used to assist in cabling devices, for example.
The following sections provide more detailed information about LLDP.
