A [Neighbor] section accepts the following keys. The neighbor
       section adds a permanent, static entry to the neighbor table
       (IPv6) or ARP table (IPv4) for the given hardware address on the
       links matched for the network. Specify several [Neighbor]
       sections to configure several static neighbors.
       Address=
           The IP address of the neighbor.
       LinkLayerAddress=
           The link layer address (MAC address or IP address) of the
           neighbor.