router lsa's link ID Identifies the object that this router link connects to. Value depends on the link's Type. When connecting to an object that also originates an LSA (i.e., another router or a transit network) the Link ID is equal to the neighboring LSA's Link State ID. This provides the key for looking up the neighboring LSA in the link state database during the routing table calculation. See Section 12.2 for more details. Type Link ID ________________________________________ 1 Neighboring router's Router ID 2 IP address of Designated Router 3 IP network/subnet number 4 Neighboring router's Router ID