This section explains the detailed processing of received Link State Request packets. Received Link State Request Packets specify a list of link state advertisements that the neighbor wishes to receive. Link State Request Packets should be accepted when the neighbor is in states Exchange, Loading, or Full. In all other states Link State Request Packets should be ignored.
Each link state advertisement specified in the Link State Request packet should be located in the router's database, and copied into Link State Update packets for transmission to the neighbor. These link state advertisements should NOT be placed on the Link state retransmission list for the neighbor. If a link state advertisement cannot be found in the database, something has gone wrong with the Database Exchange process, and neighbor event BadLSReq should be generated.