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Inter-Area Solution (cont) LSA origination changes Routers that originate AS-scope opaque LSAs also set the E-bit in the Options field of originated OSPF Hello packets Such Routers also set the E-bit in the Options field of the header of each LSA it injects into the network LSA validation changes Router MUST look up the routing table for the ASBR with the Router ID matching the Advertising Router ID found in the received LSA header. If no entries could be found (i.e., ASBR is unreachable), the router ignores the LSA. A router MUST discontinue using ALL Opaque LSAs originated by a router that is identified as being unreachable |