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Short answer: Two OSPF routers connected via an Ethernet segment are exchanging Hello boxes. How often will these packets be sent? By , what's going to the OSPF dead time for that link happen to be? In factors example, R1 and R3 are adjacent and both have interfaces in Area three. R4 has an adjacency with R3 via Area 34, but R4 has no physical interface in Area 0 and is advertising its loopback 5.4.4.4 into OSPF. R1 doesn't acquire the route certain loopback. You need to connect inside your computer for the yellow ports using the cable. Might be better to link straight