Hi,
I had a lot of trouble with this task and had to take a look in DSG. "FastEthernet0/0 interface on R4 should be put into area 4. This area should be configured as a stub area that accepts type-7 LSAs and injects them as type-5 LSAs into the backbone. A default route should be injected into this area from R4, but it should not inject this default into the backbone." There are a few different types of OSPF stub areas: stubby, totally stubby, not so stubby, and totally stubby not so stubby. Stubby and totally stubby will not allow redistribution from other external sources to be added to the area, leaving us with not so stubby and totally stubby not so stubby. In order to generate the default route, the nssa area will be configured with the command area x nssa default-information-originate. R4(config)#router ospf 1 R4(config-router)#network 10.1.1.4 0.0.0.0 are 4 R4(config-router)#area 4 nssa default-information-originate Can anyone explain me this task and the last command entered in router ospf 1?
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