Network administrators decide to change OSPF Area 1 to a stub area in order to solve some performance issues. No routes are redistributed into area 1.
What is one implication of making this change?
A. Endpoints in Area 1 will no longer be able to reach external networks.
B. Routing devices in area 1 will no longer exchange Type 1 and Type 2 LSAs with each other.
C. Endpoints in Area 1 will no longer be able to reach endpoints in other areas.
D. Routing devices in area 1 will temporarily lose adjacency while the change is made.
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Sorry, i meant to say that endpoints in Area1 will no longer be able to reach external networks.
It will be true if the ABR redistribuite the default route, but the question said: “No routes are redistributed into area 1”.
So, when you configure an area as Stub, no external routes will be known by the routers and, without a default, the endpoints will no longher be able to reach endpoints into other areas.
This is confusing as routers that are being configured as a normal area to a stub will lose adjacency as there will be a temporary mismatch in area config. This is even mentioned in the official study guide.
Technically endpoints can still reach external networks – they will just use the default route pointing to the ABR and let it do the rest of the work from there.
Interested to hear other thoughts on this.