| In the main figure, the keyword
no-summary
has been added to the
area stub
command on R3. This keyword
causes summary routes (inter-area) to also be blocked from the stub.
Each router in the stub picks the closest ABR as a gateway to
everything outside the area.
The only routes that will appear in R4's routing table are
intra-area routes (designated with an O in the routing table) and
the default route. No inter-area routes (designated with an IA in
the routing table) will be included.
Note It is necessary to configure the
no-summary
keyword only on the totally stubby border routers, because the area
is already configured as stub.
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Lab
Activity |
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In
this lab, you will learn how to configure
OSPF Area 1 as Stub and Totally Stubby. |
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