| The following paragraphs cover some of
the multiarea OSPF capabilities and associated configurations in
more detail. You will learn how to configure an ABR and how to
configure route summarization.
Configuring an ABR
There are no special commands to make a router an ABR or an ASBR.
The router becomes an ABR as soon as you configure two of its
interfaces to operate in different areas, as shown in Figure .
Configuring an ASBR
ASBRs are created when you configure OSPF to import, or
redistribute, external routes into OSPF, as shown in Figure .
Note that the ASBR configuration
commands shown in Figure
include the command redistribute
rip.
This command tells OSPF to import RIP routing information. A
detailed discussion of route redistribution can be found in Chapter
7, Route Optimization.
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Interactive
Lab Activity
(Flash,
383 kB) |
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The
purpose of this activity is to configure an Area
Border Router in a multiarea OSPF environment.
SanJose1
and the Singapore routers have already been
configured for OSPF routing. Your task is to
configure SanJose3 to enable Inter-Area routing. |
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