So for this module since we are going to be going
directly into the library environment,
the first thing we need to do is just review the
topology that we're using for this network,
and in this case we are going to be using the configuration
of a multi-area OSPF network the same as we have been for
the last module or actually, just for the last module,
and in this case, Core 1, 2, and 3,
Ral1 and NYC1 are part of OSPF Area 0; Ral1 and 2 are part of Area 1,
and the NYC routers 1, 2, and 3 are part of Area 2.
The Ral1 and NYC routers are ABRs that are responsible for passing the
different OSPF link state information between the various areas.
So the first thing we're going to do is we're going to move
into Core 1 and take a look and see if we see anything off or
if everything looks the same.
It's been a little bit since I've actually introduced
these problems into this network.
So we'll have to sort of find out what I broke.
At this point we don't see that external network that
was advertised in the previous module.
If we remember from the topology there is an external
network that's connected off of Area 2, and that's not currently in here.
Core 1 is only connected to 1 and 2, or Core 2 and Core 3,
those neighborships are there.
Just on a quick glance,
the OSPF database shows the five devices that are part of Area 0,
as of right now.
Just quickly glancing at it,
it's hard to determine if there's anything wrong with it without going through it individually.