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[AUDIO LOGO]

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So we're going to begin here by
jumping in and putting together

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a game plan of how we're
going to build and design

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our BGP environment.

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We're going to have
eight routers that

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are going to be involved
in one AS, AS 100, which

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is going to be composed of
confederations and route

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reflectors.

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That way we get to use
both of these features

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together and see how they
work in conjunction with one

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another.

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Then we'll save our
other two routers

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just to act like external
or outside routers.

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So let's bring up our
topology and take a look

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at what we're going
to be building

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and what our game
plan is going to be

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for the rest of this skill.

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We have a lot of stuff to
do, so let's jump right in.

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So throughout this
skill, we are going

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to be using BGP Topology 2.

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And some important things
to point out as we jump in.

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So first we have our external
As's, we have AS 200 down

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here on router 8, we have
AS 300 up here on router 10.

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All of the other
routers are going

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to be in confederation AS 100.

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Confederation AS 100 is going
to consist of AS 65001, 65002,

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and 65003 running on each
of the routers as indicated.

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Also be aware even
though it's not really

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going to affect us a lot,
that AS 65002 is running OSPF,

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specifically it's all in area 0.

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This is simply for the
routing between router 6

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and router 7's loopbacks.

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And as 65001 is running
IS-IS, again all in one area.

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This is, again, for reachability
between the loopbacks.

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The main reason we need to know
this as we're configuring BGP

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is these two routing
domains are not

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sharing routes with each other.

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There's no redistribution
or anything like that.

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That's actually going to cause
us some interesting issues

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as we get into BGP.

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So now let's discuss some
of our peering goals.

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So first in AS 65001,
we'll start off

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peering between router 1 and 2,
router 1 and 3, router 1 and 5,

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and router 1 and 4.

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Now, with peering
like this in AS 65001,

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this means that
router 1 is definitely

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going to have to be
a route reflector.

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Now, ultimately, we're
going to also make

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router 2 a route reflector
so that we have redundancy.

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We're going to
actually configure

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this part right towards the
very end, but when we do,

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we're going to have
to add more peerings.

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So router 2 is also going
to peer with router 5,

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it's going to peer
with router 3,

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and it's going to
peer with router 4.

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And of course, we'll keep
it's peering with router 1

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although we will be adjusting
how that peering is configured.

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And then in AS 65002 we're going
to be peering between routers 6

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and 7.

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So that will take care of what
we need for our iBGP peerings.

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Now, for our
intra-confederation peerings,

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we're going to be
peering between router 1

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and router 9, router 2 and
router 9, router 1 and router

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6, router 3 and router 7.

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And then, of course, we're going
to have our external peering.

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We'll be peering
between router 6

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and router 10 and
router 8 and router 7.

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Along the way, we're
also going to be

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injecting some routes into BGP.

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We'll make all of these
100.x.x.0/24 where

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the x's represent
the device number.

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We'll be creating one
of these loopbacks

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ultimately on router 4,
there'll be one on router 9,

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they'll be one on router 10,
and they'll be one on router 8.

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These are going to
be the networks.

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So we're going to
be injecting to see

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how they behave in our
combination confederation route

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reflector environment.

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One final note here, we're
going to be running our BGP

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neighborships according to
where our IGPs are running.

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Meaning in AS 65001
and 65002 here where

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we are running an IGP
and we have reachability

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to the other
devices loopback, we

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will be peering those
using loopbacks.

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For pretty much all of
the other neighborships,

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we will be peering them
using physical addresses

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because there's no other routing
running in this environment.

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So in this video, we
just took a few minutes

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to put together a
game plan of how

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we're going to be building
our BGP environment as we

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move forward in this skill.

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One last thing to keep in mind,
none of this configuration

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is done yet except for the
IGPs that are up and running

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and all of the devices do
have their IP addresses

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configured on their interfaces,
the interfaces are up,

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and they do have at least
link local connectivity.

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I hope this has been
informative for you.

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And I'd like to thank
you for viewing.

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