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[MUSIC PLAYING]

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Now that our neighborships are
up within our confederations,

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now let's set up our
BGP neighborships

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and inject the two networks
that we need to inject into BGP.

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So again, this will be a very
short configuration process.

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Let's just jump over to our
topology real quick, talk

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about what we're going to
do, and then jump right

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into the command line.

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What we're going to be
configuring in this video

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is a loopback
interface on router 4,

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and a loopback
interface on router 9.

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Both of these are going to
comply with this IP addressing

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scheme over here on the left.

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Then we're going to configure
eBGP neighborships between R6

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and R10, and R7 and R8.

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Now, just as a note here,
router 10 and router 8

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are preconfigured, but
we will look briefly

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at the configuration
on router 10

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just so we understand how
they've been configured.

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So let's go ahead and start
by looking at that router 10

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configuration, and then we'll
jump into the command line

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and configure the devices
that we need to configure.

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So here's the configuration
that was placed on router 10.

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It's creating a loopback 100
interface with the required IP

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address, and then
it's injecting that

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into BGP with the
network statement.

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Also of note here and the main
reason I wanted to show you

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this configuration is notice the
neighbor statement for router 6

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here.

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The remote AS is
configured as 100.

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Remember, for devices
outside of the confederation

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such as router 10
and it's almost

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the exact same
configuration on router 8,

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obviously, the
numbers are different,

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but they see the intersight
confederation AS 100,

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the confederation ID.

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So what these routers
outside of the confederation

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need to enter for
their neighborships

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is really what we configured
as the confederation ID.

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So now that we've seen what
router 10 looks like, let's

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start configuring our devices.

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We'll just start with router 9.

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So like with router 10, we're
not doing anything really new

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here.

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So I'm just going to paste
the configuration in.

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You can see what we did.

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We simply created a loopback
interface, it went into BGP,

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and injected that network
with a network statement.

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We're going to be doing
the same thing on router 4.

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So router 4, again, we'll just
paste in the configuration,

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again, creating a
loopback interface

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and injecting it into BGP.

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And just to verify, we'll
do a show IP bgp here,

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and we can see that network is
in fact being injected locally.

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And notice, we can also see
that network from router 9 now.

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So we know that router 9 is
also injecting the network

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correctly.

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So the second
thing we need to do

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is set up those
external BGP peers.

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For that, we need to
go over to router 6.

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Once again, this is pretty
standard BGP configuration.

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So we'll just paste it in.

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We're simply adding a neighbor
statement with remote AS 300,

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and we can see here that
the neighbor came up

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because, again, router
10 is already configured.

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If we do a show IP bgp, we
can see that we're actually

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learning that 100.10.10.0/24
network that's supposed to be

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coming from router 10.

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So far so good.

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Now, let's go configure
our BGP peer on router 7.

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Once again, we'll simply
paste in the configuration.

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The BGP neighbor should come up.

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We'll do a show
IP bgp, and we see

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that we're now getting
the network from router 8

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as we're supposed to as well.

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So our goal was to get
our eBGP neighbors up

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and to inject our
networks, and we have

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both of those things completed.

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So in this video, we really just
did some routine work as far

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as injecting some
networks into BGP,

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which we've seen
numerous times before,

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and configuring a relatively
standard eBGP peering.

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The only thing really of note
is that those external routers,

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remember, they're going to
peer with the confederation ID

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as the AS number.

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Also, along the
way, you might have

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noticed that not all the
routes are on all the routers,

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take router 7 here
is an example,

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but we'll be dealing with
that in the next video.

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Again, some of the
routes are missing.

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Some of the routes haven't
selected a best path.

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But that's an issue
for troubleshooting

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our environment, and
that's what we're

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going to do in our next video.

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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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