[MUSIC PLAYING]
Now that our neighborships are up within our confederations,
now let's set up our BGP neighborships
and inject the two networks that we need to inject into BGP.
So again, this will be a very short configuration process.
Let's just jump over to our topology real quick, talk
about what we're going to do, and then jump right
into the command line.
What we're going to be configuring in this video
is a loopback interface on router 4,
and a loopback interface on router 9.
Both of these are going to comply with this IP addressing
scheme over here on the left.
Then we're going to configure eBGP neighborships between R6
and R10, and R7 and R8.
Now, just as a note here, router 10 and router 8
are preconfigured, but we will look briefly
at the configuration on router 10
just so we understand how they've been configured.
So let's go ahead and start by looking at that router 10
configuration, and then we'll jump into the command line
and configure the devices that we need to configure.
So here's the configuration that was placed on router 10.
It's creating a loopback 100 interface with the required IP
address, and then it's injecting that
into BGP with the network statement.
Also of note here and the main reason I wanted to show you
this configuration is notice the neighbor statement for router 6
here.
The remote AS is configured as 100.
Remember, for devices outside of the confederation
such as router 10 and it's almost
the exact same configuration on router 8,
obviously, the numbers are different,
but they see the intersight confederation AS 100,
the confederation ID.
So what these routers outside of the confederation
need to enter for their neighborships
is really what we configured as the confederation ID.
So now that we've seen what router 10 looks like, let's
start configuring our devices.
We'll just start with router 9.
So like with router 10, we're not doing anything really new
here.
So I'm just going to paste the configuration in.
You can see what we did.
We simply created a loopback interface, it went into BGP,
and injected that network with a network statement.
We're going to be doing the same thing on router 4.
So router 4, again, we'll just paste in the configuration,
again, creating a loopback interface
and injecting it into BGP.
And just to verify, we'll do a show IP bgp here,
and we can see that network is in fact being injected locally.
And notice, we can also see that network from router 9 now.
So we know that router 9 is also injecting the network
correctly.
So the second thing we need to do
is set up those external BGP peers.
For that, we need to go over to router 6.
Once again, this is pretty standard BGP configuration.
So we'll just paste it in.
We're simply adding a neighbor statement with remote AS 300,
and we can see here that the neighbor came up
because, again, router 10 is already configured.
If we do a show IP bgp, we can see that we're actually
learning that 100.10.10.0/24 network that's supposed to be
coming from router 10.
So far so good.
Now, let's go configure our BGP peer on router 7.
Once again, we'll simply paste in the configuration.
The BGP neighbor should come up.
We'll do a show IP bgp, and we see
that we're now getting the network from router 8
as we're supposed to as well.
So our goal was to get our eBGP neighbors up
and to inject our networks, and we have
both of those things completed.
So in this video, we really just did some routine work as far
as injecting some networks into BGP,
which we've seen numerous times before,
and configuring a relatively standard eBGP peering.
The only thing really of note is that those external routers,
remember, they're going to peer with the confederation ID
as the AS number.
Also, along the way, you might have
noticed that not all the routes are on all the routers,
take router 7 here is an example,
but we'll be dealing with that in the next video.
Again, some of the routes are missing.
Some of the routes haven't selected a best path.
But that's an issue for troubleshooting
our environment, and that's what we're
going to do in our next video.
I hope this has been informative for you,
and I'd like to thank you for viewing.