So based on our plan, our next step is to advertise some routes from this BGP
router
so that our tier zero router could learn about it.
So we could advertise routes like the default route or we could advertise
specific routes.
So as far as verification and testing, let's create a new loopback interface up
on this
BGP router with the address of 88.88.88.88.88.
We'll make that a slash 24-bit network and we'll also go ahead and make that
out of loopback
8 and then we'll take a further step and we'll advertise that 88.88.88.88. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
8 and then we'll take a further step and we'll advertise that 88.88.88.88.
Etc. in BGP and as a result, that route that 88.88. etc.
network should show up as a route on our tier zero gateway.
So let's head over to our external BGP router and let's set it up.
So here we are at our external router router 673.
Let me do a quick check with the interface addresses.
Let's show IP interface brief and I'll say please exclude any interfaces that
have the
word UNA in it for unassigned.
And so I just have one interface with an IP address and that's great. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
And so I just have one interface with an IP address and that's great.
So I just want to create a new loopback interface.
We'll make interface loopback 88 based on our plan and give it the IP address
of 88.88.88.88
with a mask of three octets on and one octet off for equivalent of a 24-bit
mask press
enter, but a Bing, but a boom.
We now have this logical loopback address of 88, etc.
Now let's advertise that as part of BGP.
So we'll type in router BGP 673.
That's our autonomous system number and then we'll say network and we'll WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
That's our autonomous system number and then we'll say network and we'll
advertise the 88
network and it is a 24-bit network.
So we use the keyword mask there and specify it's a 24-bit mask just like that.
Then we do a show IP BGP summary and press enter.
It's now going to show us here we have our two neighbors.
That's edge one and edge two respectively.
And if we do a show IP protocols, it's going to show us our dynamic routing
protocols.
So here are our two neighbors and we're using the routing information from this
one.
That's because its routes have a shorter AS path.
And if we use the command show IP BGP, IBB4 unit cast, that'll show us the BGP WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
And if we use the command show IP BGP, IBB4 unit cast, that'll show us the BGP
table.
So there is, I just want to verify it made it into BGP.
So there's our 88, 88 network and it's currently showing the next top of the
whole zeros and
that's because that is directly connected here to this router, our 673.
So the next question is, is this route yes or no for 88, 88, etc.
So we're going up over on our services router for gateway zero.
So to verify that, we'll connect once again over to our edge transport node,
edge one.
Let's do a gate gateways, press enter.
And then let's go into VR after number four for our services router. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
And then let's go into VR after number four for our services router.
We'll type in VRF or press enter.
And then from here, let's do a get BGP, a space in the question mark.
Let's type in neighbor, a space in the question mark, keyword summary and press
enter.
And that's showing us currently that we are advertising two prefixes as the 10,
10, and
20 networks and now shows that we are receiving or learning about one prefix.
And if we did a get route and press enter here in the services router.
So there's our command right there at the top.
This is showing us that we now have a BGP learned route. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
This is showing us that we now have a BGP learned route.
That's the B right there, meaning that we learned that via BGP, there's the
actual prefix
that we learned, the 24 bit network, 88, 88, 88, 88.
Here's showing the administrative distance of 20 because that's the admission
of distance
associated with an external BGP learned route.
And there's the next top 192, once you get one dot 121, which is the IP address
of our
BGP speaker.
So from here, we should be able to do a ping to this IP address, 88, 88, 88,
and then if
we get the host part right, which is also 88, we should be able to get a WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
we get the host part right, which is also 88, we should be able to get a
response.
So we'll do a ping to 88, et cetera, just like that press enter.
And sure enough, that's our BGP router on the other side on the physical
network responding
back to us.
So we'll do a control C to stop that.
Another way of seeing the routing table would be a get forwarding press center.
So here with the get forwarding command, there's our route as well.
It's not showing us in this output exactly how it was learned, but the get
route command
that we did earlier that does show us.
We also have options from the graphical user interface and the NSX manager to WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
We also have options from the graphical user interface and the NSX manager to
see the routing
tables as well.
So here in our networking currently, we're looking at our tier zero gateways.
We expand that and we scroll down, we go down to the BGP and then click here
where it
says BGP neighbors, it's going to show us our current status.
So currently we have a BGP adjacency with 192.1.1.21, who's in the remote AS of
6783?
And if we close that and look at the routing table on our tier zero gateway,
one way of
doing that would be to go back to our network topology.
So there's our topology. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
So there's our topology.
Here's our tier zero gateway.
If we go ahead and click on that over here on the right, if we had download the
routing
or forwarding table, another difference there is the routing table should
include all the
routes it has.
Well, the forwarding table is the actual routes that it's going to use.
So the thing of the forwarding table, like the best of the best, the actual
routes we're
going to use.
So if you want to download those or look at them, we can click right here and
it's asking,
okay, where do you want to pull these from?
Because we have several devices that have that information.
For example, we have it on edge one, we've got a replica of that over on edge
two.
Where do you want to see it?
So we'll go ahead and use the drop down and let's go ahead and pull it from WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
So we'll go ahead and use the drop down and let's go ahead and pull it from
edge one and
click on download.
So it downloaded it to my management computer as a CSV and here are the routes
which are
including the IPv4 routes and also the IPv6 routes.
So there's our default route that we are learning via OSPF.
Here's the route to the 88 network that we're now learning here through BGP and
the other
routes that we looked at previously.
[BLANK_AUDIO]