In this video, we get to walk through the summarization at the ABR regarding a
set of networks.
So I propose as a demonstration, let's go ahead and let's use R3.
And at that ABR, let's take all the routes.
And again, with IPv6 freezing, 2001, DBA6783.
And then the X right here represents the actual subnet identifier.
Let's go ahead and take any routes that begin with 2001, DBA6783,
that 48-bit address space. And let's summarize those into one route as we WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
that 48-bit address space. And let's summarize those into one route as we
advertise them up into Area 0.
So before we do the summarization at the ABR, Area 0, like on R1,
should be able to see the detailed routes for the 35 subnet, the 57 subnet, and
the 7 subnet.
And after we're done, it should only see the one summary route that covers
those address spaces.
And the syntax is very similar to what we did in OSPF version 2.
We are going to go ahead and use the range command.
So what we'll do on R3 is we'll go into router configuration mode for OSPF
version 3, WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
version 3,
for process ID number 1.
Then we'll go into the address family for IPv6.
And then in that address family, we'll say Area 1,
and that's my little symbol there for a space.
We'll put a space following Area 1.
We'll use the keyword range space there.
And then we'll put in our summary address.
So if we wanted to summarize anything that fell within 2001,
DB8, 678, 3, with a slash 48, which represents those first 48 bits, after that
summary is in place,
up here in Area 0, all they should see is that one summary, WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
and they wouldn't no longer be able to see the actual detailed routes of 35, 57
, and 7.
So that's our game plan of what we want to accomplish.
Let's go ahead and check the before picture.
We'll implement our summarization here on R3,
and then we'll compare the results to what we saw before.
So here we go.
Let's go ahead and do our before comparison.
So we go to R1, and we do a show IPv6 route.
And we'll go ahead and tack on OSPF for OSPF learned routes.
Here is the 35 network between R3 and R5.
Here is the 57 network between R5 and R7. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
Here is the 57 network between R5 and R7.
And here is the 7 network that's hanging off at gig 00 on R7.
So to create the summary, we'll go to the right router.
So let's go to router 3.
That's our area border router.
And on R3, let's go ahead and do a show, run, pipe, section router.
And then it'll save us a little bit of typing.
Then we'll go into configuration mode.
We'll go into router OSPF version 3, process ID1, by pasting that in.
Then we'll go to our address family for R5,
365 unit gas, by copying that, pasting it in.
And now in the address family configuration, WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
And now in the address family configuration,
here's where we specify our summary.
And let's say area 1, space, question mark.
And we need the range command, as shown right here.
So we'll type in range.
And then we'll specify the range which we want to summarize.
So let's go ahead and let's use 2001, colon, db8, colon, 678, 3.
And let's just go ahead and use those 48 bits.
So I'll put a colon, colon slash 48, and press enter.
So now anything begins with these 48 bits.
2001, db8, 678, 3.
Again, those are hexadecimal representations of the binary behind it. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
Again, those are hexadecimal representations of the binary behind it.
A thing that matches that is going to be suppressed and not advertised.
But instead, just that one summary will show up in the other area.
So we're summarizing from area 1.
So let's go back up to router 1.
Where a moment ago, it could see the 7 subnet.
And it could see the 57 subnet.
And also the 35 subnet.
So now we hit the up arrow key.
And do a show IPv6 route, OSBF.
Now notice we have a summary route right here.
That's been advertised by our ABR.
That's R3 of 2001, db8, 678, 3. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
That's R3 of 2001, db8, 678, 3.
Slaps 48.
And if we go to the end of this,
you'll notice we no longer have the more detailed LSA type 3s.
And as a result, we no longer have those more detailed
inter-area routes.
So if we look for the 35 network, it is not there.
There's 34 and 35 would be right below it.
It's not there.
There's no 57 network.
That'd be underneath 46.
And there's no 7 network.
And that would be somewhere between 4 and 8.
So those three more detailed routes have now been suppressed.
Because we're doing summarization at the area border router. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
Because we're doing summarization at the area border router.
So another way we have the opportunity to discuss,
configure and verify many aspects.
We're going OSBF v3 for the address family of IPv6.
In the next video, I'm going to put you on a hands-on lab
so you can get your own hands-on practice.
I'll see you in the next video when you're ready.