[AUDIO LOGO]
So in this video, let's take a look at OSPF 3 summarization.
Our main purpose here is honestly to show you
that it's exactly the same as OSPF version 2.
Now, obviously, in this case, we're
going to be dealing with IPv6 addresses.
However, the commands are basically the same.
So let's just go ahead and jump in and take a look.
As always, we'll look at our topology quick,
just to see what we're going to be doing and where.
And then we're going to jump into the command line
and put in our summarization.
So what we're going to be doing in this video is
we're going to be taking router 10's loopback 0, which is,
in fact, in OSPF version 3.
It's currently a /128.
We're going to summarize this on router 6
as it's brought into area 0.
Again, router 6 here is the ABR.
So this is actually the only place
that we can do this summarization.
Then to look at externals, we're going
to take router 10's other loopback, which is actually
loopback 100, which is being redistributed,
making router 10 an ASBR.
This is currently being brought in as a /64.
Well, we'll summarize this here on the ASBR.
And we'll bring it in as a /56.
So this is what we're going to be doing.
Let's go ahead and jump into the command line.
We're actually going to start on router 7 looking
at these prefixes before we do our summarization.
So let's jump in and take a look at first router 10's loopback
0.
So we'll do a show ipv6 route specifically
for the 2001:DB8:10::10.
The main thing we want to look at is that this is currently
a /128.
That's what we're going to be changing.
So let's go do our summarization up on router 6.
Go to configuration mode.
Enter router ospfv3 1, into the address-family ipv6.
And then just like with OSPF version 2,
we use the area range command.
Now, in this case, of course, these routes are in area 200.
We put in the range.
And then notice it just wants the IPv6 prefix.
So we're going to make this 2001:db8:10::/64.
We can exit out of configuration and go back
and verify on router 7.
We'll simply repeat the last command.
And now it's a /64.
So as we can see, the summarization
of internal routes on OSPF version 3
is exactly the same as version 2.
We simply use the area range command.
But what about external?
Well, they're the same too, except it is
a slightly different command.
So let's go up to router 10.
We'll go into our routing process, address-family ipv6.
And here's where instead of being summary-address,
like in OSPF version 2, it's summary-prefix.
Other than that gigantic difference, this
is still exactly the same.
So we'll summarize this to 2001:db8:100,
and we'll make it a colon, colon, /56.
Let's go verify this on router 7.
So basically, we'll look at the same route,
except we'll make this 100 colon, colon.
We'll hit Enter.
And as we can see, this is now a /56.
If you remember, when we brought this in, in our previous video,
this was a /64.
Now we're making it a /56.
So as we can see, both our internal
and our external summarization is
pretty much the same as OSPF version 2, aside from it
being summary-prefix.
In this video, we just looked briefly at
how to do network summarization in OSPF version 3.
Just like OSPF version 2, it uses the area range command
for internal prefixes on the ABR.
But it does change the command slightly
to summary-prefix for our external networks on the ASBR.
I hope this has been informative for you,
and I'd like to thank you for viewing.