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[AUDIO LOGO]

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So in this video, let's take a
look at OSPF 3 summarization.

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Our main purpose here
is honestly to show you

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that it's exactly the
same as OSPF version 2.

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Now, obviously, in
this case, we're

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going to be dealing
with IPv6 addresses.

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However, the commands
are basically the same.

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So let's just go ahead and
jump in and take a look.

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As always, we'll look
at our topology quick,

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just to see what we're
going to be doing and where.

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And then we're going to
jump into the command line

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and put in our summarization.

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So what we're going to
be doing in this video is

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we're going to be taking router
10's loopback 0, which is,

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in fact, in OSPF version 3.

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It's currently a /128.

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We're going to summarize
this on router 6

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as it's brought into area 0.

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Again, router 6 here is the ABR.

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So this is actually
the only place

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that we can do
this summarization.

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Then to look at
externals, we're going

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to take router 10's other
loopback, which is actually

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loopback 100, which is
being redistributed,

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making router 10 an ASBR.

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This is currently being
brought in as a /64.

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Well, we'll summarize
this here on the ASBR.

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And we'll bring it in as a /56.

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So this is what we're
going to be doing.

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Let's go ahead and jump
into the command line.

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We're actually going to
start on router 7 looking

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at these prefixes before
we do our summarization.

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So let's jump in and take a look
at first router 10's loopback

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0.

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So we'll do a show
ipv6 route specifically

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for the 2001:DB8:10::10.

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The main thing we want to look
at is that this is currently

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a /128.

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That's what we're
going to be changing.

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So let's go do our
summarization up on router 6.

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Go to configuration mode.

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Enter router ospfv3 1, into
the address-family ipv6.

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And then just like
with OSPF version 2,

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we use the area range command.

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Now, in this case, of course,
these routes are in area 200.

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We put in the range.

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And then notice it just
wants the IPv6 prefix.

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So we're going to make
this 2001:db8:10::/64.

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We can exit out of
configuration and go back

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and verify on router 7.

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We'll simply repeat
the last command.

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And now it's a /64.

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So as we can see,
the summarization

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of internal routes
on OSPF version 3

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is exactly the
same as version 2.

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We simply use the
area range command.

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But what about external?

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Well, they're the
same too, except it is

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a slightly different command.

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So let's go up to router 10.

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We'll go into our routing
process, address-family ipv6.

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And here's where instead
of being summary-address,

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like in OSPF version
2, it's summary-prefix.

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Other than that gigantic
difference, this

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is still exactly the same.

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So we'll summarize
this to 2001:db8:100,

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and we'll make it a
colon, colon, /56.

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Let's go verify
this on router 7.

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So basically, we'll
look at the same route,

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except we'll make
this 100 colon, colon.

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We'll hit Enter.

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And as we can see,
this is now a /56.

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If you remember, when we brought
this in, in our previous video,

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this was a /64.

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Now we're making it a /56.

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So as we can see,
both our internal

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and our external
summarization is

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pretty much the same as OSPF
version 2, aside from it

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being summary-prefix.

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In this video, we
just looked briefly at

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how to do network summarization
in OSPF version 3.

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Just like OSPF version 2, it
uses the area range command

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for internal
prefixes on the ABR.

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But it does change
the command slightly

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to summary-prefix for our
external networks on the ASBR.

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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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