[AUDIO LOGO]
So now let's take a look at summarization
and redistribution in IS-IS for IPv6.
Now, keep in mind that as we said
at the end of the last video, I've
already gone through offline and enabled all of our devices
in all of our areas to support IPv6 in IS-IS.
So basically, I just added a lot of address families
to a lot of interfaces.
So everything's up and running in all of our areas,
that's going to allow us to do our summarization
and redistribution.
So let's take a look at the topology,
talk about what we're going to do,
and then we'll jump into the command line and get it set up.
So for this summarization, what will be focusing on is router
eight loopback coming in to IS-IS,
right now it's coming in as a /128.
And we'll go ahead and summarize that as it's
coming in to IS-IS.
We'll look at it on router nine up here
just so we can see what it looks like as it
comes all the way through all of the different areas.
Then we'll do our redistribution,
and we'll be focusing on redistributing between BGP
and IS-IS here on router six.
So let's go ahead and jump into the command line.
We'll start on router nine looking at router
eight current situation for its loopback.
So we'll just start with a show IPv6 route IS-IS.
And as we said, we're going to be focusing in on router eight
loopback here, which is currently coming in as a /128.
Well, let's go over to router eight and summarize it.
So on router eight, we'll go into router IS-IS one,
under our address family IPv6 unicast,
we'll do summary prefix.
And here it wants us to put in the prefix
we're going to summarize too.
So for this particular example, it would be 2001:db8:10::
And we're going to make this a slash 64.
As far as options here, we can control which level
it's going to summarize into--
it's going to summarize into level two by default.
So we can just do something maybe
we want to tag this as an 8 since it's
coming from router 8.
We'll go ahead and exit configuration.
And now that it's summarized, let's
go back to router 9, and see what that route looks like now.
So on router 9, we'll start just by repeating
our previous command.
And we see that now that route is coming
in as a 2001:db8:10::/64.
Let's see what it looks like if we ask for more detail on it.
We'll say show IPv6 route, and then we'll say
2001:db8:10::/64.
And here we see the information on the route.
Although notice, it is not showing the tag.
We can see the tag if we go over to router 1.
On router 1, we'll do the same command.
Show route IPv6 for 2001:db8:10::/64.
And notice on this route, it is, in fact, showing us
that it's tagged with an 8.
So this tells us that the summarization is working.
Now, let's take a look at redistribution.
For this, we'll, of course, go over to router 6.
We'll go into router isis again, into our address family IPv6
unicast.
And all we have to do is say redistribute bgp 100.
We'll exit configuration.
And let's hop on to another router to make sure this route
is being propagated.
We'll just use router 7.
Well, let's do a show IPv6 route isis.
And what we're looking for here is
we should have a 10:10 entry, which is router 10's loopback.
And we can see right here that we do.
Let's look at the detail of that entry.
But I want to see the prefix attributes.
So let's go ahead and look at the rib
instead of the routing table.
So we'll say show isis IPv6 rib.
And this is going to be, of course,
for the 2001:db8:10::/128.
So, of course, what we're looking for specifically here
is that prefix attribute where x is set to 1 just like it
was in IPv4 indicating that this is a route that has
been redistributed into isis.
In this video, we saw how to do summarization
and redistribution with IPv6 in isis.
And one thing that I hope we take away from this
is that configuring IPv6 in isis really
isn't that much different from configuring IPv4 other
than, of course, the addresses themselves are very different.
I hope this has been informative for you.
And I'd like to thank you for viewing.