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In the previous video, we implemented OSPF for IP version 4 and did a few show

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commands to verify its behavior.

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In this video, we're going to implement OSPF for IPv6 once again using the more

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traditional method for the implementation.

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And as a reminder of our topology for IPv6, I'm using this number here in red

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as the IPv6 subnets.

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So IPv6 addresses are already in place.

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Also, IPv6 unicast routing and IPv6 cep are already enabled on all the routers.

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And the addressing scheme we're using is 2001, DB86783, and then that red
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And the addressing scheme we're using is 2001, DB86783, and then that red

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number.

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So 13, 12, 24, 34, and then 35, 57, 46, and 68.

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Now, even though we're using IPv6, a lot of the same concepts are going to

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apply when using OSPF.

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And that is we have to make sure all the parameters match between peers.

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Also, we enable an interface to become part of OSPF.

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We're going to specify which OSPF area that interface belongs to.

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So, almost identical as far as the logic between IPv4 and IPv6 except this time
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So, almost identical as far as the logic between IPv4 and IPv6 except this time

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using IPv6.

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So here, picking up where we left off, we have a couple of choices.

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If we go back to our notepad document, we could, before we implement OSPF for

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IPv6,

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we could just clear all the routing processes altogether.

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However, because IPv4 and IPv6 are like ships in the night,

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we can just leave the IPv4 running and not even bother clearing it.

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We can just add on top of it the routing for IPv6.

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So if you want to use the notepad document when you get to the lab at the end
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So if you want to use the notepad document when you get to the lab at the end

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of this set of videos,

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feel free to do so.

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And here is the section right here, IPv6 OSPF.

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So I'm not going to clear off the router configs for the OSPF for version 4.

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I was going to add on the additional IPv6 routing process for IPv6.

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In fact, let's just verify we have a couple things in place.

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Let's do a show IPv6 interface brief and sure enough, IPv6 is configured,

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fantastic.

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Let's also do a show run, pipe, include IPv6.
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IPv6 Unicast routing is enabled, which it is.

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And IPv6-SF is enabled, which it is, fantastic.

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And these are all the IPv6 addresses that I have on their respective interfaces

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.

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So if we were to do a show IPv6 protocols in press center,

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we currently are not running any IPv6 dynamic routing protocols.

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But we're going to change that by configuring it right now.

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So on our one, we're going to type in IPv6 router OSPF.

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We'll use process ID1 again.

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We're also going to specify AutoCost reference bandwidth of 1000,

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because I want to be able for OSPF to differentiate the value or the cost
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because I want to be able for OSPF to differentiate the value or the cost

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between gigabit Ethernet and fast Ethernet.

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Then once that's set up, I'm going to go into each of the interfaces

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and use the IPv6 OSPF same process ID1

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and then tell it what area it's going to be in.

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So all the interfaces on our one are going to be an area zero.

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If we scroll down to an area border router,

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it's four slash one interface is going to be in area one.

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And when you get to the lab, you know, the end of this set of videos,

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I would encourage you, as you do the lab, to go ahead and maybe do a few of the
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interfaces,

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a few of the routers manually.

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And then once you're comfortable with the syntax that you can do it,

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then go ahead and do the copy paste.

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Just for the benefit of learning it and making sure you practice it.

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And also for a little bit of time saving as well.

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So I'm going to go ahead and grab this config for R1.

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I'll right-click, copy that, go to the right router,

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and paste it in.

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And then we'll go to R2 and we'll continue.

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So here at R2, I'll grab that.

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All the interfaces are going to be an area zero.

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So go ahead and go to R2, paste that in.

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And we should have a neighbor adjacency between R2 and R1 here
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And we should have a neighbor adjacency between R2 and R1 here

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in just a few moments.

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In fact, I'm going to wait.

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In fact, let's do a show IPv6 OSPF interface brief.

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Yep, and I did it soon enough where they're duking it out right now

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between R1 and R2, but who gets to be the actual DR

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for that segment for IPv6?

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And when I say that segment, I'm talking about the interface gig 2, 0

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interface on R2 that's connected over to the same segment

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that R1's gig 1, 0 is.

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And there it is.

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All right, so we have our adjacency.
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All right, so we have our adjacency.

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And I also would expect, because we just duked it out,

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because R2 has a higher router ID.

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And the default priority is set.

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I would expect that R2 is the designated router for that segment.

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So we hit the up arrow key and do a show IPv6 interface brief.

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Sure enough, on its gig 2, 0, it is the DR.

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There is one neighbor, and we are fully adjacent.

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All right, let's continue on.

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So we'll go to R3.

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We'll copy the config for R3.

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We'll go to R3 and right click and paste.

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And then we'll go to R4.

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So here's R4, and just similar to R3.
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So here's R4, and just similar to R3.

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R4 has most of its interfaces in Area 0.

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And one of its interfaces in Area 2.

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So I'll right click on that, copy that config,

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go to the right router, and right click to paste it in.

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Then we'll continue on to R5.

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All of its interfaces are in Area 1.

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So right click, copy, and go to R5.

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Right click.

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And as you're working on the lab, if you want to download

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from the skill, the topology here,

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that might not be a bad idea that we can have the topology

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on a separate screen.

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Or if you want to download it and print it,
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Or if you want to download it and print it,

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so it's really easy to see, that's not a bad idea as well.

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All right, so that's R5.

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Let's go to R6.

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So here's R6.

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All of its interfaces are in Area 2.

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So we'll right click, go to R6, and right click.

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All right, and then we'll go to R7.

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All of its interfaces are in Area 1.

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So we'll right click, copy, and go to R7.

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Paste that in, and our last router is router 8.

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So we'll grab the config for R8.

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Go to the right router, router 8, and paste that in.

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All right, so let's just in spot checks.
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All right, so let's just in spot checks.

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Let's go to a backbone router like R1.

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And let's do a show IP route.

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First of have it.

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Show IPv6 route.

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All right, so we have a whole bunch of OSPF routes.

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So the OI are inter-area routes, and the O's there

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are intra-area routes.

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So as a test, if we wanted to go down to PC7,

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so it's 10.1.7.10s.

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It's IPv4 address.

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And on this little virtual PC, it's IPv6 address also

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ends in 10, but it would be the 2001 DB867837 network,
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ends in 10, but it would be the 2001 DB867837 network,

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and then a 10.

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So let's go down to PC7, and just verify

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we have complete connectivity all the way around the horn

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from PC7.

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And let's do a test all the way to over to PC8.

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And we can verify both addresses as well.

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So let's go to PC7.

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Here's the tab for that right there.

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So its IPv6 address is this.

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And on PC8, its IPv6 address is this.

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You can see it, by the way, just by doing
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You can see it, by the way, just by doing

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on these little virtual PCs, show IP, or show IPv6,

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respectively.

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So let me copy the IPv6 address for PC8.

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And let's go to PC7.

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And let's do a ping.

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And we'll right click and paste and enter.

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And that is working in the virtualized lab environment.

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That's kind of a long delay.

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However, it's working.

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And let's also do a trace over that same destination address

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of 2001 DB867838 colon clon-clon-ten.

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And that is showing first hop is R7,
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And that is showing first hop is R7,

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then R5, then R3, and R1, R2, or 4, or 6, or 8,

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to the final destination.

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So that looks great as far as connectivity is concerned.

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And of course, we could also do that trace from a router.

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So R7 in the bottom left of our topology.

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Let's take a look at that topology again.

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So here from R7, we could also do the trace either to an

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interface on R8, or to PC8, or server 1nug also has

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a IPv6 address ending in 100.

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And this subnet is 2001 DB867838.
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And this subnet is 2001 DB867838.

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So let's go to R7 and verify trace from there as well.

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So here at R7, we'll go ahead and do a trace, and we'll paste in

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that address that we just used.

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2001 DB86783810 press center.

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And sure enough, same exact path.

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Up through R5, then 3, then 1, then 2, then 4, and 6, and 8,

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and finally hitting the destination.

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I also have the server over at 100 on that same remote

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subnet on the far right press center.

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That's also responding.

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So let's give this to some checks.

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And on our four, let's do a show IPv6 OSPF Interface Brief
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And on our four, let's do a show IPv6 OSPF Interface Brief

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to verify our interfaces.

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We'll do a show IPv6 OSPF neighbor to show us our neighbors.

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We need to show IPv6 OSPF press center.

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And that'll show us the details about our OSPF.

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Now, even though we configured it with a legacy method,

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it still shows here its OSPF B3 process ID1.

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Now, that is distinct and different from using the OSPF

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version 3 option that I'll be showing you in the next video.

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So just realize for IPv6 OSPF, here's referring to OSPF B3,
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So just realize for IPv6 OSPF, here's referring to OSPF B3,

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even though we configured it with the traditional method.

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There's the router ID.

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Here, it's showing us it's an area border router

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because it's connected to the backbone area

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and a non-backbone area.

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Here, it's showing us the number of areas

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it's connected to, two normal areas, 0 stub and 0 NSSA.

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Here's the reference bandwidth that we configured.

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And here's the information about area 0.

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And I cut it off too soon.

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So I'll go ahead and spacebar.

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And now that I'm not truncating it,

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here is the backbone area information
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here is the backbone area information

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and here is the area 2 information.

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And if we want to take a look at the LSAs,

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even though OSPF for IPv6 has additional above and beyond

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what IPv4's OSPF has, we can still focus on the LSA type 1s

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and 2s and 3s, and we can also reinforce what they do.

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So see the LSAs, we can do a show IPv6 OSPF database.

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And again, because we're on an area border router,

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our four, it should have a whole set of LSA type 1, 2s

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and 3s for area 0 and also a whole set for area 2.

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So press enter.
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So press enter.

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So here are the router LSAs, the LSA type 1s for area 0.

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And then we have our network LSAs,

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this is the LSA type 2s for the backbone area generated

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by the DRs for each of those network segments.

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And then if we get down further,

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we have the LSA type 3s, the summary LSAs.

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So in this column here, it has the advertising router.

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So that's R3 and R4 respectively as ABRs.

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And over here in this column, it has the actual prefix

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being advertised in those LSAs.

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There's a few additional LSA types

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with the OSPF version for IPv6.
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with the OSPF version for IPv6.

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However, I'm focused just on the LSA type 1s and 2s

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and 3s for this discussion.

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So now as we get onto area 2, here's the LSA type 1s,

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the router LSAs for area 2.

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Here's the network LSA, the LSA type 2 for area 2.

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And this time, router 8888 is the designated router

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based on the person who's advertising that.

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And we could verify that by going to R8.

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And do a show IPv6 OSPF interface brief

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and sure enough for the network segment between R8 and R6.

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R8 is the DR as shown right there.
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R8 is the DR as shown right there.

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All right, fantastic.

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So back to our four we go.

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And then our four for area 2 is advertising all of these routes.

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So each of these is an LSA type 3 advertising the one network

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and the two network and the 34 network.

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So the networks for advertising are all the IPv6 networks

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that are not inside of area 2, including networks

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from the backbone area and also networks

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that are reachable over in area 1.

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So in this video, we've taken a look

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at how to configure IPv6's flavor of OSPF
WEBVTT
X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000

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at how to configure IPv6's flavor of OSPF

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using the traditional method.

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And to compare and contrast this method,

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we just did with using literally OSPF V3.

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In the next video, I'd like to demonstrate that as well.

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So I'll see you there in just a moment when you're ready.