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So here are the lab tasks.

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Let's take a look at our lab topology as well.

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So here's our lab topology.

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It has not changed.

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We're going to be configuring for IPv4.

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And then once we have it all configured,

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we want to verify connectivity between R7 and R8,

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or we could also use the PCs that are hanging off

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of those respected networks.

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And then we get to answer the following questions.

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And those questions are on R7,

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how many of each of the LSA types exists,

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including LSA type ones, LSA type twos,

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and LSA type threes.
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and LSA type threes.

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So I've reset the lab,

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so I can walk through this from scratch with you.

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And having said that,

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well, let's go to the lab environment.

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All right, so here we go.

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This is verifier lab topology here from desktop, fantastic.

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And let's go to server one by double clicking on that,

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giving that a moment to initialize.

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And there it is.

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And because it's going to be more convenient to do so,

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I'm going to choose to use the text document

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and not manually type it in.

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So I don't need to worry about clearing any routing processes

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because it's brand new and I just reset it.
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because it's brand new and I just reset it.

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So we'll go to R1, put that config in,

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and go to R2, there's R2.

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And again, I'm going to repeat that for all eight routers.

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All right, and there is R8.

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And if you wanted to play around

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and maybe do some interfaces and interface config

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versus the network statement,

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certainly feel free to do that as well.

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I'm going to go to this icon right here.

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And I'm going to go ahead and tell it to reset

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the OSPF process on all routers.

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Such that we'll click there.

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And let's have it clear.

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I'm going to type OSPF process and press enter a couple times
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I'm going to type OSPF process and press enter a couple times

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because it's going to ask us to confirm.

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I'll select all the routers and I'll remove PC178 from that

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and click on send script.

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Oh, and knows the default.

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So I need to do that again.

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We'll do a clear IP OSPF process, press enter, type yes,

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press enter a couple times, there we go.

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That's going to be much better.

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And if at first you don't succeed, try, try again.

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So we're going to send that to all eight routers,

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click on send.

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And that was given nice fresh reset to everything.

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All the neighbors will go down.

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They'll do it out based on who's going to become the DR
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They'll do it out based on who's going to become the DR

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for a given segment.

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And assuming the priorities are out equal

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and they are by default, they're one,

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the router with the highest router ID will become the DR

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for a given segment.

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So here on our eight, if you do a show, IP OSPF interface

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brief, press enter.

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This is the common interface between our eight and our six.

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And it should win as the DR because they both

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have a priority of one by default.

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And our eight has a higher router ID.

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So if we hit the upper key, we can confirm that it just

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became the DR and we do a show, IP OSPF neighbors.
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became the DR and we do a show, IP OSPF neighbors.

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We also can see that our six became the backup designated router.

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All right, fantastic.

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And presuming the whole network has converged,

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let's test our connectivity from the left hand side

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of our network over to the right.

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So here's our topology.

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And since we're sitting here at our eight,

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let's just do a trace over to 10177.

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That's the IP address on gig 00 of our seven.

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So we'll go back to our eight.

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And we'll do a trace to 10.1.7.7.

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And survey says, sure enough, full connectivity.

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And let's go back to our lab tasks.
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And let's go back to our lab tasks.

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So now we've verified full connectivity.

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On our seven, identify the quantity of each of the LSA types.

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So to do that, we'll need to go to our seven.

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And here on our seven, we'll do a show, IP OSPF database,

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press enter, and hit space.

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All right, and then we're going to scroll up

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to answer these questions.

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So this router, our seven, is only in area one.

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So that's all we're going to see information for.

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So this is the LSA type ones for area one.

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And we have three of them.

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A router LSA from R3, R5, and R7.
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A router LSA from R3, R5, and R7.

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We take a peek at the topology.

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That'd be those three routers that have interfaces

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in area one, fantastic.

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And then here for our network LSAs, these are LSA type twos

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generated by the designated routers in that area.

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Showing here that R5 is a designated router

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for the segment 10.1.35.

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And R7 is a designated router for the network

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10.1.57.

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So for LSA type ones, we have three for LSA type twos.

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We have two of them.
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We have two of them.

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And then for the LSA type threes, which

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are the summary LSAs that are generated

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by the ABR for that area, which is R3, we have all of these.

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So if we count those, it looks like 18.

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And that's representing 18 routes, if you will,

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that are reachable through the ABR.

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And those routes are in different areas.

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For example, these four right here,

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those are the loop backs on the four backbone area routers.

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Here are the loop backs on R6 and R8, which are in area two.

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These routes are all off of R1234 off their gig 00 interfaces.
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These routes are all off of R1234 off their gig 00 interfaces.

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Here are four more backbone area routes between R1 and R2

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and R1 and R3 and R2 and R4 and R3 and R4.

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And these are four networks over in area two.

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So if you took on the lab and got the hands on practice,

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good on you.

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That's the key secret in getting better and better

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and understand the technology and how to implement, verify,

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and when needed, troubleshoot the technology.

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And if you want more information and practice with OSPF version three,

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I've gotten great news for you.
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I've gotten great news for you.

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That's in our next skills.

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We'll take a look at configuring that and then adding some additional filtering

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and tweaking and tuning for both IPP4 and IPP6 in the world of OSPF V3.

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So I'll see you in the next video when you're ready.

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Until then, I hope this has been informative and I'd like to thank you for

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viewing.