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So in this video, we're going to work on our Gateway Zero,

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this guy right there, and configure it to work with OSPF.

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So we're going to use area zero,

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so we'll go ahead and define area zero in

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the configuration for our tier zero gateway.

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Then we'll specify that the interfaces that this gateway is using as it

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connects to this external segment which is being provided by Edge 1 and Edge 2,

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we'll specify that we want both of those interfaces participating in OSPF area

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zero.

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So here in the NSX Manager, to do that,

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we'll click here on the networking tab.

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And then on the left, let's just take a peek at our network topology to make
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And then on the left, let's just take a peek at our network topology to make

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sure it hasn't changed.

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No, it hasn't, fantastic.

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And let's go configure our tier zero gateway and enable it for OSPF.

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So to do that, with networking still selected on the left hand side and our

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connectivity,

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we'll click here on tier zero gateways.

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And here for our tier zero gateway, we can expand it before we start to edit.

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If we go to OSPF currently, OSPF is disabled.

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So let's go ahead and configure it by going to the three dots for our tier zero

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gateway

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and from the sub menu clicking on edit.

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From here, we'll scroll down and we'll go down to OSPF and we want to, first of
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From here, we'll scroll down and we'll go down to OSPF and we want to, first of

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all, enable it.

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So we'll go ahead and click on the slider there to enable OSPF.

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We also want to set up an area zero.

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So here in the OSPF section, over on the right, it says area definition.

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And we'll click here so we can go ahead and set up an area.

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And what we want to do is set up area zero.

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So there's no area definitions found.

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And all we need is area zero.

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So we'll create it by clicking right here on add area definition.

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And then we'll enter the area ID.

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I'm going to put in four zeros, which effectively means area zero, the backbone
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I'm going to put in four zeros, which effectively means area zero, the backbone

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area.

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So I'm going to leave everything else at their default and then click on safe.

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So now we have an area called area zero and we'll click on close.

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And now that we have that area and here there's a one there where it says area

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definition,

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we can now go ahead and specify which interfaces that we want to participate in

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that area.

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So to do that, what we're going to do is go down here still in the OSPF section

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and

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go down to OSPF configured interfaces.

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And here we're going to click on set.
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And here we're going to click on set.

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So we'll click on set.

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And currently there's no interfaces participating in OSPF.

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So we'll click here on configure interface.

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So for the first one, we're going to go ahead and specify edge one.

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And for the area, we're going to specify area zero.

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So effectively, that means that this logical interface on our tier zero gateway

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using edge

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one and the IP address dot 61, we want it to be included as part of area zero.

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And then we'll leave all the other settings at their defaults and click on safe

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.

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Then over here, it says in progress, we'll go ahead and we'll click on refresh

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there.

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That looks good.
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That looks good.

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And while we're at it, let's also add the other interface provided by edge two.

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And that way, if there's a failover situation, let's add the other logical

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interface, which

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is being provided by edge two.

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So we'll click on configure interface one more time.

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And this time we'll select edge two at dot 62.

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It's going to be in the same exact area and all the other parameters and leave

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at their

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default and click on save.

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Fantastic.

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So go ahead and click on refresh there.

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That looks good.

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Let me scootch this over a little bit.

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So we have the two interfaces, both an area zero network type broadcast.
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So we have the two interfaces, both an area zero network type broadcast.

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OSPF is enabled on both of them.

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Fantastic.

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We'll click on close.

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So just as a confirmation here, it shows us two interfaces configured for OSPF

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and we'll

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click on safe.

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All right, then we'll scroll down and click on close editing.

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And then we'll collapse that.

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So now if we wanted to come in and say, okay, have we formed any OSPF adjac

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encies with

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any other OSPF speakers, what we could do is we could expand this.

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This is our tier zero gateway.

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Scroll down to the OSPF section.

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If it's collapsed, go ahead and expand it.
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If it's collapsed, go ahead and expand it.

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So here in the OSPF section, where it says OSPF neighbors, there's a hyperlink

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for view.

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And if we click right here on view, it'll show us any existing OSPF neighbors.

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And it'll also show us the state.

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So we have full adjacencies.

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It should reflect that as well.

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So we'll go ahead and click on view and check it out.

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We have two OSPF neighbors, but we are in the two way state.

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And the reason for that is look at the two neighbors.

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We are basically peering with each other.

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This is edge one, peering with edge two and edge two, peering with edge one.
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This is edge one, peering with edge two and edge two, peering with edge one.

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However, they are not going into a fully adjacent state.

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And that is because neither one of them is willing to be a designated router.

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And that's why they stopped right there.

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So once we add on our external router and enable OSPF there, then while a

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situation

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where both edges will become fully adjacent with that external router.

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So currently it looks like this.

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Here's our network segment.

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They're both connected.

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So there's edge one and edge two.

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This one's a dot 61.

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This one's a dot 62.
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This one's a dot 62.

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They see each other, but because neither one is willing to be the designated

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router or

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the backup designated router, they are not forming a full adjacency with each

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other.

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So our next step is to go ahead and take our external router.

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We'll go ahead and call R1 just for this purposes here, which is a dot one.

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Enable it for OSPF.

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And when we do, we should have full adjacencies between edge one and R1 and

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full adjacencies

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between edge two and R1.

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At which point, once we have the adjacencies in place, we can then proceed to

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start advertising

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and learning about routing information from each other.
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and learning about routing information from each other.

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So our next logical step is going to be right here.

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And that is to go ahead and prepare the physical environment, make sure we have

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OSPF enabled

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here.

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And we'll do that in the very next video.

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