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Hello and welcome.

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My name is Keith Barker.

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And up to this point, we've been focusing primarily

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on the concept of the distributed router inside of NSX

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that can provide the routing for east west traffic

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also with a tier-0 and a couple tier-1 gateways.

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We could also route all the way through them

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from VMs on one segment over to another.

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And one of the really cool things

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about a distributed router, a DR,

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is that it can exist

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on all of our transport nodes that need to have it.

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For example, ESXiA and ESXiB,
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For example, ESXiA and ESXiB,

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they've got the distributed router component.

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Our edge devices,

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they have copies of that distributed router

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for T0 and a couple T1s.

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And again, up to this point,

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that's been our primary focus

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about working with and configuring

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and then verifying those distributed routers.

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However, there comes a time in every network's life

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when we need to have some other services.

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For example, we may wanna set up network address translation

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at one of our tier-0 gateways.

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And for those network services,

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including network address translations,

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stateful firewall, and VPNs,
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stateful firewall, and VPNs,

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we need an additional component

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on those devices providing those services,

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and that extra component

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for those additional network services

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is referred to as a services router.

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So think of the distributed router

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as the routing information on how to get places

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and how to forward traffic.

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And we can think of the services router component,

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even if it's on the same logical router,

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we can give the services router as the component

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that's gonna provide those services.

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For example, provide network address translation

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or provide VPN services or a gateway based firewall.
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or provide VPN services or a gateway based firewall.

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Another time the services router comes into play

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is if we're gonna be accessing

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the actual physical external network.

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So we may have VMs down here in our segments,

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and they wanna be able to route

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with east-west traffic, no problem,

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but also, they may need to get access

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out to the physical network in our topology

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or beyond that to the internet.

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And anytime we're gonna bridge our NSX routed environment

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with a physical environment,

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that also is going to invoke a services router function

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on that router, on that gateway

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that's providing that service

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from the logical NSX routed environment
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from the logical NSX routed environment

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over to the physical network.

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So in this guild, we're gonna do this.

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We're gonna take our existing topology,

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which currently has three routers,

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two tier-1s and one tier-0,

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and at the tier-0,

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we are going to add on top of its responsibilities,

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connections out to the physical network

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on behalf of the internal routed environment.

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That way a VM like VM1, if it needs to or wants to,

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can get access not just to the NSX routed networks,

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but also out to the physical network as well.

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And, again, to do that,

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when we add that additional functionality

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for connectivity or bridging out to the physical network,
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for connectivity or bridging out to the physical network,

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that is going to require a services router component

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inside of our NSX.

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So join me in the next video

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as we take a big picture look at our overall process,

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we'll follow it up with a game plan,

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and then what you and I get to do

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is both implement and verify as we go.

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So I'll see you, my friend, in the very next video.
