Let us understand.
Service road.
Now we have a study about the DEA that is the distributor okay and we come to know that distributor
rota is not a VM but it's a kernel module installed over hypervisor but what is happening that if you
have different type of traffic requirement that means are some services that annex XP are not distributed
which type of services due to locality or a state full nature.
So you want some some type of services like physical infra connectivity NAC ECP server load balancing
VPN gateway firewall browsing service interfaces metadata a proxy for openness track.
So these are the services that are separated from the routing capabilities.
So for that you need access to a program for that you need extra set of modules.
And that's the reason we have something called Edge node.
Now what is happening this edge node so the appliance with the centralized services or is are instances
are hosted are called Edge node so those nodes they don't have one leader is are but they can have idea
as well.
So let me show you the diagram.
Let me go to the next slide.
So here you can see in the diagram that clearly when you see this particular say for example your edge
Node 2 edge node having is our capability and DL capability both the capabilities they have.
This is a logical diagram where we have the segments connected to a certain idea but if you go and check
the physical topology it will be very much clear.
So I have my hypervisor where I have the distributed router and we have a study in the previous section
that how the packet flow it will help basically in NSX.
It is recommended that they are doing the routing lookup near to the source and that's the key routing
lookup near to the source.
Now if you see here the edge node edge node having the DIA edge node having the SRO as well.
Now if we focus on is R you can see that is are having connectivity that is the external connectivity
means is our is there who can do the north to south routing lookups.
Now here you can see that Assad is connected with various logical switches as well.
And one is spatial connectivity in orange color you can see that is the transit segment connectivity
that is nothing but the intra year transit link.
So that means that this is are having various type of interfaces and connectivity hairdos interfaces
are listed.
So they have the external interface which is supporting a static routing and BGP to learn or advertise
the network they have service interface that will go and connect with the will and segment then they
have the intra tier transit link which is what this is doing is like the connectivity between the d
r and SL So that means that the user and they said they are doing some interconnectivity and clearly
you can see here that a transit overlay segment is aka plumbed between India and Acer and each gets
IP in the range of 1 6 9 2 5 4 0 0 0 last twenty five subnet by default this access range is configurable
and can be changed if this particular subnet is used somewhere else in the network.
And then finally they have the linked segment that link segment interfaces that has got connected with
the overlay segment right.
So now we can draw some conclusion here that is R is there then that is hosted over the edge node is
R is there for these particular services these list of services n is are having these four interfaces
now we can stop here and in the next section we will see that with help of as are how the packet is
flowing from is R to the external network an external network to the etc.