Hi, everyone, and welcome back.
Now in today's video will be going through some of the important concepts related to the transit gateway.
Now, whenever you start with a practical associated with the transit gateway, your concepts should
be clear.
Once it is done, it will be much more easier to set up the entire configuration.
Now, the first important concept is related to the transit gateway attachment.
One important part that we need to note is that transit gateway can have multiple set of attachments.
So you can attach a VPC, you can attach a direct connect connection, you can attach a site to site
VPN and so on.
And once there are attachments that are connected, you will be able to establish the communication
between each other as well.
All right.
So this is one important part.
Now, generally, when the transit gateway is created and available, the next important step that you
will generally do is to attach a specific set of resources to the transit gateway.
Now, let me also quickly show you so we have the Demo transit Gateway that is available here.
Now, if you see once the transit gateway is generally created, then you can go ahead and attach multiple
set of resources.
So in this use case, I have two attachments which are of VPC.
So both of the VPC are attached to the transit gateway.
Now, since both the VPC are attached to the transit gateway, you will be able to achieve the use case
of internal communication between these VPC.
All right, So this is one important part.
Now, whenever you create an attachment, as we're discussing, you can attach multiple set of entities,
VPC being the one.
You can also attach a VPN, you have a peering connections and so on.
The second important concept is related to the transit gateway route table.
In case if you're familiar with the VPC route table transit Gateway route table will be very simple
to understand, which basically defines how the traffic is routed between the connected resource.
Now at this stage you see that there are two connected resource with the appropriate set of attachment.
So the one 7216 VPC is associated with attachment A 192 168 is associated with attachment B, so any
traffic that wants to go towards the one 7216 CIDR block, this traffic should be routed via attachment
A as seen in the root entry.
Similarly, any traffic going to 192 and 68 should go towards the attachment B So this is a very high
level overview about the transit gateway routing.
But let's also quickly look into it.
Now generally, if we quickly go a bit down, you have the transit gateway route tables.
Now, if you'll quickly look into the routes here, there are two routes.
One is the one 7231 route here and second one is the 192 168.
In case, if you would like, you can also create multiple set of static routes depending upon how you
want the traffic to be directed.
So once you have understood both of these concepts, you will be able to go ahead and perform the transit
gateway.
We will not be creating the transit gateway.
In today's video, the main aim is to understand the concepts post, which will be discussing things
practically in more detail.
So with this will conclude today's video.