I want to implement multicast through AWS Transit Gatway within the same VPC.

Question

Hello :) I am now a new cloud junior developer.
There are still many things I don't know, so I'm posting a question to ask for help.

I'm curious about **AWS Transit Gateway.**
I want to implement multicast. However, in **AWS, it is instructed to use it through Transit Gateway.**

My current SW situation is as follows.

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1. There are two servers with two subnets in one VPC.
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2. Is it possible to implement multicast between servers in number 1?
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3. Is multicast used in AWS only possible if the VPC band is different? Or is multicast possible between servers in the same VPC?
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4. If multicast is possible within the same VPC, how should it be done? 
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**I would like to receive a detailed answer to questions 1 to 4.**  
**If you can explain the content or have additional reference material, please share.**

I'm still a junior level developer so I don't know much, so I'm asking for help.
I'd be very grateful if you could help me.

Thank you. :)

mahankali vamseekrishna · Answer

Implementing multicast within a single Virtual Private Cloud (VPC) using AWS Transit Gateway is possible Here's is an reference architecture:

https://docs.aws.amazon.com/vpc/latest/tgw/tgw-vpc-attachments.html 
once go through these ....

Sivaraman Selvam · Answer

Hello,

Implementing multicast within a single Virtual Private Cloud (VPC) using AWS Transit Gateway is possible Here's is an reference architecture:

https://d1.awsstatic.com/architecture-diagrams/ArchitectureDiagrams/transitgateway_multicast_ra.pdf?did=wp_card&trk=wp_card

To read more about Multicast in Transit gateway refer the documentation:

https://docs.aws.amazon.com/vpc/latest/tgw/tgw-multicast-overview.html

Additionally refer this blog post: https://aparna-m2593.medium.com/multicast-in-aws-using-aws-transit-gateway-65161ab9f47d

To implement multicast using a new Transit Gateway (TGW), follow these steps:

1. Create a new Transit Gateway and enable multicast.
2. Create a multicast domain within the TGW.
3. Associate VPC attachments to the multicast domain and select the subnets to include.
4. Create a multicast group and choose the ENIs for the multicast senders.
5. Register members to the multicast group as multicast receivers.

I want to implement multicast through AWS Transit Gatway within the same VPC.

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