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I was trying to set up VPC peering in AWS. I got most of it working but the network connectivity didn't work. I narrowed down the difference to the routes.

In my previous working system I had the VPC peering route in the main routing table, but when I terraformed a new system I tried to create a separate routing table with the VPC peering route but that didn't work.

I had to manually go to AWS console to add the route on the main route table for the communications to work.

Archimedes Trajano
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1 Answers1

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Main route table controls the routing for all subnets that are not explicitly associated with any other route table

If your subnet is associated with a custom route table, put the peering route in the associated route table

https://docs.aws.amazon.com/vpc/latest/userguide/VPC_Route_Tables.html

exeral
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