Route Table

A deep dive into Routing Table - Practical ver.

What is Route Table?

• A routing table affects subnets

• A routing table is dependent on the VPC

  • However, a single routing table can be associated with two or more subnets

    • That's why public subnets and DB subnets use the same routing table!

      • However, private subnets use separate routing tables to prepare for NAT gateway failures!

Route Table in Private Subnet

• In the case of private subnets

  • If FROM is internal and TO is external, you can configure routing through the route table

  • But if FROM is external and TO is internal, it won't work!

    • You must configure it to go through a Public LB!