VPC Router

Nov 5, 2022

• Aws
• Aws networking

• AWS Wiki
• VPC
• Internet Gateway

• Every VPC has a VPC Router - Highly available
• In every subnet .. ’network+1’ address
• Routes traffic between subnets
• Controlled by ‘Route Tables’, each subnet has one
• A VPC has a Main route table - subnet default

• A Route Table controls what happens to data as it leaves the subnet or subnets that that Route Table is associated with.
• Route Tables are a list of routes, attached to 0 or more subnets.
• A subnet has to have a route table, which is either the main route table of the VPC, or a custom one that you’ve created.
• Local routes are always there, uneditable and match the VPC IPv4 or IPv6 CIDR Range. For anything else, higher prefix values that are more specific, take priority.
• Each entry on a route table has a Destination and Target
• If the target is local, that means that the route is to the VPC itself
• All route tables have at least one route, the local route. The local route matches the VPC CIDR range.