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What Is A Route Table | Route Table Concept

Updated: Apr 20, 2023

What is a route table

A Route table defines how traffic gets into and out of your subnets, and a Route table contains rules that traffic to your subnets. A Route table contains a set of rules, called routes, that determine where network traffic to your subnets.


In this video, our expert instructor will cover the following:

  • What is Route Table.

  • How the route table works.

  • Route table concepts.

  • Importance of route table.

  • How route table helps in your VPC network.



Route table concepts

The following are the key concepts for route tables.

  • Main route table: The route table automatically comes with your VPC. It controls the routing for all subnets that are not explicitly associated with any other route table.

  • Custom route table: A route table that you create for your VPC.

  • Destination The range of IP addresses where you want traffic to go (destination CIDR).

  • Target The gateway, network interface, or connection through which to send the destination traffic.

  • Route table association: The association between a route table and a subnet, internet gateway, or virtual private gateway.

  • Subnet route table: A route table that's associated with a subnet.

  • Local route table: A default route for communication within the VPC.

  • Propagation: If you've attached a virtual private gateway to your VPC and enabled route propagation, we automatically add routes for your VPN connection to your subnet route tables. This means that you don't need to manually add or remove VPN routes.

  • Gateway route table: A route table that's associated with an internet gateway or virtual private gateway.

  • Edge association: A route table that you use to route inbound VPC traffic to an appliance. You associate a Route table with the internet gateway or virtual private gateway and specify the network interface of your appliance as the target for VPC traffic.

  • Transit gateway route table: A route table that's associated with a transit gateway.

  • Local gateway route table: A route table that's associated with an Outposts' local gateway.


What is the purpose of a route table

The main purpose of a routing table is to help routers make effective routing decisions. Whenever a packet is sent through a router to be forwarded to a host on another network, the router consults the routing table to find the IP address of the destination device and the best path to reach it.

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Very explicit, Prof. We would appreciate more of such, for each topic learnt.

Herbert

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Good job sir, Thanks for this

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