Route Tables

Route Tables

ℹ️ Information: Route tables control the routing of network traffic within your VPC. This section guides you through configuring route tables to enable communication between peered VPCs.

💡 Pro Tip: Each subnet in your VPC must be associated with a route table, which controls the routing for the subnet. You can associate multiple subnets with the same route table.

Implementation Steps

1. Log in to AWS Management Console
   • Search for VPC
   • Select VPC

2. Edit Route Table
   • Select Route Tables from the left sidebar
   • Select the public route table associated with My VPC: 10.10.0.0/16
   • Click the Routes tab
   • Click Edit routes

3. Add Route for VPC Peering
   • Click Add route
   • Set the Destination to the CIDR block of HG VPC
   • Set the Target to the VPC Peering connection
   • Click Save changes

4. Edit Successfully

5. Repeat for HG VPC
   • Select Route Tables from the left sidebar
   • Select the public route table associated with HG VPC
   • Click the Routes tab
   • Click Edit routes

6. Add Route for VPC Peering
   • Click Add route
   • Set the Destination to the CIDR block of My VPC: 172.31.0.0/16
   • Set the Target to the VPC Peering connection
   • Click Save changes

7. Verify Configuration
   • Ensure both route tables have routes for the peered VPCs
   • Test connectivity between EC2 instances in both VPCs

🔒 Security Note: Regularly review and audit your route tables to ensure they only allow necessary traffic between VPCs.

⚠️ Warning: Incorrect route table configurations can lead to network connectivity issues. Always test connectivity after making changes.

💡 Pro Tip: Document your route table configurations and their purposes to maintain clear network policies and facilitate troubleshooting.