Functions: Routes traffic between Availability Zones (AZs) within a region.
Connections: Connects different AZs and links the VPC to the Internet Gateway.
Route Tables
Per Subnet: Each subnet has its own route table used for traffic forwarding within the VPC.
External Entries: Route tables can have entries for external destinations.
Limits:
Up to 200 route tables per VPC.
Up to 50 route entries per route table.
Associations:
Each subnet can only be associated with one route table.
A single route table can be assigned to multiple subnets.
Default Behavior:
If no route table is specified, a subnet is assigned to the main route table at creation.
The main route table cannot be deleted, but another route table can be set as the main route table.
Default Routing Rule
Inter-Subnet Communication: There is a default rule that allows all VPC subnets to communicate with one another. This rule cannot be deleted or modified.
Troubleshooting: Issues in communication between subnets are likely due to security group or Network ACL (NACL) settings rather than routing.
Want to print your doc? This is not the way.
Try clicking the ⋯ next to your doc name or using a keyboard shortcut (
Routing in VPC