VPC Peering (Virtual Private Cloud Peering) is a networking
connection between two Virtual Private Clouds (VPCs) that allows them to
communicate privately as if they are part of the same network. VPC Peering
allows the transfer of resources, data, and traffic between two VPCs using
private IP addresses without needing internet gateways or VPNs.
When would you use VPC Peering?
You'd use VPC Peering in the following scenarios:
1. Inter-VPC Communication: When you need to connect two or
more VPCs for resource sharing, like databases in one VPC and application
servers in another.
2. Multi-Account Architecture: If you manage multiple AWS
accounts with separate VPCs, VPC Peering lets you establish a secure connection
between those accounts.
3. Access to Shared Services: When you want to share
services like logging, monitoring, or security tools from one VPC to another.
4. Cross-Region Communication: If you want VPCs in different
AWS regions to communicate securely (using Cross-Region VPC Peering).
5. Centralized VPC for Multiple Projects/Teams: If your
organization has separate teams working on different projects but needs
centralized access to some resources or shared services.
Key Points to
Remember
- VPC Peering is a one-to-one connection and doesn’t support
transitive peering.
- Both VPCs should not have overlapping IP address ranges.
- It's not limited to a single AWS account—you can peer
across accounts and regions too.
Would you like more details on how to set it up?
