Description

A Central Transit VPC is a hub-and-spoke network topology in AWS where a single VPC (the central VPC) acts as a transit hub to interconnect multiple other VPCs (spokes). This architecture simplifies management and routing of traffic between VPCs and on-premises networks.

Features

• Hub-and-Spoke Architecture: Centralizes network connectivity in a single VPC, simplifying routing management.
• Secure Communication: Ensures secure communication between connected VPCs using VPN or AWS Direct Connect.
• Scalability: Easily scales to connect multiple VPCs and on-premises networks.
• Centralized Management: Provides a centralized point for managing network traffic, security policies, and monitoring.
• Redundancy and Failover: Supports high availability and redundancy through multiple VPN connections and routing policies.

Limitations

• Single Point of Failure: The central VPC can become a single point of failure if not properly architected with redundancy.
• Complex Setup: Requires complex configuration and management, especially as the number of connected VPCs grows.
• Latency: May introduce additional latency due to the centralization of traffic.
• Cost: Additional costs for data transfer, VPN connections, and AWS Transit Gateway usage.

Use Cases

• Multi-Region Applications: Centralizes traffic management for applications deployed across multiple AWS regions.
• Hybrid Cloud Environments: Integrates on-premises networks with multiple AWS VPCs through a single transit hub.
• Inter-VPC Communication: Simplifies and secures communication between multiple VPCs in different AWS accounts or regions.