VPC Address Bridging for Overlapping Private Networks
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Solution Overview
Problem
Virtual private clouds (VPCs) with overlapping private network addresses cannot communicate with each other due to address conflicts.
Innovation Solution
A third VPC is used to bridge communication between two VPCs with overlapping private network addresses by configuring address bindings and routing rules, allowing packets to be forwarded through gateways and routers with modified source and destination addresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If private network addresses of VPCs are planned independently, then each VPC can have its own address space, but VPCs with overlapping addresses cannot communicate with each other
Solution Approach 1:
A third VPC is introduced as an intermediary between two VPCs with overlapping private network addresses. The third VPC contains gateway nodes that perform address translation and routing, enabling communication between the first and second VPCs without requiring address space changes in the original VPCs. This mediator approach resolves the address conflict while preserving the independence of each VPC's address planning.
2Reliability
If a third VPC is used to bridge communication between VPCs with overlapping addresses, then communication is enabled, but network complexity increases
Solution Approach 1:
The third VPC serves multiple functions simultaneously: it acts as a communication bridge between VPCs with overlapping addresses, provides routing services through configured gateway nodes, and maintains its own independent network functionality. By making the third VPC multi-functional, the solution enables complex communication scenarios without proportionally increasing overall system complexity.
Data Source
AI summary
A method for configuring virtual private cloud (VPC) communication between a first and second VPC is provided. The first and second VPCs having a same private network address segment. The method includes binding a first VPC private network address with a first address, the first address belonging to the third VPC private network address segment; binding a second VPC private network address with a second address, the second address belonging to the third VPC private network address segment, the first address being different from the second address; configuring a packet source address to be the first address, the packet being sent by the first VPC and destined for the second VPC, using the first address, and configuring a packet destination address to be the second address. A third VPC private network address segment is different from the private network address segment of the first and second VPC.