Nightmare: Connecting Production VPCs with Overlapping CIDRs

Connect VPCs with Overlapping IP Ranges — Without NAT, Renaming, or Complex Routing

TL;DR: Connect Overlapping VPCs Without the Pain

• Subnet overlaps between VPCs are inevitable, default IP ranges like 172.31.0.0/16 cause conflicts across accounts, regions, and partners.
• Traditional fixes like NAT, CIDR renumbering, and proxies are disruptive, complex, and hard to scale.
• noBGP connects VPCs privately even with overlapping IPs, with no need for NAT, IP renaming, or complex routing.
• Setup is simple: deploy noBGP code in each VPC, no public IPs, no subnet translation, no infrastructure changes.
• Ideal for DevOps, cloud architects, and IT teams who need conflict-free, scalable multi-VPC networking.

If you’re running multiple VPCs across AWS accounts, regions, or environments, subnet overlap and conflicting CIDR ranges are inevitable. Maybe your team used the default 172.31.0.0/16 CIDR block in staging and production. Or maybe a partner’s VPC has the same IP range as yours. Now what?

VPC peering fails. Connectivity breaks. Your options are limited.

You could:

• Try renumbering the CIDRs (disruptive and risky)
• Add NAT and proxy layers (complex and brittle)
• Build isolated workarounds (slow and hard to scale)

Or you can deploy noBGP.

✅ noBGP Solves Overlapping VPC Subnet Conflicts Instantly

noBGP creates private connections between overlapping VPC networks, even when CIDR blocks conflict — without requiring subnet changes or NAT workarounds. It just works.

• 🚫 No need to re-IP or rename VPC CIDRs
• 🔒 No NAT, VPN, or tunneling setup required
• 🔄 No impact to your existing infrastructure

🧠 No deep networking knowledge needed

🔧 How It Works

1. Sign-up for a noBGP account
2. Deploy code in each VPC
3. Connect securely without public IPs or subnet translation

Whether it’s two VPCs or twenty, across accounts, clouds, or teams, noBGP lets you build connections without conflict.

👨💻 Who This Is For

This is for:

• DevOps teams managing multi-account AWS environments
• Cloud architects hitting CIDR collision limits
• Platform engineers who’ve run into VPC peering restrictions
• IT teams building staging, QA, or partner networks with overlapping IPs

🚀 Ready to eliminate VPC subnet overlap headaches?

Start building smarter, conflict-free VPC connectivity, without changing a single IP address.

👉 [Try noBGP free] or [Get a demo]

FAQ

❓ Can I peer two VPCs with the same IP range?

Not with AWS VPC peering, it will fail. But noBGP allows you to connect overlapping CIDRs without renaming or NAT.

❓ What’s the default AWS VPC IP range?

By default, AWS VPCs use 172.31.0.0/16, which often leads to CIDR block conflicts when multiple environments are created.

❓ Does this replace VPN or NAT gateways?

Yes. noBGP eliminates the need for NAT or VPNs when connecting private VPCs, no overlapping subnet issues.