Connecting two Different Azure regions

Hi @Anil Kumar Jakka ,

Thank you for reaching out to Microsoft Q&A Forum.

As I understand you have two different VNET one in each region and you wish to connect both of them. VNET's have IP overlapping.

1. The one option is using Virtual Network Gateway (VPN gateway) with NAT Feature. https://learn.microsoft.com/en-us/azure/vpn-gateway/nat-overview
2. You can do the same with any Third-party Virtual Appliance (NVA). However, with Azure Native product like VPN gateway you get many benefits.
3. To some extent Azure Private Link can help you, but you need to check explore the suitability of it.

https://learn.microsoft.com/en-us/azure/private-link/

Let's know which option you tried and did it help you . Please vote if teh above answer helped you to resolve the issue.

Hello Anil Kumar Jakka

• You can consider using Site-to-Site or VNET-to-VNET connection between your Spoke VNETS and Hub VNET with NAT and BGP Enabled
  • See : About NAT on Azure VPN Gateway
  • See : About BGP and VPN Gateway
• Enabling NAT is to solve the problem of overlapping address ranges
• Enabling BGP is to have transit routing to OnPrem via the VPN Gateway
  • 
  • More configuration info on How to configure BGP for Azure VPN Gateway

NOTE:

• This means, you have to deploy VPN Gateways in all the Spoke VNETs
• And also, you must consider the maximum number of connections the Hub Gateway SKU can support
  • See : Gateway SKUs comparison
• Global VNet Peering is not suitable for overlapping IPs because it does not support NAT.
• NAT Gateway in Azure is for outbound internet traffic only, not for VNet-to-VNet NAT.

Additionally, you can use vWAN in scenarios where you need more than 100 S2S VPN tunnels.

I hope this was helpful!

If the above is unclear or you are unsure about something, please add a comment below.