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Azure Networking Blog
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Introducing Subnet Peering in Azure

amitmishra's avatar
amitmishra
Icon for Microsoft rankMicrosoft
Apr 14, 2025

Subnet peering capability lets users peer specific subnets across local and remote VNETS to conserve IPv4 address space through re-use, limit unnecessary exposure of non-peered subnets across hub gateways and implement IPv6 only peering for dual stack subnets.

  Subnet peering refers to a method of connecting two Virtual Networks (VNETs) by linking only the subnet address spaces rather than the entire VNET address spaces. It lets users specify which subn...
Updated Apr 14, 2025
Version 1.0
azure networking
virtual network
brgsstm's avatar
brgsstm
Copper Contributor
May 16, 2025

I assume these subnet level peerings are non-transitive, i.e. you cannot access the overlapping subnets in the remote VNET by way of the peered subnet?  In my head that could never work as the overlapping address space is never advertised via BGP?

On that topic, if you were to place a NIC in a VNET C/Subnet5 and that NIC needed to route traffic to 10.1.1.0/24, would it route to VNET A or VNET C