Azure - vnet peering hops

Question

Hello, in Azure
I have :
virtual network A with a subnet A1
virtual network B with subnet B1
virtual network C with subnet C1

There is a peering between A and B with a custom route table in B1 to route traffic towards A through a network appliance in A.
there is also a peering between B and C. Forwarding has been activated on all peerings.

My question is how do i configure my networks (route tables, peerings, etc) in order to have resources in virtual network C accessing resources in virtual network A ? Is it possible without creating a peering between A and C or without installing a network virtual appliance in network B ?

Answer 1

Hello @sbli ,

Transitive peering is not supported in Azure which means if you peer VNetA to VNetB and you peer VNetB to VNetC, VNetA and VNetC are NOT automatically peered. You must peer VNetA and VNetC to establish communication between VNet A & C.
Please refer : https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-faq#if-i-peer-vneta-to-vnetb-and-i-peer-vnetb-to-vnetc-does-that-mean-vneta-and-vnetc-are-peered

You can find the connectivity options available for Azure resources in below article:
https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-overview#communicate-between-azure-resources

Hope this helps!

Kindly let us know if the above helps or you need further assistance on this issue.

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