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Zorluk: OrtaConfigure Virtual Network Peering

You have three Azure virtual networks: VNet-Production (10.50.0.0/1610.50.0.0/16), VNet-Shared (10.60.0.0/1610.60.0.0/16), and VNet-Database (10.70.0.0/1610.70.0.0/16). VNet-Production is peered with VNet-Shared, and VNet-Shared is peered with VNet-Database. No virtual network gateways or network virtual appliances are deployed in the virtual networks. Statement: A virtual machine deployed in VNet-Production can communicate with a virtual machine deployed in VNet-Database over the peering connections. Is this statement true or false?

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The statement is false because Azure virtual network peering is non-transitive by default, meaning traffic from VNet-Production cannot pass through VNet-Shared to reach VNet-Database.
The correct answer is false because virtual network peering in Azure is non-transitive. Even though VNet-Production is peered with VNet-Shared, and VNet-Shared is peered with VNet-Database, traffic originating from VNet-Production cannot traverse VNet-Shared to reach VNet-Database. A direct peering link or a transit routing mechanism (like a gateway or network virtual appliance) is required to establish communication.

Adım Adım Çözüm

1
Analyze the network topology and peering links.
VNet-Production is peered with VNet-Shared, and VNet-Shared is peered with VNet-Database. No direct peering exists between VNet-Production and VNet-Database.
This establishes that any communication path between VNet-Production and VNet-Database must traverse VNet-Shared.
2
Evaluate the default transitivity rules of Azure virtual network peering.
Virtual network peering is strictly non-transitive.
This determines whether traffic can flow through VNet-Shared to reach another peered network without a gateway or router.
3
Check for transit routing configurations in the scenario.
No virtual network gateways or network virtual appliances are deployed.
Without transit routing capabilities, traffic between VNet-Production and VNet-Database is blocked at VNet-Shared.

Anahtar Kavram

Virtual network peering is non-transitive. To route traffic through a transit hub network, you must configure a VPN gateway or a Network Virtual Appliance (NVA) alongside User-Defined Routes (UDRs).
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