Explain why VNet peering is not transitive by default and describe a scenario in which this non-transitivity impacts traffic routing between multiple spoke VNets in a hub-and-spoke architecture.

Question

Thamimul ansari · Accepted Answer

Azure VNet peering is not transitive by default, meaning that if VNet A is peered with VNet B, and VNet B is peered with VNet C, VNet A and VNet C cannot directly communicate with each other through VNet B. This is by design, as VNet peering establishes a direct, point-to-point connection between two virtual networks, and does not automatically extend routing capabilities to other peered networks.

Explain why VNet peering is not transitive by default and describe a scenario in which this non-transitivity impacts traffic routing between multiple spoke VNets in a hub-and-spoke architecture.

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