Jose Moreno • 12/5/2025

Subnet peering and ExpressRoute

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This technical article investigates the interaction between Azure's subnet peering feature and ExpressRoute. It examines how subnet peering, as opposed to full VNet peering, changes route propagation, specifically for advertising only select subnets to an on-premises network via ExpressRoute. The author provides a practical test setup and command outputs to demonstrate the routing behavior.

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#networking #Azure #Virtual Network
Subnet peering and ExpressRoute

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