AZ-700 Question 120
Select 2Your organization has an existing ExpressRoute circuit with private peering in the East US region under Subscription A. You want to connect a new virtual network (VNet) in the West US region under Subscription B to the same ExpressRoute circuit so that both VNets can reach on-premises resources using the circuit. Which actions should you take to accomplish this scenario?
- A
Generate an ExpressRoute circuit authorization in Subscription A, then share the authorization key with Subscription B
- B
Enable ExpressRoute Global Reach on the existing circuit to link the West US VNet automatically
- C
Accept the authorization key in Subscription B and link the West US VNet to the existing circuit
- D
Configure VNet peering between the West US VNet and East US VNet to share the existing ExpressRoute connection
Show answer and explanation
Correct answers: A, C
Explanation
When sharing an ExpressRoute circuit across subscriptions, the owner of the circuit must create an authorization key that another subscription can use. After retrieving this key, the other subscription uses it to link its VNet to the same ExpressRoute circuit. For detailed instructions, see Microsoft� ExpressRoute documentation at https://learn.microsoft.com/azure/expressroute/expressroute-howto-linkvnet-arm#authorizations.
- A. Correct.
Correct. The circuit owner (Subscription A) must create an authorization key that permits another subscription to attach its VNet to the existing ExpressRoute circuit. This is done in the Azure portal or with PowerShell/CLI commands.
- B. Incorrect.
Incorrect. ExpressRoute Global Reach is a separate feature enabling you to connect on-premises networks via ExpressRoute in different locations. It does not automatically attach a separate subscription� VNet to an existing circuit.
- C. Correct.
Correct. Once Subscription B has the authorization key, it can accept it and link the West US VNet to the existing ExpressRoute circuit. This step completes the connection setup.
- D. Incorrect.
Incorrect. VNet peering is used to interconnect VNets, not to attach a new VNet to an existing ExpressRoute circuit. Peering alone does not provide on-premises connectivity via ExpressRoute.