
Explanation:
1. Create the ExpressRoute circuit
https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-circuit-portal-resource- manager#create-a-new-expressroute-circuit
2. Send a service key to your connectivity provider.
https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-circuit-portal-resource- manager#send-the-service-key-to-your-connectivity-provider-for-provisioning
3. Configure Azure private peering
4. Create a connection from Vnet1 to the ExpressRoute circuit
https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-linkvnet-portal- resource-manager#prerequisites