ExpressRoute workflows for circuit provisioning and circuit states

This page walks you through the service provisioning and routing configuration workflows at a high level.

circuit workflow

The following figure and corresponding steps outline the tasks to provision an ExpressRoute circuit end-to-end.

  1. Use PowerShell to configure an ExpressRoute circuit. Follow the instructions in the Create ExpressRoute circuits article for more details.

  2. Order connectivity from the service provider. This process varies. Contact your connectivity provider for more details about how to order connectivity.

  3. Ensure that the circuit has been provisioned successfully by verifying the ExpressRoute circuit provisioning state through PowerShell.

  4. Configure routing domains. If your connectivity provider manages Layer 3 configuration, they will configure routing for your circuit. If your connectivity provider only offers Layer 2 services, you must configure routing per the guidelines described in the routing requirements and routing configuration pages.

    • Enable Azure private peering - Enable this peering to connect to VMs / cloud services deployed within virtual networks.

    • Enable Microsoft peering - Enable this to access Microsoft online services, such as Office 365. All Azure PaaS services are accessible through Microsoft peering.

      Important

      You must ensure that you use a separate proxy / edge to connect to Microsoft than the one you use for the Internet. Using the same edge for both ExpressRoute and the Internet will cause asymmetric routing and cause connectivity outages for your network.

      routing workflows

  5. Linking virtual networks to ExpressRoute circuits - You can link virtual networks to your ExpressRoute circuit. Follow instructions to link VNets to your circuit. These VNets can either be in the same Azure subscription as the ExpressRoute circuit, or can be in a different subscription.

ExpressRoute circuit provisioning states

Each ExpressRoute circuit has two states:

  • Service provider provisioning state
  • Status

Status represents Microsoft's provisioning state. This property is set to Enabled when you create an Expressroute circuit

The connectivity provider provisioning state represents the state on the connectivity provider's side. It can either be NotProvisioned, Provisioning, or Provisioned. The ExpressRoute circuit must be in a Provisioned state in order configure peering.

Possible states of an ExpressRoute circuit

This section lists out the possible states of an ExpressRoute circuit.

At creation time

The ExpressRoute circuit will report the following states at resource creation.

ServiceProviderProvisioningState : NotProvisioned
Status                           : Enabled

When connectivity provider is in the process of provisioning the circuit

The ExpressRoute circuit will report the following states while the connectivity provider is working to provision the circuit.

ServiceProviderProvisioningState : Provisioning
Status                           : Enabled

When connectivity provider has completed the provisioning process

The ExpressRoute circuit will report the following states once the connectivity provider has successfully provisioned the circuit.

ServiceProviderProvisioningState : Provisioned
Status                           : Enabled

When connectivity provider is deprovisioning the circuit

If the ExpressRoute circuit needs to be deprovisioned, the circuit will report the following states once the service provider has completed the deprovisioning process.

ServiceProviderProvisioningState : NotProvisioned
Status                           : Enabled

You can choose to re-enable it if needed, or run PowerShell cmdlets to delete the circuit.

Important

A circuit cannot be deleted when the ServiceProviderProvisioningState is Provisioning or Provisioned. The connectivity provider needs to deprovision the circuit before it can be deleted. Microsoft will continue to bill the circuit until the ExpressRoute circuit resource is deleted in Azure.

Routing session configuration state

The BGP provisioning state reports if the BGP session has been enabled on the Microsoft edge. The state must be enabled to use private or Microsoft peering.

It is important to check the BGP session state especially for Microsoft peering. In addition to the BGP provisioning state, there is another state called advertised public prefixes state. The advertised public prefixes state must be in the configured state, both for the BGP session to be up and for your routing to work end-to-end.

If the advertised public prefix state is set to a validation needed state, the BGP session is not enabled, as the advertised prefixes did not match the AS number in any of the routing registries.

Important

If the advertised public prefixes state is in manual validation state, you need to open a support ticket with Microsoft support and provide evidence that you own the IP addresses advertised along with the associated Autonomous System number.

Next steps