Create a Backbone Virtual Circuit

This article covers how to create a backbone virtual circuit. For information on our other virtual circuit options, see:


You need at least two provisioned ports to create a backbone connection. For more information, see Create a Port.

Create a backbone connection

  1. Log in to the PacketFabric portal. From the dashboard, click Virtual Circuit under Create Services:


  2. Select Backbone Connection.

Complete the following fields:

Select Source Interface

Select your source interface.

Click Toggle Details to view information about any virtual circuits already associated with that port.


Select Destination Interface

Select your destination interface.

Unlike when creating a dedicated point-to-point connection, the speed and optic do not have to match the source interface.

Select Pricing Plan

Select a billing account and then one of the following options:

Longhaul Dedicated
You are billed a set amount each month, regardless of how much data you transfer.

If you select this option, you are also asked to specify the speed and contract length.

NOTE: At this time, we only limit the speeds you can select to the lowest speed between your source and destination interfaces. For example, if you are building a virtual circuit between a 1 Gbps port and a 10 Gbps port, you cannot select more than 1 Gbps as your speed.

However, you are ultimately responsible for not overburdening your ports (for example, creating three 10 Gbps virtual circuits between two 10 Gbps ports). Keep that in mind as you select a speed.

If you select a low speed and later decide you want more capacity, you can add burst capacity or upgrade your virtual circuit. If you allocate too much capacity, you can later set or edit rate limits for the circuit.

You can view the speeds for each virtual circuit associated with a port from the port details page.

Longhaul Usage-based
You are billed based on how much data you transfer. This is a month-to-month plan.
Longhaul Hourly
You are billed by the hour and can cancel any time.
Aggregate Capacity
Aggregate capacity allows you to purchase capacity in bulk. You will need to first create an aggregate capacity container. For more information, see Aggregate Capacity.

If you select this option, your virtual circuit will have no additional cost and you will not select a contract term. You can cancel at any time. You can also upgrade and downgrade capacity as needed.

NOTE: If you do not see this option, it might be because of the following reasons:

  • You have not created an aggregate capacity container.
  • Your A and Z side locations are in the same metro.
  • Either your A or Z side is location outside of the U.S.
VC Confirmation
VC Description
Provide a meaningful name for the virtual circuit.
VC Parameters
Specify a VLAN ID for both your source and destination interfaces or disable VLAN tagging. At least one end must have a VLAN tag.

If the virtual circuit includes an ENNI, then you can also add an S-VLAN tag. For more information, see ENNI Ports.

You can manually enter the ID or click Next Available. If you click Next Available, we find the highest in-use VLAN ID and increment by one. For example, if the highest in-use ID is 15, this field autopopulates with 16. By default, these fields are already populated with the next available VLAN ID. You can always change VLAN IDs by editing the virtual circuit.

TIP: Expand Advanced Configuration Options below to review prior VLAN ID allocations.
IMPORTANT: Ports that are on EFR devices cannot have a mix of tagged and untagged VLANs. If you are planning to provision multiple virtual circuits on an EFR port, you must keep VLAN tagging enabled for both ends. You can check whether a port is on an EFR device from its details page. For more information, see VLAN Tagging.
Advanced Configuration Options

From here you have the option to make your virtual circuit an Ethernet Private Line (EPL). EPL connections have extended functionality, but are single-point connections. This means you cannot land an EPL on a port that has any other connections (virtual circuits, cloud connections, etc.).

For more information about the differences between EPL and EVPL, see Virtual Circuit Ethernet Features and Ethernet Service Specifications.

Review your information. When everything is correct, click Place Order.

Create a Backbone Virtual Circuit - POST