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Creating and Managing Overlay Fabrics

You can create and manage overlay fabrics from the Manage Overlay Fabrics page.

Before You Begin

Before you begin, make sure that you have at least one Layer 3 Fabric based data center in Network Director.


To open the Manage Overlay Fabrics page:

  1. Open the Datacenter View in Network Director.
  2. Select the Layer 3 Fabric based data center from the View pane and select Overlay Networks Builder > Manage Overlay Fabrics from the Tasks pane.

    The Manage Overlay Fabrics page opens. Table 187 describes the fields that are displayed in the Manage Overlay Fabrics page.

    Table 187: Manage Overlay Fabrics Field Descriptions




    Name of the overlay fabric.


    Description for the overlay fabric.

    Autonomous System No.

    The autonomous system number given for the overlay fabric.

    Autonomous system (AS) is a collection of devices that act as a single administrative entity, such as an overlay fabric. Each autonomous system is assigned a unique autonomous system number. In BGP routing, AS numbers are used to uniquely identify a network on the Internet.

    Route Reflector Network Address

    IP address of the route reflector device.

    Route reflector devices have the ability to readvertise routes learned from an internal peer to other internal peers. Therefore, rather than all internal peers of the fabric to be fully meshed with each other, route reflection requires that only the route reflector be fully meshed with all internal peers. The route reflector and all of its internal peers form a cluster.

    Layer 3 Fabrics

    The Layer 3 Fabrics that is part of the overlay fabric.

    Deployment State

    Deployment status of the overlay fabric. Deployment state can be one of the following:

    • Pending Deployment—The fabric details have been saved, but not deployed.
    • Deployment in progress—The fabric is being deployed on the Layer 3 Fabric.
    • Partially deployed—The overlay fabric is successfully deployed on some devices, and the deployment failed on the other devices.
    • Deployed—The overlay fabric is successfully deployed on all the devices.
    • Deploy failed—Deployment failed on all devices.
    • Pending decommission—The overlay fabric is deleted. There might be a slight delay for Network Director to apply the changes to the devices; the system displays this status during this time.

From the Manage Overlay Fabrics page, you can:

Creating an Overlay Fabric

You can create an overlay fabric by following the steps given in this section. Alternatively, you can create an overlay fabric inline while you create a tenant.


To create an overlay fabric:

  1. Click Add in the Manage Overlay Fabrics page.

    The Create Overlay Fabric window appears.

  2. Enter a name and description for the overlay fabric.
  3. Specify the autonomous system (AS) number for the overlay fabric. You can specify the AS number in the range 1 to 4294967295.
  4. Specify the IP address and the subnet mask of the route reflector device in the overlay fabric.
  5. Select the Layer 3 Fabric that you want to include in the overlay fabric from the Available list and click the arrow to add it to the overlay network. Network Director lists all the Layer 3 Fabrics that are part of the data center and available for assignment in the Available list.

    Note: You must have at least one Layer 3 Fabric available when you create an overlay fabric. To create a Layer 3 Fabric, follow the procedure given in Creating Layer 3 Fabrics.

  6. Click OK to create the overlay fabric.
  7. Click Preview & Deploy to deploy the overlay configuration.

After you have created or deployed the overlay configuration, you can create a tenant. See Creating and Managing Tenants for the procedure to create a tenant.

Modifying an Overlay Fabric


To modify an overlay fabric:

  1. Select the overlay fabric in the Manage Overlay Fabrics page and click Edit. The Edit Overlay Fabric page appears.
  2. Modify the overlay fabric details. You can modify the Description, Autonomous System Number, Route Reflector Network Address, and the Layer 3 Fabric. By modifying Layer 3 Fabric, you can assign a new Layer 3 Fabric to the overlay fabric or delete a Layer 3 Fabric from the overlay fabric.

    Note: You cannot delete a Layer 3 Fabric that has tenants created in the overlay network. You must remove all the tenants from the Overlay Fabric before you can delete the Layer 3 Fabric.

Viewing Overlay Fabric Configuration Details

After you have successfully deployed an overlay fabric, you can view the configuration details of the overlay fabric from the View Overlay Fabric Configuration page. Click the Deployed, Partially Deployed, or the Deploy Failed link corresponding to the overlay fabric under the Deployment State column in the Manage Overlay Fabrics page to open this page.

The View Overlay Fabric Configuration page displays configuration details as described in Table 188.

Table 188: View Overlay Fabric Configuration Details



Overlay Fabric Name

Name of the overlay fabric for which the configuration details are being viewed.


Description of the overlay fabric.


Device list mapped to the overlay fabric.

Element Name

Name of the instance mapped to the overlay fabric.


Configuration details of the device for the element (for example, Overlay Fabric).


Deployment status of the overlay fabric.

Error Message

Error message for a failed deployment.

Note: The error message is visible when the user clicks the hyperlink under the status column.

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