The initial deployment to the core router device in your ISN fabric in this section will be a small amount of configuration, specifically the BGP routing process with the ASN you input into the External Fabric's Fabric Settings.

Step 1 - Trigger Initial Deployment for Your Core Router

At the top right of the ISN fabric, locate the fabric-level Actions button:

1. Click Actions
2. Click Recalculate and Deploy

Step 2 - Deploy Initial Config

In the Deploy Configuration wizard, you can visually see that not many lines of configuration are required to be configured to your ISN fabric core device.

1. In the bottom right, click Deploy All

Step 3 - Exit Deploy Configuration

Upon a successful deployment, NDFC's Deploy Configuration wizard should look as shown in the screenshot below; all green with SUCCESS messages and each switch's expected configuration progress bar also displaying as green and fully executed. If any error occurred, NDFC will display a notification and the status reverted back to Out-of-Sync.

1. After done reviewing the deployment progress, click Close in the bottom right

Step 4 - Review Switches Overview

Back at the main Switches overview, your Core-Rtr device should display a Config Status of In-Sync.

Step 5 - Return to Main Overview Dashboard After Initial Deployment

Revisist the main Overview dashboard and now examine what the dashboard is populated with after initial deployment.

1. Click Overview

Notice the Switch Configuration status and Switch Roles information is updated and in a healthy state. Again, like your ExtL3 fabric, the Interfaces area of the dashboard is populated with lots of interfaces. There are many due to the core router device being a Nexus 9300v.

Continue to the next section to start creating the fabric for MultiSite where you will leverage this ISN fabric for the connectivity between your Site1 and Site2 fabrics via each fabric's respective border gateway leaf switch.