The initial deployment with Recalculate & Deploy will configure both your border gateways and your ISN core router with the best practice configuration. The configuration between the fabrics and the ISN follow this design: I-E-I, which means iBGP - eBGP - iBGP. Your Site1 and Site2 are iBGP-based fabrics as you're already aware. The peering from the border gateways to the ISN core router will be eBGP.

Step 1 - Trigger Initial MultiSite Deployment

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

1. Click Actions
2. Click Recalculate and Deploy






After clicking Recaculate and Deploy, NDFC will generate the configuration based on best practices per role type from templates and your user input when you created the fabric initially.

Step 2 - Deploy Initial MultiSite Config

In the Deploy Configuration wizard, you can visually see the lines of configuration are required to be configured to your border gateways and core router. Again, this configuration includes VXLAN configuration for multisite under the NVE interface, underlay IFCs, overlay IFCs, and BGP.

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 - Revisit MSD Overview Dashboard

Revisit the MSD Overview dashboard to check on the status of the MultiSite deployment provisioned to the border gateways and core router. If the status does not populate right away, give NDFC a moment to update. You should see:

• 9 Routing Loopbacks for each of your leaf switches: Site1-S1, Site1-S2, Site1-L1, Site1-L2, Site1-BL1, Site1-BGW1, Site2-S1, Site2-L1, and Site2-BGW1
• 6 VTEP Loopbacks for each of your leaf switches that are VTEPs: Site1-L1, Site1-L2, Site1-BL1, Site1-BGW1, Site2-L1, and Site2-BGW1
• 6 NVE Interfaces, equivalent to your VTEPs: Site1-L1, Site1-L2, Site1-BL1, Site1-BGW1, Site2-L1, and Site2-BGW1
• 2 MultiSite Loopbacks for each of your border gateway leaf switches: Site1-BGW1 and Site2-BGW1
• 3 L2VNIs between your Site1 and Site2 fabrics: BlueNet1, BlueNet2, and RedNet1
• 2 L3VNIs between your Site1 and Site2 fabrics: BlueVRF and RedVRF
• 1 Extended VRF for your BlueVRF/L3VNI being extended externally from your Site1 fabric via your Site-BL1 switch to your ExtL3 external fabric

1. Click Overview

Continue to the next section to extend a L2VNI and L3VNI overlay between your Site1 and Site2 fabrics to establish connectivity between two servers in each fabric.