As previously mentioned, once you have added your existing fabrics as children to the parent MSD fabric, you make network changes from the MSD fabric. In this section, you are going to extend your BlueVRF tenant overlay (L3VNI) across sites to your Site2. Remember, your Site2 upon the Brownfield import was only seen to have had the RedVRF tenant overlay. You will also extend a Network segment (L2VNI) to Site2 from Site1. You will see how easy this is without have to go between multiple fabrics or even do this on the CLI. It's all under the same view.

Step 1 - Multi-Attach

In your MSD fabric, navigate to Networks to attach your BlueNet1 Network to Site2-L1.

1. Click Networks in the top navigation bar
2. Click the checkbox for BlueNet1
3. Click Actions
4. Click Multi-Attach

Step 2 - Multi-Attach of Networks: Switches

1. Locate and click the checkbox for Site1-BGW1
2. Locate and click the checkbox for Site2-BGW1
3. Locate and click the checkbox for Site2-L1
4. Click Next

Step 3 - Multi-Attach of Networks: Interfaces

1. Locate and click the checkbox for BlueNet1 Site2-L1
2. Locate and click the checkbox for BlueNet1 Site2-BGW1
3. Locate and click the checkbox for BlueNet1 Site1-BGW1
4. Add to the interfaces list of Site2-L1: Eth1/5
5. Click Next

Step 4 - Multi-Attach of Networks: Full Switch Deploy

1. Click Save

Step 5 - Deploy Configuration

Review the configuration to be deployed, then:

1. Click Deploy All in the bottom right


The stage moves to Deploy Progress where the Network Status will show Deployment In-Progress to Deplolyment completed status:

2. Click Close

Step 6 - Review BlueNet1 Network Attachments

Review and confirm your BlueNet1 network is attached to all your leaf swithces except for your Site1-BL. This attachment and deployment has extended this VXLAN EVPN L2VNI segements across your Site1 and Site2 fabrics.

1. Click Networks at top menu
2. Click BlueNet1
3. Right Overview Panel will open
4. Click Square to launch Network Attachments

5. Click Network Attachments at top menu
6. Review and confirm your BlueNet1 network is attached
7. Click X Once you finished reviewing network attachments

Step 7 - Navigate to VRFs and VRF Attachments

Navigate to VRFs where you can now check your VRF Attachments to confirm that your L3VNI, BlueVRF, originally created in your Site1 fabric, has also been extended.

1. Click VRFs at top menu
2. Click BlueVRF
3. Right Overview Panel will open
4. Click Square to launch Network Attachments

5. Click VRF Attachments at top menu
6. Review and confirm your BlueVRF is deployed
7. Click X Once you finished reviewing network attachments

Step 8 - Revisit MSD Overview Dashboard

The MSD fabric Overview dashboard has not changed all that much, but it has updated the Extended Networks/VRFs area of the dashboard, which is infact the most import change. There are now two (2) extended networks and three(3) extended VRFs. You will need to wait 300 seconds for the NVE interface's delay-restore timer for the loopback to come up and display in the dashboard.

1. Click Overview

Continue to the next section to verify your MultiSite environment.