Earlier in the lab, when you created your Site1 fabric, you set Site1's Fabric Settings under Resources to provision VRF Lite externally and also auto deploy both the sub-interface and BGP configuration for external connection. Your border leaf and external router, as you saw when you created your ExtL3 fabric, have detected each other, so the now the provisioning of the sub-interface (with IP address) and BGP configuration can occur to both.

Step 1 - Exit ExtL3 Fabric

1. In the top right corner, click the to close your ExtL3 fabric

Step 2 - Navigate Back to Site1 Fabric

Navigate back to your Site1 fabric:

1. In the Fabrics pane, double click on Site1

Step 3 - Recalculate and Deploy Site1

1. In the top fabric-level Actions dropdown, click Recalculate and Deploy to syncronize Site1 within NDFC with the new ExtL3 fabric. This syncronization will aide in performing some automatic configuration and deployment from the Site1 VXLAN EVPN fabric to the ExtL3 facric external router by staging the IP addresses for use on the sub-interfaces between your border leaf and external router.




2. Click Deploy All. Notice the Border is Out-of-Sync, feel free to explore the pending configuration. This is purely to sync Site1 with the existence of the ExtL3 fabric.

Step 4 - Close Deploy Wizard

1. Click Close

Step 5 - Navigate to & Edit VRF Attachments

Because we now want to extend your tenant overlay externally out of your Site1 fabric, you need to return to VRFs and deploy your BlueVRF to your Site1-BL1. Previously, you only deployed this VRF to your Site1-L1 and Site1-L2 through the attachment of two Networks.

1. Click the VRFs tab
2. Check BlueVRF Box
3. Click the Action
4. Click Multi-Attach



5. Check Site1-BL1 Box
6. Click Next



7. Click Save



8. Click Deploy All



9. Click Close



10. Double Click BlueVRF

Step 6 - Select Site1-BL to Attach BlueVRF

You need to select your Site1-BL1 to attach the BlueVRF:

1. Click VRF Attachments
2. Check BlueVRF Box - For the Switch Site1-BL1
3. Click the Action
4. Click Edit

Step 7 - Enable BlueVRF Attachment to Site1-BL

In the Edit VRF Attachment wizard:

1. Check the Attach is enabled for the VRF
2. In the Extend dropdown menu, select VRF_LITE
3. In the Extension table at the bottom, under the Action column, click Edit
Take note that in this table, you can see the interfaces connecting your border leaf and external router are automatically detected with both being Ethernet1/3, IP addresses are allocated from the VRF Lite sub-interface address pool defined in the Fabric Settings of your Site1 fabric, and the BGP ASN is populated that you defined in your ExtL3 fabric.

Step 8 - Enable External L3 Extension

In the Extension Details popup, you can leave everything default as NDFC is pulling the parameter values from the VRF Lite sub-interface and IP address pools in your Site1 fabric. The two key actions you need to take are to enable the extension and then to define the VRF to extend:

1. Click the Detach/Attach toggle to enable the external L3 extension
2. Then scroll down

3. In the PEER_VRF_NAME, input BlueVRF
4. Click Save

Step 9 - Exit Site1-BL VRF Attachment

Saving the extension will redirect you back to the Edit VRF Attachment wizard. The Extension table should display the extension as green and Attached in the Attached column. If it does not, then please contact a lab instructor, otherwise, please proceed:

1. Click Save

Step 10 - Confirm Pending VRF Attachment to Site1-BL

Saving the Edit VRF Attachment wizard will redirect your screen back to the VRF Attachments. Confirm your Site1-BL1 shows as PENDING:

Step 11 - Launch Deploy Configuration to Attach VRF

Now, launch the Deploy Configuration wizard to deploy your BlueVRF to your border leaf:

1. Click the checkbox on the row for your PENDING Site1-BL1
2. Click Actions
3. Click Deploy

Step 12 - View Pending Configuration for VRF Attachment

Kickoff the deployment of your BlueVRF to your border leaf by:

1. clicking Deploy in the bottom right


The stage moves to Deploy Progress where the Network Status will show Deployment In-Progress status along with the progress bar:

Step 13 - Exit Deploy Configuration for VRF Attachments

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

2. Click on X at top right

Step 14 - Review Overview Dashboard

Revisit the main Overview dashboard to see that the Extended Networks/VRFs has been updated:

1. Click Overview
2. Locate the Extended Networks/VRFs that should now show one VRF extended (externally in this case)

Continue to the next section to deploy the already pending configuration in your ExtL3 fabric.