With your Greenfield fabric created and deployed, your focus is now toward your Brownfield fabric. This will be your Site2 fabric. A Brownfield fabric migration requires best practices to be followed on the existing fabric such as maintain consistency of the overlay configurations. Like the Greenfield fabric you created, you will create the same type of "Data Center VXLAN EVPN". When creating the Site2 fabric, you must ensure the configuration parameters align with the existing fabric. You will step through these in the steps below.

Step 1 - Exit Site1 Fabric

1. Navigate back to NDFC and in the top right corner, click the to close your Site1 fabric

Step 2 - Launch Create Fabric Wizard

In the LAN Fabrics pane, you should now see your Site1 fabric present. Navigate to the far right of the pane and locate Actions:

1. Click Actions
2. Then, click Create Fabric

Step 3 - Name Your Fabric

In the Create Fabrics popup wizard:

1. Name the fabric: Site2
2. Then, click Choose Fabric

Step 4 - Select Type of Fabric

Make the same selection as you did for your Site1 fabric, so in the Select Type of Fabric popup:

1. Select Data Center VXLAN EVPN
2. Then click Select

Step 5 - Define General Parameters

The parameters in this section require you to adhere to what is configured in the Brownfield fabric. For the purposes of this lab, the defaults in Fabric Settings and Brownfield fabric align with some subtle changes to annotate the distinction between Site1 and Site2.

The first section, General Parameters, you will leave the defaults much like you did in your Site1 fabric as OSPF is also the underlay routing protocol in the Brownfield fabric. You do need to make changes to the BGP ASN number and Underlay subnet mask to align with the Brownfield fabric:

1. Set the BGP ASN to 65222
2. Set the Underlay Subnet IP Mask to a 31

Step 6 - Define Replication Parameters

Your Site2 will also use multicast in the underlay for BUM. The Fabric Settings defaults can be used here as they were in your Site1. The Loopback identifier will be the only change to distinguish Site2 from Site1:

1. Click Replication
2. Change the RP Loopback interface to 252

Step 7 - Define Protocols Parameters

Your Brownfield fabric is already built adhering to the best practices of using Loopbacks and OSPF process as specified in the Fabric Settings, so the default will be left alone:

Step 8 - Define Resources Parameters

In Resources parameters you must define the IP address pools for the routing Loopbacks, VTEP Loopbacks, Spine RP Loopbacks, and the physcial interfaces to align with the addressing scheme already used in the Brownfield fabric:

1. Click the Resources tab
2. Underlay Routing Loopback IP Range: 10.22.0.0/22
3. Underlay VTEP Loopback IP Range: 10.222.0.0/22
4. Underlay RP Loopback IP Range: 10.252.252.0/24
5. Underlay Subnet IP Range: 10.2.0.0/16

Step 9 - Define Manageability Parameters

The last section to update in this lab is the Manageability parameters that defines the DNS, NTP and syslog servers and how to reach them. These configurations apply to all the switches in the fabric. Use the information below to set the IP range for each:

1. Click on Manageability
2. DNS Server IP(s): 10.0.226.251
3. DNS Server VRFs: management
4. NTP Server IP(s): 10.81.254.202
5. NTP Server VRFs: management
6. Click Save at the bottom right.

Step 10 - View Site2 Fabric Sidebar

In addition to the Fabric Health column, you can click on any fabric listed to get a quick view sidebar that pops out on the right side of your screen with details about the fabric:

1. Click Site2
2. A sidebar should pop out on the right with more high-level information. This will populate more as you progress throughout the lab.
3. To navigate to your Site2 fabric, click the expand button . You could also just double click the Fabric Name Site2 to navigate to the fabric

Step 11 - View Site2 Fabric Dashboard

You are presented with the overall fabric dashboard overview. At this point, like your Site1 fabric, the dashboard isn't very interesting, but in the next few sections, you will bring this dashboard to life upon importing your Brownfield fabric.

Continue to the next section to discover and import your Browfield fabric switches into your Site2 fabric.