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This chapter describes how to configure the Top-of-Rack (ToR) switches and deploy networks in NDFC.
NDFC supports the Top-of-Rack (ToR) switches. You can add the Layer 2 ToR switches in an external fabric, and they can be connected to the Leaf switches in the Data Center VXLAN EVPN. Typically, the Leaf and ToR devices are connected with back-to-back vPC connection. For more information, see Supported Topologies for ToR Switches.
The following topologies with ToR switches are supported in NDFC:
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Cisco Nexus 7000 Series Switches do not support the ToR switch role in Cisco NDFC. |
ToR switches with back to back vPC connection to the leaf switches.
ToR switches with port channels connected to both the leaf switches. The L1 and L2 switches are connected as a vPC pair.
ToR switches with port channels directly connected to the leaf switches. The L1 and L2 switches are connected as a vPC pair.
ToR switches with port channels directly connected to the leaf switches. vPC pairs are not configured for the leaf or ToR switches.
ToR switches directly connected to the leaf switches. vPC pairs are not configured for the leaf or ToR switches.
The following topology with ToR switches is not supported in NDFC:
Before you begin, make sure you have an Data Center VXLAN EVPN fabric or create and deploy a new fabric. For more information, see Creating a VXLAN EVPN Fabric Using the Data Center VXLAN EVPN Template.
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NDFC supports the trunk_host policies for the ToR switches. Make sure ToR has vPC, port channel or trunk host policy attached on the interfaces connected to Leaf. These policies are used to connect the ToR switches in the external fabric to the Leaf switches in the Data Center VXLAN EVPN fabric. |
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Step 1 |
Create an external fabric and add two ToR switches. For more information, see Creating an External Fabric. The number of ToR switches can be more than two. This procedure shows how to configure ToR switches as shown in the ToR Topology-1, where ToR switches are connected using vPC. The following are the different scenarios for connecting the ToR switches:
After adding the ToR switches, make sure that the role for the ToR switches is chosen as ToR. |
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Step 2 |
Select one of the ToR switch and click on . Choose the second ToR switch as a vPC Peer. |
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Step 3 |
Under vPC Pair Template, enter all the relevant details for a vPC connection between both the ToR switches. For more information about fields and their descriptions, see Creating a vPC Setup.
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Step 4 |
On Switch Overview window, click . |
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Step 5 |
After the configuration is completed in the Config Deployment window, click Close. |
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Step 6 |
Create the VXLAN EVPN Multi-Site fabric. While creating the VXLAN EVPN Multi-Site fabric, under the General tab, choose the ToR Auto-deploy Flag check box. This action enables automatic deployment of the networks and VRFs in the Easy Fabric to the ToR switches in the External Fabric when you click Recalculate and Deploy in the VXLAN EVPN Multi-Site fabric. For more information, see Deploying Networks on ToR Switches. For information about the remaining tabs and fields, see Creating a VXLAN EVPN Multi-Site Fabric. |
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Step 7 |
Open the VXLAN EVPN Multi-Site fabric. Navigate to Child Fabrics and click on Actions to move fabric into VXLAN EVPN Multi-Site. Select the Data Center VXLAN EVPN fabric where ToRs are connected and click Add. Similarly, move the external fabric that contains the ToR switches to the VXLAN EVPN Multi-Site fabric. |
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Step 8 |
Open the Data Center VXLAN EVPN fabric containing the leaf switches. |
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Step 9 |
You need to create back-to-back vPC between the leaf and ToR switches. |
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Step 10 |
Navigate to . Choose vPC and enter all the relevant details and click Save. For more information about the fields in this window, see Adding Interfaces. After saving all the information, click Deploy. Similarly, follow the Steps 9 and 10 to create a vPC on the ToR switch as well. |
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Step 1 |
Choose , double-click on the Data Center VXLAN EVPN fabric. |
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Step 2 |
In the Networks window, select the networks that you want to deploy or create a new network. For information about creating a network, see Creating Network for Standalone Fabrics. |
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Step 3 |
Select the Network from the Network Attachment window. Click on Actions and Edit. Attach the network and select the appropriate interface/port-channels and then click on Save. These port channels connect the leaf switches to the ToR switches. The networks will be deployed on these port channels. |
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Step 4 |
On Fabric Overview window, click . Now the VLANs are deployed on the leaf switches. |
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Step 5 |
Navigate to VXLAN EVPN Multi-Site fabric. |
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Step 6 |
On Fabric Overview window, click . The networks created and deployed on the leaf switches in the Data Center VXLAN EVPN fabric are also deployed on the ToR switches in the external fabric. This step allows the same VLANs to be configured on the ToR switches that are deployed on the leaf switches in the Step 4.
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