Creating Layer 3 Extension with NDFC

Hello. My name is Tomas Klensnick. I'm a Cisco data center network subject matter expert with the Cisco technical education team. In this video, you will create a layer three extension with Cisco Nexus dashboard fabric controller. You will begin with verifying the configuration on the edge router. Then you will deploy inter fabric connection link on the border leaf physical interface that connects to edge router. You will finish with deploying the VRF extensions on the border leaf. Let's look at an example where you have implemented a VXLAN EVPN fabric called fabric with two spine and two leaf switches in your environment. You have deployed another external fabric named external with one edge router named external in that fabric. There is a loopback ten interface configured on the external switch to verify the connectivity. Your first task is to set correct roles that is border and edge router for the devices interconnecting the two fabrics. Then you will configure an inter fabric connection between the two fabrics. You will deploy VRF extension on leaf two. And in the end, you will verify the connectivity between fabrics by pinging a loopback ten IP address on external switch from web one device that is connected to leaf one in fabric. First, verify the interface configuration on the external layer three device. Open a PuTTY session to external device. Check the running configuration of an interface connecting external device to leaf two. Type show running configuration interface Ethernet one slash one to observe that an interface is in routed mode and MTU is set to ninety two sixteen. Next, check the sub interface that will be used for VRF extension. Type show running configuration interface ethernet one slash one dot two. Two c m t u is set to ninety two sixteen. Dot one q tag is set to two. Interface is a member of v r f v r f five thousand and IP address is set to one seventy two dot sixteen dot one dot two slash thirty in this example. The last interface to check is loopback ten. Type show running configuration interface loopback ten to observe the IP address is set to one hundred dot one hundred dot one hundred dot one hundred slash thirty two. And the disk loopback interface is a member of v r f v r f five thousand that is going to be used in v r f extension. Now close putty session and open Cisco Nexus dashboard fabric controller. Expand LAN and click fabrics. Observe there are a fabric named fabric with VXLAN fabric technology and sixty five zero zero one autonomous system number and a fabric named external with external fabric type and sixty five zero two zero autonomous system number. Select fabric, click actions, and choose edit fabric. Select resources tab. Scroll down and choose manual VRF lite deployment to manually configure the inter fabric connection link. All BGP and VRF related configuration has been prepared on external device in advance. Click save. Click topology and observe fabrics. Fabric and external are connected. Double click fabric named fabric. Observe the topology of two spine and two leaf switches. Right click leaf two and select set role. Since leaf two is connecting to external network, choose role border and click select. In actions, choose recalculate and deploy. After a few seconds, you can see leaf two is out of sync and has several lines in pending configuration. Click deploy all. Wait for a couple of seconds for status to go from started to success on leaf two. Click close. Click on data center and double click external fabric. Right click external switch and select set roll. Since external switch is connecting to VXLAN fabric, choose roll edge router and click select. Expand LAN and click fabrics. Double click external and click switches tab. Observe the roll of external switch is set to edge router. Close fabric overview window and double click fabric. Fabric and click switches tab. Observe the role of leaf two is set to border. To create an inter fabric connection link, click on links tab. Scroll down to see that a link between external and fabric has been automatically detected. Select the link and under actions, choose edit. Select v r f light as link subtype. Observe that source and destination fabric, device, and interface have been automatically detected. Select the link template. Choose external fabric setup and click select. Scroll down. In general parameters, observe the source BGP autonomous system number is sixty five zero two zero. Add source IP address and netmask. In this example, one seventy two dot sixteen dot one dot two slash thirty. Also, add a destination IP one seventy two dot sixteen dot one dot one in this example. Observe the destination autonomous system number sixty five zero zero one. Click save. Click switches tab and then click actions. Choose recalculate and deploy. Notice the config status of all the switches is in sync. Click close. Now deploy VRF extension configuration on the interfaces. Select VRF tab. Double click my VRF fifty thousand in this example. Choose VRF attachment step. Choose the line for VRF deployed on leaf two. Click actions and choose edit. Move the slider to attach. In the extend window, choose v r f light. Scroll down and observe that currently this v r f is detached on the interface Ethernet one slash four connecting to external fabric. Click edit under extension action. Move slider to attach. Scroll down to observe source and destination switch and interface dot one q ID local enable IP addresses and enable autonomous system number. In the peer VRF name, type VRF five thousand for this example. This is the name of a VRF configured on the external switch in advance. Click save. Observe that status of the VRF extension changed to attached. Click save. Close the VRF overview window. Click switches tab and then click actions. Choose recalculate and deploy. After a few seconds, you can see leaf two is out of sync and it has a number of lines in pending configuration. Click on pending lines to observe the configuration that is going to be pushed to the switch. Click close and then deploy all. Wait for a couple of seconds for status to go from started to success. Click close. To verify connectivity, open a PuTTY session to web one. Try to ping a loopback ten IP address on external switch. Type ping one hundred dot one hundred dot one hundred. Ping is successful. This concludes the Cisco technical education video on creating a layer three extension with Cisco Nexus dashboard fabric controller. Thank you for watching.