In a Cisco ACI fabric, leaf and spine switches are crucial components that enable high-performance, scalable, and resilient data center networks. Over time, you might need to replace hardware due to failure, upgrades, or scaling needs. This document will walk you through the essential steps to safely replace a leaf or spine switch, including preparation, execution, and post-replacement validation.
1. Obtain the new switch and ensure it is running the required ACI version. If not, refer to the link below for instructions on converting from NX-OS to ACI:
Link: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/upgrade/guide/b_Cisco_Nexus_9000_Series_NX-OS_Software_Upgrade_and_Downgrade_Guide_Release_7x/Converting_from_Cisco_NX_OS_to_ACI_Boot_Mode.pdf
2. Remove the faulty switch from the ACI fabric:
a. Log in to ACI and navigate to Fabric > Inventory > Fabric Membership.
b. Right-click on the switch that needs replacement and select "Decommission." Wait for 10 minutes to allow the process to complete.
c. Afterward, right-click on the decommissioned switch and choose "Remove from Controller" in the popup window. Hit "Submit" and wait for 10 minutes for the removal to finalize.
[+] Register the new switch into the ACI fabric.
[+] Check for any faults in the fabric, inventory, or the specific pod and node where the new switch is installed. You can access the faults details by navigating to fabric/inventory/[podNumber]/[nodeName]/faults.
Use the link below for reference on how to check EPLD/FPGA or any other faults:
Link: https://www.cisco.com/c/en/us/support/docs/cloud-systems-management/application-policy-infrastructure-controller-apic/213617-aci-leaf-or-spine-replacement-procedure.html
By following these steps and guidelines, you can ensure a smooth ACI leaf replacement process and maintain the stability and efficiency of your ACI fabric.
