Step1 – Download the NX-OS image need to be installed on the Nexus Switch

Step2 – Add the NX-OS image in the USB drive

Step3 – Connect the USB drive to the ACI leaf switch & login to ACI leaf on CLI

Step4 – Copy the file in switch bootflash with below command

copy usb/usb1/<NX-OS file.bin> bootflash:

Step5 – Reload the leaf and type break sequence (Ctrl – C) while leaf is rebooting so leaf will go to boot loader

Step6 – Verify that you can detect the USB and the NX-OS file in the USB

loader > dir usb/usb1

Step7 – Boot the switch with NX-OS image

loader > boot nxos.xxx.xxx.xx.bin

Step8 – Switch will boot with new NXOS image now.

Step9 – Do not forget to add & save boot variable in NXOS switch config once the switch boots in NXOS mode as below

boot nxos bootflash:<NXOS Image.bin>

I hope this article helped you in the implementation. Please provide feedback if you like me to write more related articles!!

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How to Convert a ACI Nexus9000 Leaf to NX-OS Mode
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Ross Sliwa
Ross Sliwa
4 years ago

router switch

Pepek Namornik
Pepek Namornik
4 years ago

There is no “copy” in Loader Prompt. As per whitepaper from Cisco (Using Boot Loader Commands), when using USB, you have to first boot from USB (also not “usb/usb1” but “boot usb1:nxos”(the “:” symbol is important), and then, after switch boots from USB, copy new NXOS from USB to bootflash.

Cumar Chan
Cumar Chan
1 year ago

Above steps 1-6 are to be done while booted in ACI mode.
Then reload and enter Loader>
From Loader Issue the boot bootflash:nxos-… command

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