Uploading the ACI image

We have a number of ways of performing the upgrade. We can use SCP to copy the image from the APIC to the switch, upgrade from another SCP server, or copy it directly from a USB port. We will look at all three methods, and are assuming that the Nexus switch has already been introduced into the network and has connectivity.

A word of warning when using USB drives, though: smaller is better. Taking a 1 TB drive loaded with all your favorite Nexus images and expecting it to work will only leave you hunting around for a 2 GB drive that has sat in a drawer gathering dust for a few years. This is due to the level of file system support. Older IOS versions only supported FAT16, which has a file size limit of 2 GB, while newer ones support FAT32 (such as IOS 15.1). Sometimes, it is easier to play it safe and go with FAT16.