Always change the boot variable after the image is fully copied and verified. Never delete the current image before testing the new one. Keep at least two images in flash for fallback.
Again, there is for the 3650. If a website offers a file named c3650-ipservicesk9-mz.150-1.SE.bin , it is fake or for a different platform. download cisco 3650 ios
Without an active support contract tied to your CCO ID, Cisco’s download portal will either hide the software or return an “Unauthorized” error. Always change the boot variable after the image
A quick Google search for yields thousands of third-party websites, forum links, and shady file-sharing portals. But here is the hard truth: You cannot legally download Cisco IOS software from a public website without a valid service contract. Again, there is for the 3650
Once you've downloaded the IOS image, follow these steps to upgrade your Cisco 3650 switch: