Before you go any further, make sure the IOS file MD5 hash is exactly the same as the MD5 hash found in the Cisco website. If they don't match, then your IOS file is corrupt.
Ok, try this, slightly simpler:
1. What is the Management IP address of your switch?
2. What is the IP address of the PC directly connected to your switch? Note this down.
3. Can this PC, which also has the IOS file (hopefully a TAR), ping the switch? If yes, proceed to #4.
4. Do you have a TFTP server running on the PC which is has the IOS file? If no, use TFTPd32/TFTPd64. It's easy to use. Just make sure you point the TFTP to the location/folder where the IOS is located. Alternatively, you can put the IOS file into the default folder of the TFTP.
5. Make sure your switch has ample room to store the new IOS.
6. The command to un-pack the IOS into your switch is: archive download-sw tftp:///IOS.tar
NOTE: You can use the option "/overwrite", between the "download-sw" and "tftp", and this will erase your old IOS.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...