How to install new ISO update in cisco switches without TFTP server

[yaredo70]

Hi All,

 have 3 different models of cisco switches I need to upgrade the IOS but I can't use the TFTP server. please share if you have other ways to do this. 

Thanks,

Yared

[balaji.bandi]

Other Option only left is USB (depends model you looking to upgrade IOS here).

Only TFTP have limitation, how about FTP or other mode ?

[yaredo70]

With USB, can I just copy the files into the external hard disk and plug it into the switch, and install the os from the hard disk? Can I use Cisco Network Assistant(CNA) to transfer the flies? 

thansk.

[balaji.bandi]

When i mentioned USB, USB thumb drive with FAT format, not HDD.

IF you able to connect using network (example CNA) then why not use TFTP ?

[Leo Laohoo]

What are the three different switch models?