Hi,
The 2980G switch are pure L2 switches and have a Cat4000 Sup2 architecture hence they only support CatOS and cannot support IOS.
But in case of 2980G-L3, you have ONLY IOS running on them as they are L3 switches and can support L3 routing as well. So in summary there is no conversion possible from CatOS to IOS or the other way round on Cat4000 architecture switches.
Hope this helps..
Regards,
Param
