They run only CATOS. You have to upgrade to a k9 image to get SSH support. Choose Crypto graphic software for Cat 4000 (Note that 2980 run same image as cat 4000 sup 1 and 2). and that should take care of SSH support.
I do not see a problem with the feature itself , but there is a high priority bug in 7.6(5) code ,CSCed48590 ( Cat4000 carshes in function "panic" ) , so you should use a release later then 7.6(5). Use 7.6(14) instead.
2980G cannot be upgarded to IOS . This supervisor only runs CatOS.
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...