I am attempting to downgrade my IOS in a 3750 replacement switch.
I am going from 12.2(35) SE5 to our present build which is 12.2(25)SEE3.
My tar file in tftp is a known good file and I have used successfully in the last month or so on older 3750's.
Once the overwrite begins, everything appears to run fine. At the end, I get an error message of:
The image in the archive which would be used to upgrade system number 1 does not support the same feature set.
A ?show flash? shows that the 12.2(35)SE5 build is still there, even after a ?reload?.
Any thoughts on how to get around this?