I have an old Cisco 2900XL switch lying around (no idea what is on it) and wanted to use it as a desktop switch. Two questions:
1) If I factory defaulted the switch would this work?
2) Does this switch support auto-mdix?
1) No idea. Depends if the switch is working anyway. Fctory defaulting won't break anything that isn't already broken so it won't do any harm.
2) No it doesn't.