Just starting a new Cisco core. Using CNA,it sees one 3750 just fine. When I stack that with an identical 3750 (the stacking seems to be successful when I telnet into the master switch), it shows up as an unsupported device in CNA. Anybody help me figure out what's going on? Thanks in advance.
I have seen this issue with switches running 122-25.SEB2 it shows as "unsupported devices" and the fix is to downgrade to 12.1.25SEB4.
According to cisco whitepaper before that if you add or replace a new 3750 switch to be a memeber of the stack, the master will automatically download it's image to the new member if they don't have the same IOS. In our case, we have to make sure that the new or replacement one has the same image as the master.