I have a 48 port, Cisco 3550 XL with the following IOS:-
IOS (tm) C3500XL Software (C3500XL-C3H2S-M), Version 12.0(5)XU, RELEASE SOFTWARE (fc1)
The switch works fine, but what seems to happen when I'm logged into it is that it logs me out every 30 seconds or so. It does this in telnet mode, or even with the console. My exec-timeouts are 20 minutes, so I know it's nothing to do with this. I tried upgrading the IOS but as the switched logged me out, it stopped the upgrade.
Has anyone had any experience of this?