Ok, I work as a LAN tech for Xerox and we ran into a wonderful little problem last week. Some sales goof at one of our corporate offices decided to install XP (how he added it to the domain we still don't know) after an ALl Exchange email went out stating that NOBODY is to even think about XP let alone install it. Anyway, there are 3 Cisco 5500 series switches at that location and all of them bit the dust thanks to XP. Not sure what exactly happened other than it created a broadcast like we have never seen!! Don't get me wrong, I absolutely love XP and I have it running on all my machines at home but beware if you have a 5500 on your LAN! Anyone heard about this? More details as I get them...