I encountered the following: after successful 802.1x authentication, the "passed authentication" log on ACS is filling with "authen OK" logs from the same user - every 2 minutes one new entry. The reauthentication on the switch is for sure turned off. Every two minutes on user's WinXP station there is baloon info that network is now connected, and there is a break in pings (about 2-4 seconds). What is causing this, and how can it be removed? Switch 6500, Catos 8.5.8, ACS 4.1.3, WinXp are using machine authentication.