On July 13th 2010, Windows 2000 Server/Professional and Windows XP Service Pack 2 will no longer be supported with security updates by Microsoft.
Machines running these operating systems should be upgraded to newer versions like Windows 7 or Server 2008 if they are directly connected to the D-PHYS network.
The IT Use Policy of ETH does not allow systems without an active patch cycle to be connected to the ETH network.
Please make sure that all computers running any of the affected operating systems have been migrated by July 13th 2010. The same also applies to even older systems like Win 9x or NT 4.0 of course.
More information about Microsoft Support Lifecycle can be found here.