Article ID: 14593
Enterasys (formerly HiPath) Wireless Controller (EWC)
C20, C25, C4110, C5110, V2110; firmware 8.01.01.0251
Upgraded firmware from 7.31.02.0010, directly to 8.01.01.0251 or higher.
Windows XP-SP3 clients cannot connect to the Wireless VNS using PSK authentication.
Other systems, including Windows 7, Linus, and Apple Mac devices, are able to connect.
An apparent result of the one-step upgrade without staging through 7.31.06.0007 as recommended in release notes (15070
Avoid this issue by using the recommended staged upgrade process.
Resolve this issue by changing the PSK password to another value and saving the configuration, then changing it back to the original value and saving the configuration.