We have the Catalyst 2950 device (C2950-I6Q4L2-M) Version 12.1 and our Windows XP clients can join our Active Directory domain but our Windows Vista clients cannot connect/ping/remote the domain controller and thus can not join the domain. Any ideas? Do we need a firmware upgrade? Unfortunately we are not Cisco savy so any feedback or help would be greatly appreciated.
Todd N. Rustad