We have 50 Windows 7 Pro 32-bit desktops at one of our sites, connected to a Windows 2012 AD. They have all started losing network connectivity (connectivity to our main site over a metro-e network, randomly. The user can reboot several times and then it will reconnect for a undetermined amount of time and drop again.
The desktops, once they have lost connectivity, can ping to their gateway and other systems at that location. They can't ping the main site, which means they have no internet.
This location has seven Procurve layer 3 switches, one IDF that the Metro-E is connected to and feeds the MDF. The MDF feeds the other five switches. All switches have desktops connected to them, Cat6, and all have the same issue.
Any help will be greatly appreciated. I know this is a lot and could be a variety of issues but we have tried several things to no avail.