Ok, here's the gist of it:
We have a network that was happily chugging along, 160 thin client introduced in summer, working ok.
all of a sudden everything is screwed. No changes to any config anywhere. CMIS keeps booting people out, Thin Clients freeze and loose connection to TS. Checked error logs on TCs message saying "The Group Policy client-side extension Folder Redirection failed to execute. Please look for any errors reported earlier by that extension." but that seems to be logged before the thin clients log on.
My thoughts, and things i'm currently looking at are:
Dodgy nic on DNS server - could loose connection when Thin Clients are trying to connect? Nothing in DNS logs.
Failing Switch - seems most likely as it's quite old (Cisco Catalyst 3500) and it is the switch that most servers are plugged into either directly or indirectly.
We are actively monitoring the servers, and managed switches including the perhaps dodgy cisco with nagios. Other than the occasional warning bcs no data recieved from host everything seems to be fine. We no data recieved warnings disappear on next polling.
Does my hypothesis seem correct? It's very frustrating as all the equipment is telling me it's fine, but something is going wrong somewhere. We've managed to take the cisco out of commission so hopefully tomorrow will tell. If not suggestions of other things i may be over looking would be appreciated!