RJB08

The gateway on the vlan and the server are correct, when end computers drop their connection it changes from being connected to our domain name to just 'network' if you do an IP config it still has a proper IP address and everything looks normal there.......though you cannot ping anything!!!

Hello I work at a school and we have a number of Extreme switches across the site. At random times computers will drop their network connection, a yellow Explanation Mark will appear on the Network icon in the bottom right of the task bar saying 'no internet access' and people's network drives will come up with a red cross as they have lost connection and the drives are no longer accessible. Everything will then come back to life and people can work as normal with all connections restored.......then it can go again, then come back etc etc. The interesting thing is that this only affects computers that are on a specific vlan (our Admin vlan) all other computers are fine!! I have asked the company who set up all our Vlans to check this over and they have said everything is fine! This started off happening every 3-4 weeks, we would lose connection for 1-2 hours then it would be fine. Today though it kept dropping then coming back, then dropping again 4 or 5 times within half an hour! It is stable now but could come back at any time. If anyone has any idea's or could help it would be much appreciated as I feel like a sitting duck here waiting for it to go wrong again. Many thanks

Hello I am a network manager at a school and have an issue where Windows 7 computers will hang at the 'welcome' screen for anything up to 45 minutes to an hour after you have entered your credentials. Rebooting the computer will do nothing, if you log back in the same thing happens. At other times in the day the computer will log in fine. This can happen to 6 or 7 computers in a network room of 30 and to teacher computers in a classroom. All the students/staff use local profiles, the same GPO's and the same software is installed on all. There is no logic to how they can be fine one lesson and then not the next.......it is not the same computers all the time either. This happens across the school in different area's using different switches. Interestingly though I have put 30 new computers into a classroom that frequently had the 'Welcome' screen issue and they have been 100% fine since....not one issue at all. These computers have had the same image put on as the previous one's and i can't find a difference except for the fact they are a different make/model and are newer! If anyone has any idea's i would be very grateful! This issue is not going away and making it very hard......the sheer randomness is making it extremely hard to fault find and every logical route i go down always leads to the fact that it makes no sense at all!!! Thanks very much.