On a network of around 35 PCs and ~10 Printers etc we are having a very annoying issue whereby we keep losing internet connectivity. At first i thought it was a bandwidth problem as we are all on the same ADSL connection but the traffic graph suggests there should be plenty of spare bandwidth. When this loss of connectivity happens the router homepage is also inaccessible so i believe there is a problem with our LAN. I need some help/advice on how to pinpoint this issue as there is a lot of cable/NICs and a couple of switches etc. How can i pinpoint this problem?
The router has been recently changed and is a Draytek Vigor 2830 (the problem was around before the router change) so i believe the router itself is not the issue.
The problem is very intermittent and can happen 10 times a day or 20 times a day, or sometimes more. Just not sure where to start with this troubleshooting..... Its a place of work so i can't really start disconnecting people and testing to see if the problem goes.
Thanks in advance.