Quantity does not equal quality. Like I said, it could be a DHCP issue. By that I mean the reissue and reauthorization of IPs. It's a common problem. In the negotiation phase some clients get locked up. This doesn't just happen the first time the computer/device is turned on - it can happen on lease renew for example, or when, for some other reason the DHCP server re-issues (a small power failure too) That doesn't mean that every machine fails on the network or that the DHCP server has failed to issue the addresses correctly. It's usually a failure of the negotiation phase for lease of IP or issue of new IP. This can often result in a the DHCP server thinking it has given a successful address, the host showing as connected, yet connectivity lost. If you two don't understand that then I don't understand why you can argue about it. If the OP tries a few of my suggestions he *will* narrow the problem down somewhat.
If the poster wants any more help on that just pm me - I'm not reading this thread any further. Like I said Gunrunner - PLEASE stop following me round threads just to contradict me. It doesn't help anyone's experience of the forum.