Home network stopped working

Ecs / Rc415t-m2
April 25, 2009 at 00:54:57
Specs: Microsoft Windows Vista Home Premium, 1.795 GHz / 1982 MB
Hi. I have an old PIII machine running XP pro.
When I bought a new machine with Vista, 2
years ago, I set up a wired network through a
variable speed switch to a standalone DHCP
modem i.e. both machines connect by cable
to the switchbox which is a connected by a
single cable (The modem has to be standalone
as I live in a remote area of Spain with only a
microwave link). Both Internet connections
still work, but 2 weeks ago, the home network
stopped working and I have not been able to
find out why. I have reinstalled all the network
card drivers, resbooted modem, switchbox and
combuters until I am blue in the face, run all
the MS network diagnostics tools, which just
tell me there is no problem, deleted and
reinstalled the connections, cleaned out the
registry, run chkdsk with the /f option (in case
of hard drive corruption), all to no avail. The
connection should be a VPN, as although the
2 machines share a modem, they are
assigned unique IP addresses, however this
has worked flawlessly for the last 2 years. I
am certain the problem lies with Windows.
Any suggestions most welcome.

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April 25, 2009 at 05:50:02
It sounds like the switch itself may be failing.

I have one at work that recently screwed up and ports 37 to 46 can't communicate with any even number ports from 2 to 36 but can communicate with the odd numbered ports in the same range. Ports 37 to 46 can communicate with each other just fine. Go figure! lol

So, you may have a couple of ports that have, for whatever reason, stopped communicating with each other.

Assuming your switch has 4, or more, ports, I would open a command prompt window on both of your computers and would ping each other (ie: PC 1 pings PC 2 and vice versa) and then see what happens. If you get no replies, then you're having a similar issue (ie: no communication between the two ports) and you can try (one at a time) moving the plugs from one port to another. If you find two ports that communicate, leave your PC's plugged into them. But, if this is the case, I would seriously consider buying a replacement. In fact, if it were me, I'd buy a SOHO router with 4 LAN ports.

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April 25, 2009 at 07:27:05
Many thanks for your reply. I thought of that, but it doesn't
seem to be the problem. I have three of the 8 ports on the
switch in use, 2 to computers and 1 to the modem, and no
matter what configuration I put them in over the 8 ports, I get
Internet access with no problem but they can't find each
other, so it seems good old Microsoft is the culprit again.
Configurations tried: 1+2 computers (C), 3 to modem (M)
2+3C, 1M, 1+3C, 2M, 1+4C, 2M and 3M etc, etc, and every
configuration worked for Internet connection but not LAN.

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