Network fails every few hours...

[Guest]

I've tried just about everything and can't seem to find the problem. I have a
cable modem connected to a router and the router is connected by wire to
three other computers.

Normally, if I reset the router and modem by unplugging them and the
replugging them the network works fine. However, after an hour or so of
surfing the web or playing an online game the network just "stops". I'll try
to connect to the internet and nothing will happen, as if the cable modem or
router just stopped working. Then, I reset the router and modem again,
restart the three computers and the network will be up and running again for
about another hour. This problem has persisted despite the fact I have bought
a new router and cable modem. Any suggestions

 

[Chuck]

I've tried just about everything and can't seem to find the problem. I have a
cable modem connected to a router and the router is connected by wire to
three other computers.

Normally, if I reset the router and modem by unplugging them and the
replugging them the network works fine. However, after an hour or so of
surfing the web or playing an online game the network just "stops". I'll try
to connect to the internet and nothing will happen, as if the cable modem or
router just stopped working. Then, I reset the router and modem again,
restart the three computers and the network will be up and running again for
about another hour. This problem has persisted despite the fact I have bought
a new router and cable modem. Any suggestions

Have you talked to your ISP tech support about this? My guess is something
their equipment is doing requires you to reset your equipment. My guess would
be DHCP or DNS. Make sure that you have the right DNS servers specified.

Try and see where it's failing. Get PingPlotter (free trial) from
<http://www.pingplotter.com/>, which is a GUI combination of ping and
traceroute. Set PP running, and ping your ISPs DNS server periodically. When
your problem pops up, see where your service is stopping.

 

[Robert L [MS-MVP]]

it could be the spyware. check these case study.
trojan & spyware block internet
Case Study - Trojan and spyware block accessing the Internet. Situation: Small
Company has a Linksys router connecting to the Internet. ...
www.howtonetworking.com/casestudy/spywareblockinternet1.htm

case study
Trojan and spyware block accessing the Internet. Others. Can't Print from NT 4
to XP Home Can't Print from XP Home to NT 4 ...
www.howtonetworking.com/casestudy.htm

Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
Don't send e-mail or reply to me except you need consulting services. Posting on MS newsgroup will benefit all readers and you may get more help.

I've tried just about everything and can't seem to find the problem. I have a
cable modem connected to a router and the router is connected by wire to
three other computers.

Normally, if I reset the router and modem by unplugging them and the
replugging them the network works fine. However, after an hour or so of
surfing the web or playing an online game the network just "stops". I'll try
to connect to the internet and nothing will happen, as if the cable modem or
router just stopped working. Then, I reset the router and modem again,
restart the three computers and the network will be up and running again for
about another hour. This problem has persisted despite the fact I have bought
a new router and cable modem. Any suggestions

 

[Kerry Brown]

I've tried just about everything and can't seem to find the problem. I
have a
cable modem connected to a router and the router is connected by wire to
three other computers.

Normally, if I reset the router and modem by unplugging them and the
replugging them the network works fine. However, after an hour or so of
surfing the web or playing an online game the network just "stops". I'll
try
to connect to the internet and nothing will happen, as if the cable modem
or
router just stopped working. Then, I reset the router and modem again,
restart the three computers and the network will be up and running again
for
about another hour. This problem has persisted despite the fact I have
bought
a new router and cable modem. Any suggestions

I have seen a Netgear router fail in this exact manner. After a lot of
arguing Netgear replaced it. The replacement works fine.

Kerry

 

[Peter R. Fletcher]

I have seen problems almost exactly like this resulting from a bad
connector in the cable company's local wiring - in my case it was at
the splitter which separates the cable modem feed from the cable TV
feed. The bad connector was introducing a ~ 10 dB loss, which was
almost at the limits of tolerance of the cable modem. Every so often,
minor glitches on the system occur, and these are enough transiently
to kill an already marginal connection. I finally got a tech who knew
what he was doing and traced the signal strength systematically from
the outside termination box - this immediately highlighted the point
where the loss was occurring. If you Google for and download DocsDiag,
you can get signal strength and other useful information from your
cable modem. My experience suggests that a "Downstream Received Signal
Power" of 2-5 dBmV is good - 13-15 dBmV, which is what I was showing,
is not, even though the cable company may tell you that it is (just)
within specs.

I've tried just about everything and can't seem to find the problem. I have a
cable modem connected to a router and the router is connected by wire to
three other computers.

Normally, if I reset the router and modem by unplugging them and the
replugging them the network works fine. However, after an hour or so of
surfing the web or playing an online game the network just "stops". I'll try
to connect to the internet and nothing will happen, as if the cable modem or
router just stopped working. Then, I reset the router and modem again,
restart the three computers and the network will be up and running again for
about another hour. This problem has persisted despite the fact I have bought
a new router and cable modem. Any suggestions

Please respond to the Newsgroup, so that others may benefit from the exchange.
Peter R. Fletcher