Losing Gateway

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gboy

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hi guys

I have a adsl router supplied by a very very large ISP.

they have configured it to provide DHCP, and then i plug in to a switch. there is nothing fancy IE no sub netting, that switch is a 16 port Netgear. connected to that, are about 12 PCs

now the funny thing is. at random times, on random workstations the computers will "forget" how to get onto the internet, IE the gateway gets lost.

you can still see the other computers on the local network, but no internet, then suddenly internet will be restored, and the cycle will continue. this is really irritating.

According to my ISP the DCHP is fine. (i told them to get someone else to check it). they are starting to blame my switch, could that be the case ? its brand new, plug and play, netgear.

any suggestions
 
I've had it where my pc's would suddenly not get the nameserver from the router.

Try connecting to websites from those machines with the ip address of the network.
 
If you have set the DHCP time-out to 48 hours, then the only other alternative that I can think of is that the poor thing is overwhelmed, and, it is still connected, but the other 10 machines are sucking the poor connection dry.
 
hi
thanks for the replies,

it looses the gateway completely, in Ipconfig the gateway is blank. i doubt that those machines are chowing the bandwidth as they are accounting / office machines. and its a 4mb line with a 10gb cap, in for july i have only used 6gb. so there is not a bandwith problem. the strange this is, the workstation next door, will be fine.
 
Anything in the eventlogs? Have you tried setting the card to 100 Full (clutching straws here:))
 
You say you have 12 pc's and the router is the gateway. Configure in TCP/IP V4 advanced settings a manual gateway. If this is XP, it would be easy enough to accomplish.

Long story short that's sure to fix the issue. Just add the IP Address of the router as a gateway in the TCP/IP config.

If this is XP, again, take a look at the DHCP Flag Hotfix, this is for SP3:
http://support.microsoft.com/kb/953761
 
hi guys

i will look at the event logs tomorrow.

sorry terra this is all vista machines. i would have to set the ips manually. kinda defeats the point, but maybe its the solution.
 
gboy said:
hi guys

i will look at the event logs tomorrow.

sorry terra this is all vista machines. i would have to set the ips manually. kinda defeats the point, but maybe its the solution.
Click to expand...

It actually doesn't defeat the point. You don't set the actual IP Address of each pc, you just add the Gateway IP. We've got the exact configuration at work, no gateway, no internet...:p
 
oh ok... now i understand.

its going to be fun with the laptops that come in and out though. they would have to change it each time.
 
gboy said:
oh ok... now i understand.

its going to be fun with the laptops that come in and out though. they would have to change it each time.
Click to expand...

No they don't :) You can add more than one gateway. Remember> TCP/IP V4 Advanced> Gateway> Add Gateway.. ;)
 
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