D-Link router (Switch) wont issue ip address's

Hello.

First off i would like to say that my system and problems are almost identical to this users problem (old thread) http://www.windowsbbs.com/networking/26622-network-computers-see-dont-see-each-other.html but i have around 4-5 computers running off my router. I am currently directly connected to the modem so the net works on my computer, then the modem is plugged into the router via cat5 cable.

Everyone on the network has the same problem, they get a error message saying limited or no connectivety and have the ip address's of 169.x.x.x.

I have tried everything i can fix of to fix this problem. Including the fix posted in that thread i posted. I have even completly uninstalled and wiped everything from all harddrives and reinstalled everything including windows xp and still nothing.

Sometimes one pc will start working fine. When this happens its all perfect. Like my sons pc, he is a gamer and has a powerfull pc, he went to a lan yesterday with his pc and when he returned homed and plug his pc in it just wouldnt connect. For the record at the lan he used his 1gb NIC card and at home he uses his 100mb NIC card.

I have replaced the modem, i have replaced the d-link router with one of the same type (new) i have used other net cables and still nothing.

Any help would be greatly appreciated. If you need more information on this subject please tell me and i will gladly post the required information.

 

New discovery. My network is very unstable, i set ip of my computers local area connection 11 (the d-link router) to a static, then on my sons i did the same, nothing... then when i took my sons ip off static everything connected fine. Also ive just been told my daughters computer has had connection since yesterday morning, yet i cant get connection on my wifes. For now ill leave my ip as static to keep my son happy.

Does anyone have any idea's on anything i can try?

 

Hmmm... that section of your post catches my eye. If your son's PC is being regularly used on other networks, I wonder if it is remembering the other network's settings and those settings are conflicting with your network settings.

For example if his computer is getting 192.168.1.101 from another network, and is then connection to your network that is also using the 192.168.1.0 subnet, then you are likely to get conflicts.

The other thing to look out for is other devices acting as DHCP. You indicate that you have both a "modem" and a "router" on the network. Hardware labelled as a "modem" can often have router functionality. Make sure you do not have both devices trying to act as you DHCP server. On a small network there should be only one device giving out DHCP settings. I'd suggest that you check that your modem doesn't have a DHCP service enabled.

 

Ok so i done what TonyT said, and a number of things happened, the net went down on my daughters and it came up on my wifes. So we left it like that for a day or so, and just now my sons net went down while he was using it. He said the last thing he done was unplug his headphones microphone port and it went down and restarted his pc (he might have accidently pushed the restart button), then to fix the problem he pulled it out again and plugged it back in and his net work again.

Weird.

 

Ok, now my computer cannot connect to the motorola surfboard, through the usb connection i have. But everyone on the router can (note: i am no longer connected to the router)

What if there is a problem with my computer, say a virus or something got in and got some files before my anti virus program could pick it up. Would this cause problem for the whole network like it is? Would this make my network jumpy?

If anyone has any idea's please throw them out here.

 

The Surfboard can use the USB & Network ports simultaneously but only if the ISP assigns two IP's. My provider does offer this service but at additional cost.

Agreed if the OP only has one public IP address then all the systems should be conected via the router.

 

Sorry i havent been clear enough.

My pc is connected the modem via usb, and my computer is also connected to the modem (so i can change the settings on it, etc).

Here's what happened today. While making copies of my dvds my computer got a blue screen, when it turned back on my net was working fine, and so was my wifes and my sons. I find this really odd and confusing, which leads me to believe the problem is with my computer (my computer is the only one that hasn't been wiped since the problems started)

 

As TonyT suggested, Try connecting via the router only.

 

I have D:

 

OK,

Are you still experiencing problems?

Can you tell us the exact setup of your network...

What's connected to what and how (Wired/Wireless/USB)?

What has fixed IP's and what relies on the router's DHCP?

What systems are used to connect to other networks?