Intermittent connection issues, "Default gateway is not available."

[selu23]

Intermittent connection issues, "Default gateway is not available."

I have a Motorola SB5100 modem connected to a Netgear WGR614 v7 router. I then have my Xbox 360 and Desktop connected to the router. With this setup, there will be periods of time in which my internet will disconnect, but all the lights on both devices will stay lit. When I disconnect my Desktop from my router and plug it directly into my modem, and this issue appears, when I run the Network Troubleshooting on Windows 7 it tells me "The default gateway is not available."

This issue has been driving me crazy for the past few weeks now. I've placed multiple calls to my ISP and had several tech visits, all to no avail. I've also tried searching the internet for fixes, of which none worked. I have tried:

-Flushing DNS
-Manually setting default gateway in command prompt
-Unplugging my modem and plugging it back in
-Setting a static IP
-Turning off all TCP/UDP offload settings on my NIC
-Updating my NIC's drivers
-Removing and reinstalling my NIC's drivers
-Installing a NEW NIC, to no avail
-Replacing the modem
-Replacing the ethernet and coax cables
-Turning off IPv6

If anyone has had this similar problem and has advice/a fix, I'm open to suggestions. Attached is IPCONFIG and a HijackThis log.

 

[Darryl Licht]

I have a Motorola SB5100 modem connected to a Netgear WGR614 v7 router. I then have my Xbox 360 and Desktop connected to the router. With this setup, there will be periods of time in which my internet will disconnect, but all the lights on both devices will stay lit.

Is this an ISP provided router, or your own??? If it is your router, try updating the firmware first... I didnt see that in the list of what you tried. If it is an ISP provided router... DEMAND A NEW ONE!

When I disconnect my Desktop from my router and plug it directly into my modem, and this issue appears, when I run the Network Troubleshooting on Windows 7 it tells me "The default gateway is not available."

Did you reboot PC or release/renew IP after trying this switch? It sounds like maybe you didnt and the PC was looking for the router at the Gateway IP!

Please let us know how this goes...

 

[selu23]

Thank you for the response. The router was provided by the ISP, and I do intend on getting a new one in the upcoming days. However, the router I had previously, which was also provided by the ISP, had similar issues. That's what prompted me to replace it with this one.

I also attempted the fix you suggested, to no avail. The intermittent connection issue persists. Sorry for the late reply, and I appreciate the help.

 

[Darryl Licht]

Ask your ISP if you can purchase your own router... many do allow it and at the rate most ISPs charge to lease a router, it can pay for itself in a matter of 10-12 months on average!

 

[selu23]

I'm sorry Darryl, I completely misread what you had posted. The ROUTER is my own, I purchased it. It is the MODEM that's been supplied by the ISP.

 

[Darryl Licht]

Have you tried resetting the router to factory defaults after upgrading the firmware?