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Lose Internet Connection Periodically

By Dragon Emperor ·
When connected to the internet I have full access for a seemingly random amount of time. Sometimes I can go days, other times only a few minutes. Usually it is more like 30 minutes.

When the problem happens I cannot read email or browse the internet. I can still ping and access network computers. The only way to regain access appears to be a reboot.

I have wireless broadband.
All computers are running Windows 2000 SP 4.
I have an SMC Barricade 7004BR router and an Asante FriendlyNET switch.
All computers are protected by up to date firewalls (Sygate) and
antivirus (Panda).

The problem occurs when I directly connect to the broadband modem as well.

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by Dragon Emperor In reply to Lose Internet Connection ...

Point value changed by question poster.

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by LMon In reply to Lose Internet Connection ...

Do you have any bridges on your lan connections if so try removing them.

Also check with your modem and router's manufacturer to see if this is a known issues they may have a firmware upgrade that will fix the problem.

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by Dragon Emperor In reply to

The problem happens when I connect directly, so it is not the router (though unlike Linksys, this is not a known problem for SMC routers).
My network topology is all machines connect to the switch, which connects to the router, which connects to the wireless modem. Connecting a system directly to the modem does not help.

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by CG IT In reply to Lose Internet Connection ...

I would venture it's your router that is causing the dropped connection. As to why, could be a # of issues. WAG, it is a firmware bug.

I had a SMC 7004 ABR router a couple of years back. Dumped it as it seemed to just be flakey. Went with a Linksys.

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by Dragon Emperor In reply to

The problem happens when I connect directly, so it is not the router.

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by shiny_topadm In reply to Lose Internet Connection ...

I agree with the other posters that a router problem is the most likely. When you say a reboot fixes it, is that a reboot of the router? I too have seen somewhat "flakey" versions of this product. Current firmware is version 1.93 and is available for download from www.smc.com. You can check yours by logging in to the router, on the 'tools' page there is "Information" which should list the current version number. HTH,

---Will

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by Dragon Emperor In reply to

The problem happens when I connect directly, so it is not the router. And it is a reboot of the computers that fixes the problem. The router also has the newest firmware and I have not had problems with it in the long time I have had it (I telecommute over a VPN, use an internet phone and play lots of multiplayer games, so it gets used alot). Only with my newest ISP has there been problems, and they claim they don't know what is wrong.

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by lmayeda In reply to Lose Internet Connection ...

Can I assume that when YOU cannot browse the internet, the same goes for the other PCs on the network? When this happens can you ping an IP address outside of the network (ie your ISP?). Could it be a problem with the IP address of your DNS server (is it set to detect automatically or do you specify one or more DNS IP addresses)? Depending on your ability to ping outside the network when your brower "goes down" you may want to try a different DNS server. If you and the rest of the LAN cannot ping out, then it sounds like either your router is flakey or your ISP is flakey.

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by Dragon Emperor In reply to

Yes, if I have multiple machines connected at a time and the connection goes out it is for them all. I can ping the internet. Since the ISP has been useless in solving the problem I am running out of troubleshooting options.

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by shmaltz In reply to Lose Internet Connection ...

A reboot of what? The switch? The modem/router?
You don't mention what type of connection you have, xDSL? Cable? T-1?
I have seen this happen when using xDSL, that uses PPPoA (PPP over ATM, not to be confused with PPPoE), or EoA (Ethernet over ATM). I don't know if a T-1 that uses any of the above (PPPoA, or EoA) has the same problem. I don't know exactly what the problem is, but every so often the PPP will get corrupted and the only option is a reboot of the PPP client device. But I'm not sure why it happens on EoA.
In most case if this is the problem you only have 2 options:
1. Work with your ISP to correct this, make them aware of this problem, and see if they are interested in fixing it. If not you will be forced to use option 2
2. Change ISP.
However I did see that sometimes in the case of xDSL changing the Modem/Router to another brand helped (BestTel looks to be the best).

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