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  Computer can't find the DSL router/modem, please help! 
 
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drupp el Dec 23, 2004, 06:54pm EST Reply - Quote - Report Abuse
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I have two computers with Windows XP, they were both connected to the internet via a hub and an Alcatel Speedtouch 510i ADSL modem/router. The adsl modem has only have 1 ethernet port, so I set it up like this:

PC1 Network card 1 ----> ADSL modem
PC1 Network card 2 ----> Hub
PC2 Network card -------> Hub

I set up the network using the Windows XP network installation wizard. Everything worked perfectly except one thing, if someone played a game or listened to music on PC1 while someone used the network on PC2, it would freeze after 1-15 minutes, while PC2 would not freeze. But that was not a very big problem.

About five days ago I suddenly couldn't use the internet on PC1/2, but if I linked PC2 directly in the ADSL modem it worked on that machine. I have now tried for hours to get internet access on PC1 again, but with no luck. I have checked cables, tried to re-install network, changed many settings, tried to access the router settings on the 10.0.0.138 gateway (couldn't). The computer simply can't find the modem!

This is the settings the computer is supposed to get from the DHCP:
IP: 10.0.0.x
255.255.255.0
Gateway: 10.0.0.138

I have tried to set up the network again via the XP network install wizard on both machines, but with NO luck.

So any help would be extreeeemely good.


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Sean B Dec 23, 2004, 07:15pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
Hubs are only used between intermittent switch or router connections, where it isn't permissible to install a switch. The only reason I've ever considered a hub even remotely helpful is when you reach the maximum possible ethernet cable length before the signal drops off.

The reason you're freezing is because hubs aren't able to sustain full duplex, bi-directional connections simultaneously.

TAKE NOTE OF THIS PEOPLE: ALL ROUTERS HAVE THE SAME PROBLEM!
Routers attempt to correct this by load balancing, which actually divides the bandwidth per port. So, if you have a 100MB/s router and are using two ports, you're only potentially guaranteed 50MB/s per connection.

The best piece of networking equipment you could ever possibly use is a switch.

+They're plug and play, requiring no port forwarding or IP configurations on them.

+They operate at full duplex bi-directional speed on all ports simultaneously. This means you have 200MB/s total per port, or 100Mb/s both ways.

+They're cheaper than routers. I was able to purchase an 8 port switch for $16.

+ and best of all, if you're on a DHCP service, you'll be able to have seperate IP addresses for every computer

drupp el Dec 23, 2004, 07:31pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
Ok, I know a hub is bad to use, i'll buy a switch or something some time.

But right now I need internet at least from the modem to the computer, without using the hub and sharing the connection, so that I just need to plug the cable in the other computer when I need to use that.

But that wont work, so I need help.

drupp el Dec 23, 2004, 08:19pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
I'm going to sleep now, I hope someone post some help.

Sean B Dec 23, 2004, 08:45pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
Your modem has a web configuration. Just connect to 10.0.0.138 in your favorite browser, you don't need to configure your IP address or anything.. leave it on DHCP.

drupp el Dec 24, 2004, 08:03am EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
I have tried that many times, I can't view 10.0.0.138 on my browser! It can't communicate with the modem.
In any installation software it says it can't find a modem.

Help! what do I do??

Sean B Dec 24, 2004, 09:39am EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
Instead of using DHCP, try assigning the IP address within range.. such as 10.0.0.1.

And plug your system directly into the modem, don't use the hub or anything.

drupp el Dec 24, 2004, 09:01pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
I've tried, but it won't work with the IP set manually, it must be set to receive automatically (It says so in the manual). But when the computer refuses to connect with the modem, how is it supposed to get an IP!?
Also, In the modem settings I can set it to different modes, I think it was PPPoE(current), PPPoA, and Bridge. Will choosing an other mode help? And is it possible to turn DHCP off, and make it possible to change IP manually?

Sean B Dec 24, 2004, 10:11pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
You might as well set it up as a bridge and throw a switch on it.

That's how I have my modems set up.

drupp el Dec 26, 2004, 06:05pm EST Reply - Quote - Report Abuse
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Edited: Dec 26, 2004, 06:07pm EST

 
>> Re: Computer can't find the DSL router/modem, please help!
Since my other computer CAN find the modem, I can configure it. I used the easy setup wizard to set the modem up as a bridge, but no luck, my main computer can't find the modem in bridge mode either.
I can't even set up a local network network on the two computers!
How can it be!? my main computer can't find the modem anymore, but this computer can. I've tried with a different network card but it still won't work! Also, if I'd try to use a switch, the computer probably wouldn't have found that either!



Please someone, HELP ME!

Sean B Dec 26, 2004, 08:19pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
Switches don't have a software interface, that's why they're faster.

drupp el Dec 30, 2004, 04:13pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
I formatted the harddrive and reinstalled Windows, now everything is back to normal :-)

Sean B Dec 30, 2004, 04:17pm EST Reply - Quote - Report Abuse
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>> Re: Computer can't find the DSL router/modem, please help!
Possibly a winsock problem then?


I should've just sent you this: http://www.cexx.org/lspfix.htm


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