Network Problems

rac · Posted: Tue Nov 05, 2002 7:44 pm Post subject:

Is the cable plugged in? Does switching cables help?
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klieber · Posted: Tue Nov 05, 2002 7:49 pm Post subject: Re: Lost my net, lost my mind

phong · Posted: Tue Nov 05, 2002 8:45 pm Post subject:

It's also a good idea to try a different hub or at least different ports on the hub. I was having a helluva time debugging a network problem at home - then I tried just moving the network cables to different ports on the hub. Turns out that my prehistoric (but free!) 24-port 100-BaseT-only hub was finally dying one port at a time. 'Twas rather embarrasing since it took me hours to figure out.
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timbo · Posted: Fri Nov 08, 2002 11:21 pm Post subject:

I've struck this problem too.

I used tomsrtbt to set up a Gentoo server and even after the first boot ifconfig says all's ok but I can't ping anything outside it ie the other machine at the end of the cable.

Tim

timbo · Posted: Sat Nov 09, 2002 6:05 am Post subject:

Well I've spend all afternoon going over this and the only difference i can see between booting with tomsrtbt is that the 3com card is on irq10 and io 0x300 and when i boot with gentoo it's on irq5 and 0x220.

Using gkrellm on this box I can see the pings from both machines but neither respond to them.

Regards
Tim

rac · Posted: Sat Nov 09, 2002 6:17 am Post subject:

timbo · Posted: Sat Nov 09, 2002 8:48 am Post subject:

I've recompiled the kernel BUT........

I can load and unload the module and with say;

insmod 3c506 irq=10
ifconfig eth0 192.18.0.3 up

And it does the same thing ping send packets but nothing returns from either machine, if I reboot with tomsrtbt alls well after reassigning the ip number and setting the gw.

Any more sugestions....

Regards
Tim

pilla · Posted: Sat Nov 09, 2002 1:59 pm Post subject:

Can't you set also the io ?

Have you tried rac's suggestion? Maybe it is just the case of some misconfiguration in your network adapter.

Another possibility is to play with BIOS (sometimes it helps, sometimes it does not)

timbo · Posted: Sat Nov 09, 2002 7:00 pm Post subject:

Bloody Bastard

Reading some of the networking howtos etc they'v said that if your "unlucky" enought to have an isa nic you'll be in a world of pain....... man do i believe them.

the 3c509 driver will not allow you to change the io even though they give you a line that you can pass to the kernel with lilo.

Really odd thing is that the car works with tomsrtbt and the only difference is the io and the driver, which is my next port of call. I've recompiled my kernel with modules instead of it in the kernel.

Regards
Tim

pilla · Posted: Sat Nov 09, 2002 7:51 pm Post subject:

But have you tried the utilities that 3com distributes? They are quite handy...

timbo · Posted: Sat Nov 09, 2002 8:55 pm Post subject:

Bloody Bastard

Doing that as we speak... really looks like it's the io port.......

Regards
Tim

pilla · Posted: Sat Nov 09, 2002 10:11 pm Post subject:

If you cannot make it work with those tools, you can also try changing values in your BIOS for that ISA. Sometimes weird things happens when PnP is being used. Maybe some reservation of that address for your NIC could help.

Good luck.

timbo · Posted: Mon Nov 11, 2002 2:41 am Post subject:

Well well well....... three holes in the ground........

I was just about ready to give up, when. I had tried the 3com utils and set the card to irq10 and io220 that I knew Gentoo was using when the card was in PnP mode but it still would not ping.

So I pulled out the modem and sound cards which I have not got to configure services for yet and low and behold away we go as simple as that.

Thanks everyone for your help much appreciated.......

Regards
Tim