lspci shows eth0&eth1 but no network [solved]

bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

Here is my situation. I used the 2004.3 universal CD to do a stage 3 install of kernel 2.6.9-r1. My computer is a Sony Viao laptop, and the built-in ethernet has not worked for a while. ALso, I had to use a PCMCIA CD-ROM drive, since that is the only CD drive I have. During the installation process the liveCD recognized the built-in card as eth0, but i could not get it to work. After finishing the rest of the install (used genkernel), i wanted to see if I could get the network set up (I have a cable modem). So i took a PCMCIA ethernet card from another laptop to see if it would work. The PCMCIA card is a Netgear FA511, which appears to generally work on Gentoo. The card is recognized in lspci. It also shows up in ifconfig initially, but only for a little bit.

I dont know what to do to get the network up and working. I have tried dhcpcd and nothing happens. pinging google returns :unknown host www.google.com. Any suggestions would be greatly appreciated.

My lspci file includes:

beandog · Posted: Tue Feb 08, 2005 6:15 am Post subject:

Having the system recognize the hardware and having it actually get you on the network are two completely different issues.

The easiest way to get things working is probably just configure your kernel with all the modules that look like it might be related to your network hardware, and reboot to see what the kernel does.

That, or try net-setup eth0 from the livecd after manually loading modules.
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bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

The kernel seems to recognize all my hardware, since it shows up in lspci. [Is this not true?]

If it does recognize it all, how do i go about connecting?

beandog · Posted: Tue Feb 08, 2005 6:30 am Post subject:

bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

Yes, I tried that with eth0 during the install. The CD recognized the card but net-setup and dhcpcd failed. Since both my CD and other card are PCMCIA, and my laptop has only one PCMCIA slot, i don't know how to do this with the second card. Any advice would be appreciated here.

I tried net-setup from the installed kernel, but the command does not exist.

beandog · Posted: Tue Feb 08, 2005 6:38 am Post subject:

Ah okay I think I read you wrong there .... so you have the module loaded, right? But you can't get your network to give you an ip address, is that correct?

Edit: What are you connecting your network cards into -- another router or straight into your cable modem or what?
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bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

Right, modules are loaded and I cant get the network to give me an IP address. Plugged directly into cable modem.

beandog · Posted: Tue Feb 08, 2005 6:47 am Post subject:

Did you ever have a network card that could get on the net that was plugged directly into the modem? If so, the modem or your cable provider might be caching your mac address, and you'd need to change it to that old one.

Whats your /etc/resolv.conf say?
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bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

Re: mac address

Yes, I am using the cable modem right now with a different computer. Perhaps that is the problem. How do i determine the mac address on a windows xp computer?

Re: /etc/resolv.conf

domain [my domain name]

Should there be more in here?

beandog · Posted: Tue Feb 08, 2005 7:21 am Post subject:

Yah, you should have your nameservers in there.

Here's mine:

bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

OK, tried that. Didnt work. What is the search line for?

Also, what info do i need from the windows machine? There is no entry that reads mac.

beandog · Posted: Tue Feb 08, 2005 3:50 pm Post subject:

Im not sure what the search line is for. I think it resolves all domains that can't be resolved to their address or something. Maybe not.

Anyway, if you can, boot into windows and post the output of ipconfig /all
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bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

sdibb - thanks for your help. I hadnt even been thinking about issues outside of the operating system.

I think that is likely the problem. I figured out the mac address for the Windows computer. After searching a bit on the ISP website, it appears that if you want to attach a different mac to the cable modem, you have to call them and set it up. I guess that is what i should try now. Not sure if this is worth doing, since the implication is that only one mac address is allowed to be specified at a time, and there are two laptops that id like to use. I assume that setting up a router would solve this problem?

UNLESS - I know each NIC is supposed to have a separate MAC. Is there any way to set the MAC on my network card to match the MAC on the network card on the windows computer?

beandog · Posted: Tue Feb 08, 2005 4:55 pm Post subject:

bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

I don't believe that macchanger is on the universal liveCD. (it is not in the contents list) Is there any other way to do this, perhaps using ifconfig?

I am at work right now, so I cant try emerge macchanger immediately.

beandog · Posted: Tue Feb 08, 2005 5:11 pm Post subject:

Oh yah .. you can do it using ifconfig, now that I think about it.

I dont know the exact command though, but I'm sure its in the man. :wink:

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bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

OK thanks - when I get home I'll read the ifconfig man and see if changing the mac address will solve the problem.

Thanks again, sdibb.

[edit] I think the proper command is

bpk2001 · n00b Joined: 03 Feb 2005 Posts: 10 Location: New York, NY

Sweet - using ifconfig to change the mac address (see prior post for command) was successful, and now dhcpcd returns an IP address. This might be a useful tip if you are trying to attach a new computer to a cable modem.