Re: [SLE] IP address is lost with cross-cable

Fajar Priyanto wrote:
Hi all,
I have a strange experience.
This morning I was preparing to go to several of our branch offices to install OpenSuse10.1. My preparation was to bring my notebook and a UTP cross-cable, because I planned to do a network install.

So, I checked the cable by plugging my notebook with my desktop PC. All was good, I could do FTP from the desktop pc to the notebook. So, I went to the branch.

What suprised me was, when I plugged in the cross cable to the desktop PC at the branch, my notebook lost it's static IP address! No matter I tried to configure it using Yast, the IP just didn't show up. I tried to configure it using CLI: ifconfig eth0 192.168.1.200 netmask 255.255.255.0. It managed to show up, but, the desktop PC couldn't connect to it, and I couldn't ping the dekstop PC from the notebook.

So, I thought I would give up the cross cable and connect the notebook to the branch office network cable, and.... it worked! The IP is there. Well, at the end I managed to do network install, but using the existing network, not the cross cable.

Can anyone suggest me what went wrong? Why the cross cable works at the headquarter, and not at the branch office?

I remember that some network card just cannot be up-ped if it's not connected to a real switch. Something using MII-NOT-SUPPORTED options in the ifcfg-eth0 script. Is this the case?

Thank you very much.

By the way, my notebook is Acer TM 802, with ALI BCM4401 network card, and the desktop PC at the headoffice and branch office use RTL8139too network card.


Are you configured for DHCP? If so, you won't get an address, when connected to another computer, unless it has a DHCP servier running. Also, your NIC may be configured to be up only when there's a valid ethernet connection. If that crossover cable is bad, the port might not come up.


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