[SLUG] Suse 8 network problem

[Gavin Baker]

On Wed, 2002-09-25 at 09:48, Chris More wrote:

> Can anyone help with a problem I have with my mini-itx machine when running 
> suse 8.
> 
> I am trying to network a win98 box to a mini-itx running suse through a 
> crossover network cable, but I can't get either machine to ping each other.
> 
> I can dual boot the mini-itx into win xp and have absolutely no problems when 
> networking xp to win98.    Which means there are no hardware problems.

When the module is loaded, what does dmesg (or /var/log/messsages or
/var/log/syslog) say? everything ok? 

Is the module actually loaded? (lsmod)

Is Linux using the same IRQ as Windows does? (/proc/interrupts, first
collumn is also the same as what ifconfig says?).

What Network card is it? Is it a PCI one or something exotic?

> Under suse, as far as I can see, the network card is installed ok and is even 
> receiving and sending packets (when queryed using ifconfig).
>
> It seems to be something to do with the suse setup because I can't even ping 
> 127.0.0.1 without manually adding eth0 to default route.

I agree. If the loopback interface isn't even being configured,
something is really wrong. I would try stop all networking
(/etc/init.d/network stop) then configure it manually, just to be sure
it is only a config problem.

ifconfig lo up  (bring up the loopback interface)
ifconfig lo     (make sure it worked)
ping 127.0.0.1

ifconfig eth0 192.168.0.1 up
ifconfig eth0 (It worked?)

ipchains -F (or) iptables -F  (make sure no filters are being used)

echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all 
echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts

The box should reply to pings from the other end of the crossover (only
to it's IP address of course, and not its hostname) and vise-versa

> Its been driving me nuts for about a week now... Any ideas?  Have I missed 
> something obvious?  like not being able to use a crossover cable with linux?

The latest linux kernels have more advanced networking features than
Cisco boxes. So ofcourse, a simple crossover cable should not be a
problem. From what you have mentioned, i would think a simple config
problem is the cause.

If the above worked, you need to edit the appropriate
/etc/sysconfig/network* files. If it didn't, can you provide some more
info? perhaps the output of running script while trying the above or
such.

Let me know,
Regards,
Gav