eth0 back up but no connection
 

On bootup it automatically connects but when I do ifconfig eth0 down and bring it back up with ifconfig eth0 up, I can't connect to anything. Any ideas out there?
Thanx

ifconfig needs to be given some extra parameters, eg at least an ip number..

Try using ifup eth0 and ifdown eth0 instead..

it says that the command ifdown or ifup is not found. do i have to set a path for it?

well, try this:
ifconfig eth0 up (or /sbin/ifconfig eth0 up)


R

Re: eth0 back up but no connection
 

That is what i did.
ifconfig eth0 up.

You did not read my posting carefully enough ;-)
See I also indicated /sbin/ifconfig eth0 up
Try that.
Failing that also try this
<code>
whereis ifconfig
</code>
to find the path to the program

R

The problem is not with finding ifconfig. I can run it and it will show the interfaces. The problem is that when I pull down eth0 and bring it up again there is no connection to the internet which i had at bootup.
Sorry if I didn't communicate my problem clearly.

OK, I understand now.
After you bring the interface up does it have an address? To make sure it does run /sbin/ifconfig (no parameters).
If it does assing a gateway to the internet pointing to the machine that is the inernet gateway like this:
route add default gw <address of the gateway> ethX
where X is the inteface of the gateway.

That should get you connected.

Hope this helps.

R.

Thanks. Do you know how to auotomatically detect the gateway for use on other lans sorta how it does it at boot time?

Well as far as I know it is done by a script. I use Slackware and I have a small network; therefore, I do not use DHCP and I have a static IP for each machine. With that, then, I have a specific address for the gw.
If you set up your system to run on DHCP I believe it should do it for you. Enabling your system on DHCP depends a bit on your distro, and if you are using something like Mandrake or SuSE it's very easy; other distros could be a bit more involed.
Hoe this helps.

R.

ifdown and ifup = debian
 

ifdown and ifup is for debian bud =)

I have the same issue after ifconfig eth0 down. I've gotta reboot to get a connection to the n3t

Just a thought ... do you have your /etc/hosts file set up?
It should have something like:
127.0.0.1 localhost # that is the loopback
192.168.1.1 it2web it2web # this is the gateway
192.168.1.2 spitfire spitfire # this is a computer in the network

So when you get the eth0 up it does know its ip.

HOpe this helps.

Rick

Still no luck. Guess i'll just have to kill dhcpcd and restart it!

Thanks for trying rick.