topic Re: ethernet problem in Operating System - Linux

ethernet problem

Fadia Almarei — Mon, 02 May 2005 08:24:19 GMT

Dear All
i have Redhat Enterprise Linux AS v.4 ,run on Dell server , i have two network cards , i configutre the first ethernet card and give it a static IP, i see something strange , whenever i restart the network service the ethernet become inactive and i need to activate it again ,what is the cause for this.
BR,
Fadia

Re: ethernet problem

RAC_1 — Mon, 02 May 2005 08:37:43 GMT

Any duplicate ips on the network??
What does messages log file say??

Re: ethernet problem

Fadia Almarei — Mon, 02 May 2005 08:42:06 GMT

no duplicate

Re: ethernet problem

RAC_1 — Mon, 02 May 2005 09:06:43 GMT

How do you activate it?? Are there any error/informational messages in /var/adm/messages file??

Re: ethernet problem

Rick Garland — Mon, 02 May 2005 09:40:36 GMT

You state a static IP for the 1st eth, how is the 2nd eth configured? Any chance the config is overlapping to both eth cards?

Re: ethernet problem

Rick Garland — Mon, 02 May 2005 09:43:47 GMT

A thought that just occurred;

Are both cards configured with unique names and their respective scripts have no overlap?

Look in the /etc/sysconfig/networking directory and the /etc/sysconfig/network-scripts directory. Any misstated info in these scripts?

Re: ethernet problem

Huc_1 — Mon, 02 May 2005 09:46:24 GMT

In the file /etc/sysconfig/network-scripts/ifcfg-eth0 you should see a line like

ONBOOT=yes

Jean-Pierre Huc

Re: ethernet problem

Steven E. Protter — Mon, 02 May 2005 10:36:08 GMT

I've noticed some anamolous behavior with Red Hat 4.

I lock down the network configuration, fixed both or three cards. Then, after a few days of undetermined use a new file appears in /etc/sysconfig/network-scripts starting with a : and looking like one of those configuration files.

Networking is okay until restarted, then the external interface doesn't work properly. Remove the strange little file and restart the network and all is well.

I was suspecting some kind of buffer overflow creating a file except the whole directory is chattr +i on my system since its exposed to the Internet.

I suggest a look around in /etc/sysconfig/network-scripts for files that simply do not belong.

SEP

Re: ethernet problem

Gopi Sekar — Tue, 03 May 2005 00:19:10 GMT

Check /etc/sysconfig/network it should have NETWORKING=yes

Hope this helps,
Gopi

Re: ethernet problem

Alexander Chuzhoy — Tue, 03 May 2005 00:37:57 GMT

I'd check first Huc's suggestion.
Unless you have ONBOOT=yes in
/etc/sysconfig/network-scripts/eth0
the interface won't become active upon start/restart of network service.
Regards.

Re: ethernet problem

Fadia Almarei — Tue, 03 May 2005 01:34:02 GMT

thanks gues the problem solved , the ONBOOT was no ,so i change it and every thing is OK