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Old 07-24-2008, 08:37 PM   #1
Registered: Nov 2006
Posts: 71

Rep: Reputation: 15
CentOS 5.2: Only one of eth0 (internet) or eth1 (LAN) works

I am trying to setup a server with two networks, internet access through eth0 and LAN through eth1. The problem is that only one of them works at a given time.

I tried to specify route through the Network GUI for the corresponding device but it says 'file already exists' in case both devices are simultaneously have route set. I am confused over this and I have been using the same IP and subnet masks that I have been using prior to the installation of CentOS (on SuSE).

Can someone advice me on getting both eth0 and eth1 working simultaneously please?

Thanking in advance,
Old 07-24-2008, 09:29 PM   #2
Registered: Sep 2007
Location: SF Bay Area, CA
Distribution: CentOS, SLES 10+, RHEL 3+, Debian Sarge
Posts: 159

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Its really hard to troubleshoot routing issues without route, or contents of ifcfg-eth0 and 1.

Can you please supply the following information:

- printout of route
- contents of /etc/sysconfig/network-scripts/ifcfg-eth0
- contents of /etc/sysconfig/network-scripts/ifcfg-eth1
- IP/subnet mask of eth0 and eth1
- gateway/router interface IPs


Last edited by kenoshi; 07-24-2008 at 09:30 PM.
Old 07-24-2008, 09:42 PM   #3
Registered: Nov 2006
Posts: 71

Original Poster
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Thanks kenoshi,
Yes, I should have done it. Was experimenting and lost connection with the system altogether. Will post it in an hour.
Old 08-20-2008, 04:52 AM   #4
Registered: May 2008
Location: Bangalore
Posts: 31

Rep: Reputation: 6
I also need help for that eth0 and eth1 in REDHAT 8

I also want to connect to the internet in eth0 and eth1 for LAN work . How can I use that simultaneously in REDHAT 8 . plz send me reply


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