On Fri, 23 Mar 2001, Wes Owen wrote:
> I had a server with one network card it in configured and running on the
> internet with a single set IP address (no dhcp, etc). I wanted to add
> another network card into the machine so I could have one for backups and
> not have to worry about metering the backup traffic. So bought a 3Com 905
> card and popped it in and rebooted. Red Hat 6.2 saw it and asked me to
> install it so I did. I gave it the IP address 192.168.0.4. I left the
> rest of the settings as defaults.
>
> I then rebooted the system to find that my live network (not the back end
> one) was completely dead. My 2 network cards initialized fine, and
> ifconfig shows them correctly with the correct IP addresses, etc, but if I
> try to ping another machine, nothing happens.
>
> I played around some more to find out that if I ping another machine,
> ifconfig will show the packets leaving and coming back to the machine, but
> I get 100% packet loss. If I ping 127.0.0.1 it pings okay. If I ping the
> IP address of the box (live IP), it has 100% packet loss, and if I ping
> 127.0.0.4 I get 100% packet loss.
>
> My guess is that it is a routing problem. Anybody help? Is there anything
> I should have to do when I add second network cards into the machines?
>
> Also, I want this back end network just for tape backups. When the network
> config asks for a default gateway can I leave that blank?
>
> Thanks in advance for help! I need to get this machine back up ASAP!
>
> Wes
>
>
Please show us the output of "ifconfig" and "route -n".
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