On Wed, 09 Aug 2000, C. M. Martin wrote:
> I have an IBM NetFinity 1000 running Caldera OpenLinux 2.4. The system needs
> to be dual-homed, and the system seems to recognize both ethernet cards. One
> is on eth0, IRQ11, and is working properly. Network connectivity is just fine.
> The other is eth1, IRQ10, different I/O memory range from the first card. The
> box can ping itself at that address, but can't see any other box on that
> network, and nothing on that net can see this box.
>
> I went into the network settings with COAS and found that the default gateway
> wasn't set on eth1. I tried setting it, but the system would not save the new
> settings. Sometimes it gives me a python error saying it cannot communicate
> with the network, sometimes not. It reads:
>
> Error when executing command ip-config change eth1
> the command produced the following output:
> SIOCADDRT: Network is unreachable
> eth1: initialization failed
It's probably a routing problem. Here's how to fix/troubleshoot it
interactively, though I don't know how to fix it with COAS.
Run "/sbin/route" and see what it gives you ("man route" if you need help
understanding what it says). Ifconfig just sets up the IP on the card; it
doesn't tell the kernel which interface to send packets through in order to get
to a certain net. The kernel needs to know:
- that it can send packets to eth1 to get to itself
- that it can send packets to eth1 to get to the rest of the world.
IIRC, that means you need to do something like:
# /sbin/route add -host $IP_FOR_ETH1 eth1
# /sbin/route add -net default gw $YOUR_GATEWAY netmask $YOUR_NETMASK eth1
Let me know if this works; I haven't tested it, but I was playing with this
yesterday, so it's fairly fresh in my head.
srl
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