Dear All,

I have two ethernet:
- eth0 is wired (192.168.100.10)
- eth1 is wireless (192.168.100.12)

Both are recognized by kernel and working

currently:
- eth0 is set to be down
- eth1 is set to be up

I have set /etc/rc.d/rc.inet1.conf, but
confused with gateway setting.

My network should have gateway 192.168.100.1

But, with /etc/rc.d/rc.inet1.conf, when
i set gateway to 192.168.100.1, i can not
ping any host.

When i check route -n output, i see that gateway
is set to eth0, which is down. It should be eth1,
which is up.

So, temporarily, i have to set eth0 to be down,
in order to make a working connection.

My questions:
1. How to make gateway automatically set to
device currently up?
2. I want both device are set to be up, even
no cable is plugged into eth0. But, when
there is cable plugged, it can automatically
work.

Best regards,
JE

I don't have a machine to try this on but my first thought is to add a second route.

route add -net 192.168.100.1 netmask 255.255.255.0 dev eth1

I'm not sure how the system would handle priority but do you really care which interface is used by default?

check out "man route" or http://linux.die.net/man/8/route

I hope this helps

when you edit rc.inet1.conf, be sure that the gateway is set for eth1 instead of eth0 (there are 4 configuration 'slots' in that file).

Thank you.
I will read route manual again.
But, i hope i can do it without adding new command to rc.local.

JE

But, I only see one GATEWAY variable for many interface definition. How could i set gatewat for eth1?

JE

sorry, didn't do enough research

rc.inet1 is only scripted for the default gateway, and it would take a bit of scripting to add a GATEWAY[*] variable to rc.inet1.conf.

Try setting IFNAME[0]="eth1" and see what happens. If it doesn't do what I think it would do (which is set up the default gateway thru eth1), then I'd recommend adding a line to rc.local.

Or you could modify line 188 of rc.inet1

If you define multiple default routes, your system will use all of them at random. If you have two default routes defined, and one of the routes is dead (like with the de-attached eth0 in the first post) then half your network packets will not arrive, and you will be quite dissatisfied with network performance.
Really, this type of setup (two cards, in the same network IP range, of which one or the other may get disconnected) needs DHCP in order to dynamically reconfigure the default gateway.
You can also run which will shortly disconnect you from your network but will also setup the correct new default route to the other network card, in case you unplug the wired card.

Eric