[SOLVED] dual NIC, eth0 (wired), eth1 (wireless)

On the ThinkPad R32, I have 8.10 Intrepid installed.

/etc/network/interfaces, auto eth0 -- wired iface eth0 inet dhcp auto eth1 -- wireless iface eth1 inet dhcp

Both NIC connect to 192.168.1.0 subnet.

My question is how to autodetect on such condition, 1) if eth0 is wired to a router 2) signal on eth1 is too weak, auto shutdown eth1

I do not like the idea, use sudo ifdown eth1 command manually. Not all users on this laptop have sudo privilege.

Thanks

do a "man interfaces"

near the top of the manpage you see a section with "up flush-mail"

What you can do is very simular -- Assuming that if the wired connection is up -- you want to use it.

iface eth0 inet dhcp
up teardown-eth1
down bringup-eth1

Where teardown-eth1 is is simple script in your path with "ifdown eth1" and bringup-eth1 is a simple script in your path with "ifup eth1"

Thanks, it is very clever. Let me try it.