nslu2: two ethernets: one by default

[Xan <dxpublica@telefonica.net>]

Hi,

Perhaps it's a too much simple question, but I don't know what achieve 
that: In nslu2 I have two network devices: eth0 and wlan0 (wifi). I just 
want that:

- nslu2 tries if eth0 is plugged. If it's, then all network connection 
were established via eth0
- if eth0 is unplugged, then all network connection were established via 
wlan0.

Now the first is done, but when I unplugged the eth0 I can't reach the 
system (all packets loose)

Anyone could help me? I suspect that I have to touch the route table. Is 
it true?
My route table is:

# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
localnet        *               255.255.0.0     U     0      0        0 eth0
localnet        *               255.255.0.0     U     0      0        0 
wlan0
default         172.26.0.1      0.0.0.0         UG    0      0        0 
wlan0
default         172.26.0.1      0.0.0.0         UG    0      0        0 eth0

wlan0 has static ip 172.26.0.3 and eth0 has static ip 172.26.0.2

172.26.0.1 is the router (what has internet connectivity). I just want 
to have local network connections between all other devices and my nslu2.


Thanks in advance,
Xan.