[LEDE-DEV] Routing two interfaces on same subnet

[Baptiste Clenet]

Hi,

On my board, I've got a wifi and an ethernet interfaces on the same
subnet (192.168.0.0/24). Problem is if ethernet cable is unplugged I
can't use wifi anymore, see

root at eisox:/# ip route
default via 192.168.0.50 dev eth0  proto static
192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.85
192.168.0.0/24 dev apcli0  proto kernel  scope link  src 192.168.0.80
Here, ethernet is unplugged and wifi connected to other router so I
can't use the wifi (ping failed in both direction).

If I delete eth route, it works.
root at eisox:/# ip route del 192.168.0.0/24 dev eth0
root at eisox:/# ip route
default via 192.168.0.50 dev eth0  proto static
192.168.0.0/24 dev apcli0  proto kernel  scope link  src 192.168.0.80
root at eisox:/#

How can I can solve the problem?
I won't know the status of Wifi and Ethernet so I would like that both
can work if they are plugged.

Or how to disable one interface is the other one is connected (like if
ethernet is plugged, allow only ethernet to work, if it is unplugged,
allow only wifi)

Cheers,

-- 
Baptiste