[Soekris] impossible to link eth1, eth2, eth3 but eth0 is well working

[RB]

On Fri, Dec 5, 2008 at 09:53, Michael Sierchio <kudzu at tenebras.com> wrote:
> This is a basic network naivete problem, not a hardware problem.

To expound, you generally cannot have multiple ethernet interfaces on
the same subnet.  There are ways around it (bonding, multipath, etc.),
but given two equally precise routes, the standard default is to
choose the first one.  Given your routing table below, all traffic
destined for the 192.168.10.0/24 subnet will exit through eth0.
Traffic to the addresses on eth1-3 will appear to return from the eth0
address.

192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0 eth1
192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0 eth2
192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0 eth3
127.0.0.0       0.0.0.0         255.0.0.0       U     0      0        0 lo
0.0.0.0         192.168.10.9    0.0.0.0         UG    0      0        0 eth0