A MTU of 400 is illegal, IPv4 requires a minimum MTU of 576 bytes. Below
it linux uses the minimum MTU and turns off path mtu discovery (=
drops DF)
You can change that minimum mtu by changing the ip_rt_min_pmtu variable
(no sysctl, you have to change it in /dev/kmem or recompile)
-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/