CURRENT: net/igb broken

[O. Hartmann]

Running CURRENT as of today (r287817), it seems that the network system of
CURRENT is corrupted. The machine in question is a Fujitsu server Primergy RX
1330 with two Intel "igb" devices (igb0 and igb1).

the network is now on both devices unreachable. With or without IPFW
(disabling, having first rule to allow everything in/out) doesn't matter.
Nothing get to or from that box on any device.

With FreeBSD 11.0-CURRENT #4 r287592: Wed Sep  9 09:09:23 CEST 2015  amd64 I
had no problems.

Any ideas?

Thanks in advance,

Oliver