BBB 3.18.0 kernel lockups

Hi,

3.18.0 kernel locks up my BBB after a few seconds of maxing out the
Ethernet connection - unfortunately, there is no output on the serial
console. Kernel 3.17.1 on the other hand is fine. Anyone else seeing
this or having an idea what could have caused this in 3.18?

Christof

I have been using 3.18.0 without issue for the last few days. I am using
the default config.

Dave.