[Beowulf] Timeout on eth0 when booting disk less

Johannes Brechtmann johannes.brechtmann at stud.ifi.lmu.de
Sun Mar 12 09:54:50 PDT 2017

I had the same issue on nodes with multiple NICs. The solution was to set
ksdevice=bootif. See here for more explanation:


On Sun, 12 Mar 2017 11:01:40 +0100
Jon Tegner <tegner at renget.se> wrote:

> Hi,
> I'm booting some nodes disk less, using root file system on NFS. The 
> first phase (PXE, tftp etc) works without problems. The second phase, 
> when the system is actually supposed to boot over NFS the machine hangs 
> about every second time - and it seems to be a result of the relevant 
> nic (eth0) not negotiating its properties before some kind of timeout 
> kicks in. Obviously resulting in a failure to boot the NFS file system. 
> If I reboot the node it eventually works.
> This could possibly be a problem with the switch, but one remedy would 
> seem to be to extend the time before the timeout kicks in (it seems to 
> be a few seconds at the moment). Any hints on how to achieve this?
> Thanks,
> /jon
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