[Beowulf] Re: cluster fails to boot with managed switch, but 5-port switch works OK

Rahul Nabar rpnabar at gmail.com
Thu Dec 3 15:08:39 PST 2009

On Thu, Dec 3, 2009 at 2:17 PM, Greg Keller <Greg at keller.net> wrote:

> This is very common with Spanning tree enabled.  Essentially, once the port
> has a physical link light it may take a while before spanning tree allows
> traffic to actually flow through the port.

I've had to do this same thing that Greg describes with my Dell power
connect (port fast and spanning tree disable) but on a more
fundamental level:

Why is the long delay with spanning tree? And is it possible to (a)
reduce this delay (b) Increase the timeout for PXE / DHCP?


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