[Beowulf] Re: cluster fails to boot with managed switch, but5-port switch works OK

Rahul Nabar rpnabar at gmail.com
Wed Dec 2 13:42:04 PST 2009

On Wed, Dec 2, 2009 at 1:48 PM, Michael Will <mwill at penguincomputing.com> wrote:
> I don't know anything about smc switches, but for cisco switches I had to enable 'spanning-tree portfast default' before to allow a >pxe booting node to stay up. Maybe the smc switch has something similar that prevents the port from being fully useable until some >spanning tree algorithm terminates?

+1 for the spanning tree suggestion. I needed to do the same on my
Dell Catalyst.

Check if "DHCP squash" on the port connected to the master node is
enabled. This can prevent DHCP. Just a thought.


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