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

Vallard Benincosa vallard at benincosa.com
Wed Dec 2 10:59:09 PST 2009


Spanning Trees are usually the biggest culprit in pxe booting and switch
problems.  For SMC switches I think you just need to do something like:

telnet smc
enable
config
interface ethernet 1/1  # if this is the interface your client node is on
spanning-tree edge-port
exit
copy run start


On Wed, Dec 2, 2009 at 10:36 AM, Hearns, John <john.hearns at mclaren.com>wrote:

>
> I've tried resetting the SMC switch to factory defaults (with
> auto-negotiate on).  I've checked the /etc/beowulf/modprobe.conf and it
> doesn't seem to be demanding anything exotic.  We've tried swapping out
> to another SMC switch but that didn't change anything.
>
> No idea really, as I don't use SMC switches.
> First thing I would do would be to get a laptop with Linux on, and
> attach it to the SMC switch.
> Configure the Ethernet interface to use DHCP, then ifconfig it down then
> ifcoinfig it up.
> Run tcpdump eth0 as you do this, and tail -f /var/log/messages
>
>
> If it gets a DHCP address (and of course on the cluster head node there
> is a pool of free DHCP addresses configured)
> the test tftp file transfer. Set the tftp daemon on the head node to run
> in debug mode, and start it up.
> Try a tftp get of a test file on the laptop.
>
>
> The contents of this email are confidential and for the exclusive use of
> the intended recipient.  If you receive this email in error you should not
> copy it, retransmit it, use it or disclose its contents but should return it
> to the sender immediately and delete your copy.
>
>
> _______________________________________________
> Beowulf mailing list, Beowulf at beowulf.org sponsored by Penguin Computing
> To change your subscription (digest mode or unsubscribe) visit
> http://www.beowulf.org/mailman/listinfo/beowulf
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.beowulf.org/pipermail/beowulf/attachments/20091202/c5cb3192/attachment.html>


More information about the Beowulf mailing list