It was a typo in my last post, I did use "--mca btl_tcp_if_exclude virbr0" and it did not work.

At 2012-09-25 21:10:24,"Jeff Squyres" <jsquyres@cisco.com> wrote:

>On Sep 25, 2012, at 2:56 PM, Richard wrote:
>
>> thanks a lot ! 
>>  using "--mca btl_if_exclude virbr0" does not work, but you have pointed out the
>
>Ya, sorry -- see my second mail, it should be "btl_tcp_if_exclude".
>
>> problem, so i fixed it using "--mca btl_tcp_if_include bond0" because I know this is the high speed network interface I should use on each node.
>
>Glad it works for you!
>
>If you're not using those interfaces (they might be related to Xen, or something like that?), you might want to disable them.
>
>-- 
>Jeff Squyres
>jsquyres@cisco.com
>For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
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