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Subject: Re: [OMPI users] Problem with gateway between 2 hosts
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-07-03 08:36:06


Check out this FAQ entry:

     http://www.open-mpi.org/faq/?category=tcp#tcp-routability

We've long-since talked about adding an MCA param to tell Open MPI
"just assume all TCP addresses are reachable from each other" for
cases similar to yours, but it unfortunately hasn't happened yet. :-(

On Jul 3, 2008, at 3:05 AM, Geoffroy Pignot wrote:

> Hi,
> To answer your question 172.x.y.z are not behind a NAT .
> Moreover, I check the netstat command on the remote host and it
> seems like the connection is ok
>
> tcp 0 0 10.160.x.x:39794 172.x.y.z:
> 50858 ESTABLISHED 20956/orted
> unix 3 [ ] STREAM CONNECTED 76348311 20956/orted
> unix 3 [ ] STREAM CONNECTED 76348310 20956/orted
>
> I hope it'll help
> Does anyone run openmpi program in such environment ???
> Thanks again
>
> Geoffroy
>
>
>
>
> 2008/7/2 Geoffroy Pignot <geopignot_at_[hidden]>:
> are the 172.x.y.z nodes behind a NAT (hence the communication back
> isn't possible - only the stdout from the rsh/ssh is working in this
> case)?
>
> -- Reuti
>
> Actually I dont know exactly , I am asking extra informations to
> my network architect
> Interesting thing to notice is that LAM worked in such kind of
> network configuration.
> I keep you inform as soon as I have more infos.
>
>
> Regards
> Geoffroy
>
>
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-- 
Jeff Squyres
Cisco Systems