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Subject: Re: [OMPI users] MPI over tcp
From: Don Armstrong (don_at_[hidden])
Date: 2012-05-04 18:43:20

On Fri, 04 May 2012, Don Armstrong wrote:
> On Fri, 04 May 2012, TERRY DONTJE wrote:
> > Sorry if this is a stupid question but what is eth0:1 (it's under
> > eth0). Are the 172.16.30.X addresses pingable to each other?
> Yes. They're all on the same physical subnet.

Even though this might have seemed like a stupid question, it put me
onto the right track. Apparently, mca_btl_tcp_endpoint_accept (or
similar) is unable to handle multiple IP addresses on the same
interface, and rejects the connection.

Changing the network topology to only have one address on each
physical network adapter resolves the problem, and connections are
made properly.

Don Armstrong

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