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Subject: Re: [OMPI users] Two remote machines - asymmetric behavior
From: David Doria (daviddoria+openmpi_at_[hidden])
Date: 2009-08-05 09:29:13


On Mon, Aug 3, 2009 at 1:41 PM, Ralph Castain <rhc_at_[hidden]> wrote:

> The only thing that changes is the required connectivity. It sounds to me
> like you may have a firewall issue here, where cloud3 is blocking
> connectivity from cloud6, but cloud6 is allowing connectivity from cloud3.
>
> Is there a firewall in operation, per chance?
>
> Ralph
>

I have turned off all firewalls. This is the wireshark log of the traffic on
one of the machines in the case that does not work:
http://rpi.edu/~doriad/cloud3_cloud3+6.wsk

I see a bunch of red lines, where in any of the working tests cases I do not
see any red lines. As you can tell from my analysis, I am an expert
wireshark user (haha!) - can anyone interpret the problem from this file?
Maybe I need to ask the wireshark mailing list for an analysis?

Thanks,

David