If you are trying to use OMPI as the base for ORCM, then you can tell ORCM to use OMPI's "tcp" multicast module - it fakes multicast using pt-2-pt tcp messaging.
I'm still not sure what you're asking -- are you asking how to get Open MPI to work if multicast is disabled in your network?
If so, not to worry; Open MPI doesn't currently use multicast.
On Feb 24, 2011, at 6:39 AM, Vasiliy G Tolstov wrote:
> On Thu, 2011-02-24 at 06:32 -0500, Jeff Squyres (jsquyres) wrote:
>> I'm not sure what you're asking. Open MPI should work just fine in a Xen environment.
>> If you're unsure about how to use the MPI API, you might want to take a tutorial to get you familiar with MPI concepts, etc. Google around; there are a bunch available. My personal favorite is at the UIUC NCSA web site; if you sign up for a free account, they have a beginners and intermediate MPI tutorials available.
>> Sent from my PDA. No type good.
>> On Feb 24, 2011, at 4:37 AM, "Vasiliy G Tolstov" <firstname.lastname@example.org> wrote:
> This is not xen specific problem. but routing specific. Admins deny
> multicast packets.
> Vasiliy G Tolstov <email@example.com>
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