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Subject: Re: [OMPI users] Set GID
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-03-11 23:31:34

It's a function of the subnet manager; I don't know offhand how to set
it with OpenSM. I can tell you how to set it on the Cisco SM if
that's what you're using (it's also in the Cisco SM docs).

On Mar 11, 2008, at 5:04 PM, Jon Mason wrote:

> I am getting the following error when I try to run OMPI over my dual
> port IB adapter:
> --------------------------------------------------------------------------
> WARNING: There are more than one active ports on host 'vic20', but the
> default subnet GID prefix was detected on more than one of these
> ports. If these ports are connected to different physical IB
> networks, this configuration will fail in Open MPI. This version of
> Open MPI requires that every physically separate IB subnet that is
> used between connected MPI processes must have different subnet ID
> values.
> Please see this FAQ entry for more details:
> NOTE: You can turn off this warning by setting the MCA parameter
> btl_openib_warn_default_gid_prefix to 0.
> --------------------------------------------------------------------------
> I understand why it is doing the above based on the description in the
> link above, but I cannot seem to find anywhere that will tell me how
> to
> change the GID to something else.
> Thanks,
> Jon
> _______________________________________________
> users mailing list
> users_at_[hidden]

Jeff Squyres
Cisco Systems