***SPAM*** RE: [ofa-general] Is IBIS only for querying OpenSM?

[terry watson]

Thanks for the response. The environment I am testing has two clusters and one switch, with the subnet manager running from the switch. Half the nodes are in one partition and half in the other (ignoring 0xffff), call them partitions A and B. I have access to one node in partition A as root and would like to be able to reconfigure that node locally, and with no access to the switch subnet manager configuration, to be able to access nodes in partition B.

After some reading I believe that IBIS from IBUtils should allow me to alter the local p_key table and therefore allow me to access nodes on partition B. I cannot test this until I am on-site and I am formulating a strategy before arrival. If it does not work this way it would be useful to know in advance. MPI is used rather than IPoIB. 

If my approach is flawed I would appreciate it if someone could point this out.

________________________________
> Date: Fri, 18 Apr 2008 09:35:42 +0200
> From: philippe.gregoire at cea.fr
> To: terrywatson at live.com
> CC: general at lists.openfabrics.org
> Subject: Re: [ofa-general] Is IBIS only for querying OpenSM?
> 
> terry watson a écrit :
> 
> Hi all,
> 
> I will be performing some testing of partitioning used as a security control. Am I right in believing that IBIS will be able to set partition table values of the local compute node I am logged on to, even though they are not using OpenSM, but rather a SM on a switch? Could I then attempt to access a partition that I was originally excluded from accessing?
> 
> I am new to Infiniband technology and would also appreciate a response from an expert who has views on the strength of the security that partitioning provides in separating two clusters that should have no interaction whatsoever.
> 
> Thanks,
> Dave
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