Lustre discuss - Apr 2009 - When is IPoIB Needed?

Hi,

When running a Lustre over IB configuration, when is IPoIB needed?  Just
when the system first mounts?  Or, is it needed periodically thereafter,
e.g. for pings?

Thanks.

 

Roger Spellman

Staff Engineer

Terascala, Inc.

508-588-1501

www.terascala.com http://www.terascala.com/

 

 

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On Apr 20, 2009  15:10 -0400, Roger Spellman wrote:
> When running a Lustre over IB configuration, when is IPoIB needed?  Just
> when the system first mounts?  Or, is it needed periodically thereafter,
> e.g. for pings?
My not-LNET-expert understanding is that IPoIB is only really needed for
addressing of the client nodes, to avoid depending on esoteric IB MAC
addresses (that may change with h/w repairs) for identifying clients
and servers.  While the IP address is used to locate the node at mount
time, the entire communication is done with native IB protocol.

Cheers, Andreas
--
Andreas Dilger
Sr. Staff Engineer, Lustre Group
Sun Microsystems of Canada, Inc.