[ofa-general] Re: OpenSM and fat tree

[Yevgeny Kliteynik]

Hal Rosenstock wrote:
> Hi Yevgeny,
> 
> Is it possible that OpenSM's fat tree routing somehow depends on the
> LIDs previously assigned ?

It depends only on the existence of the LIDs.

> It seems that for a legitimate fat tree topology, the topology sometimes
> won't come up as a fat tree if reassigning LIDs (-r) is not used.

That's odd...

> In addition to -r making fat tree work, certain routing algorithms seem
> to also clear this out (without using -r). For example, if lash were run
> and then ftree, it seems to work without doing the -r. (Haven't yet
> tried updn).
> 
> Any ideas on this ? Should a bug be filed on this ? Thanks.

No ideas whatsoever. Please file a bug on this.
It would be nice if I could reproduce it in simulation.

-- Yevgeny

> -- Hal
> 
> 
>