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<div class="gmail_quote">On Fri, Jul 31, 2009 at 12:13 PM, Yossi Etigin <span dir="ltr"><<a href="mailto:yosefe@voltaire.com" target="_blank">yosefe@voltaire.com</a>></span> wrote:<br>
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<div>On 29/07/09 19:35, Hal Rosenstock wrote:<br>><br>><br>> On Wed, Jul 29, 2009 at 10:22 AM, Moni Shoua <<a href="mailto:monis@voltaire.com" target="_blank">monis@voltaire.com</a><br></div>
<div>> <mailto:<a href="mailto:monis@voltaire.com" target="_blank">monis@voltaire.com</a>>> wrote:<br>><br>> Hal Rosenstock wrote:<br>> ><br>> ><br>> > On Wed, Jul 29, 2009 at 8:16 AM, Moni Shoua <<a href="mailto:monis@voltaire.com" target="_blank">monis@voltaire.com</a><br>
> <mailto:<a href="mailto:monis@voltaire.com" target="_blank">monis@voltaire.com</a>><br></div>
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<div>> > <mailto:<a href="mailto:monis@voltaire.com" target="_blank">monis@voltaire.com</a> <mailto:<a href="mailto:monis@voltaire.com" target="_blank">monis@voltaire.com</a>>>> wrote:<br>> ><br>
> ><br>> > > > Is the LMC in the above from the local port ?<br>> Unfortunately, LMC<br>> > > is not<br>> > > > required to be uniform across the subnet so the remote<br>
> > port's LMC may<br>> > > > not be the same as that on the local port.<br>> > ><br>> > > opensm configures the same LMC to all endports (CA) in the<br>
> > fabric so<br>> > > in which case do you suspect that<br>> > > it will be different?<br>> > ><br>> > ><br>> > > I wasn't talking about the simplification that OpenSM uses<br>
> but rather<br>> > > what IBA allows. There may be other SMs which do this or OpenSM<br>> > could be<br>> > > extended (with additional configuration for this).<br>> > ><br>
> > > -- Hal<br>> ><br>> > So I guess a possible solutions for that is to query each<br>> suspected<br>> > node before making a decision to flush it.<br>> > When getting the node info response the true LMC can be put in the<br>
> > LID check function.<br>> ><br>> ><br>> > I'm not following how you are saying to determine the true LMC (of the<br>> > remote port).<br>> ><br>> Send PortInfo query for that port<br>
><br>><br>> from the IPoIB client ? I think this ends up needing to contact the SA<br>> to get this info rather than the port directly. Isn't that what you were<br>> trying to avoid originally ? If that's the case, one way would've been<br>
> if ARPs carried the LMC as well as the LID.<br>><br><br></div></div>What if we query the remote port LMC once, when the path is resolved, and then<br>use it to mask the LID until the path is refreshed again?</blockquote>
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<div>Just like the LID, remote LMC could change.</div></div><br>