netdev - Re:

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Message-ID: <OF056C7E7C.A9A5EFC7-ON882577AB.006E6B89-882577AB.006F2C1E@us.ibm.com>
Date:	Mon, 27 Sep 2010 13:14:11 -0700
From:	David Stevens <dlstevens@...ibm.com>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:	Christoph Lameter <cl@...ux.com>, linux-rdma@...r.kernel.org,
	netdev@...r.kernel.org, netdev-owner@...r.kernel.org,
	Bob Arendt <rda@...con.com>
Subject: Re: 

Jason Gunthorpe <jgunthorpe@...idianresearch.com> wrote on 09/27/2010 
01:05:00 PM:

> On Mon, Sep 27, 2010 at 12:32:45PM -0700, David Stevens wrote:
> 
> > You can, of course, add a querier (or configure it, assuming an
> > attached switch supports it) and set the query interval and
> > robustness count as appropriate for that network.
> 
> Presumably the IPoIB multicast router should already be the querier..
> How does this help handling joins to new groups?

        Because a querier can set the robustness value and
query interval to anything you want. In the original report,
he's not running a querier. The fact that it's a new group
doesn't matter -- these are per-interface.

                                                        +-DLS

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