netdev - Re: [PATCH] bonding: send IPv6 neighbor advertisement on failover

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Date:	Wed, 08 Oct 2008 15:22:38 -0700
From:	Sridhar Samudrala <sri@...ibm.com>
To:	Brian Haley <brian.haley@...com>
Cc:	David Stevens <dlstevens@...ibm.com>,
	Alex Sidorenko <alexandre.sidorenko@...com>,
	David Miller <davem@...emloft.net>, fubar@...ux.vnet.ibm.com,
	Simon Horman <horms@...ge.net.au>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	netdev-owner@...r.kernel.org,
	Vladislav Yasevich <vladislav.yasevich@...com>
Subject: Re: [PATCH] bonding: send IPv6 neighbor advertisement on failover


On Wed, 2008-10-08 at 15:01 -0400, Brian Haley wrote:
> David Stevens wrote:
> > Well, actually, it looks like I'm suggesting you to re-use something that 
> > doesn't
> > exist. :-)
> > 
> > MLD (and IGMP) has such a thing where unsolicited advertisements are sent
> > multiple times, with delays in between, to account for lossy networks 
> > possibly
> > dropping the first one. There are configurable counts associated with 
> > probes
> > and retransmit intervals for solicits, but I don't see the equivalent yet 
> > for
> > unsolicited NA's.
> 
> I don't see an equivalent either, since the only unsolicited NA the 
> kernel sends is for DAD, which uses dad_transmits.

Doesn't DAD use neighbor solicitation rather than unsolicited NA?
Can we use NS in the bonding failover scenario too?

Thanks
Sridhar




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