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Date:	Fri, 30 Nov 2007 23:02:19 +1100
From:	Herbert Xu <>
To:	Evgeniy Polyakov <>
Cc:	Andrew Morton <>,,,,
	YOSHIFUJI Hideaki <>
Subject: Re: [Bugme-new] [Bug 9440] New: Problem in joinning a socket to ipv6 multicast address in specific scenario

On Wed, Nov 28, 2007 at 02:18:14PM +0300, Evgeniy Polyakov wrote:
> Hi.
> Avaid provided test application, so bug got fixed.
> IPv6 addrconf removes ipv6 inner device from netdev each time cmu
> changes and new value is less than IPV6_MIN_MTU (1280 bytes).
> When mtu is changed and new value is greater than IPV6_MIN_MTU,
> it does not add ipv6 addresses and inner device bac.
> This patch fixes that.
> Tested with Avaid's application, which works ok now.
> Signed-off-by: Evgeniy Polyakov <>

OK, this looks like a good change.  However, we should also
change NETDEV_UP as well to recreate idev if it isn't there
and the MTU is big enough.

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