netdev - Re: [PATCH 1/3 v4] ipv6: do not disable temp_address when reaching max

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Message-ID: <20130816110738.GC2112@order.stressinduktion.org>
Date:	Fri, 16 Aug 2013 13:07:38 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Ding Tianhong <dingtianhong@...wei.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	Jon Maloy <jon.maloy@...csson.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Netdev <netdev@...r.kernel.org>, kargig@...d.gr,
	ppandit@...hat.com
Subject: Re: [PATCH 1/3 v4] ipv6: do not disable temp_address when reaching max_address

On Fri, Aug 16, 2013 at 08:48:44AM +0800, Ding Tianhong wrote:
> On 2013/8/16 3:07, Hannes Frederic Sowa wrote:
> > On Thu, Aug 15, 2013 at 07:36:03PM +0200, Hannes Frederic Sowa wrote:
> >> Now we have to check why these addresses don't go out of tentative state.
> > 
> > Just looked at it. flood_router26 just emits pretty high values for
> > RetransTime:
> > 
> > 21:05:52.050159 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 192) fe80::c:2a47:1360:1101 > ff02::1: [icmp6 sum ok] ICMP6, router advertisement, length 192
> >         hop limit 255, Flags [none], pref high, router lifetime 65535s, reachable time 16384000ms, retrans time 1966080ms
> >           mtu option (5), length 8 (1):  1500
> >             0x0000:  0000 0000 05dc
> > 
> > We are completly in spec here. Just DAD needs a lot of time to finish.
> > 
> > Greetings,
> > 
> >   Hannes
> > 
> > 
> Great job, more and more close to the truth, let's find a better way to finish it. 

Thanks! :)

I just sent out a patch with the removal of the max_addresses
check. Please have a look!

I tested it with flood_router26 and modified it to also change the
retrans_time, because it affects in which interval addresses get
regenerated. We always were on the safe side.

Greetings,

  Hannes

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