Re: autofs reverts to IPv4 for multi-homed IPv6 server ?

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Hello,
I should add http://biplane.com.au/blog/?p=122 for the easy read on 
destination address selection (/etc/gai.conf).

Quite a machinery if the application chooses to use it.

Best Regards

Christof

On Thu, Apr 28, 2016 at 01:26:48PM +0200, Christof Koehler wrote:
> Hello,
> 
> On Thu, Apr 28, 2016 at 06:50:58PM +0800, Ian Kent wrote:
> > On Thu, 2016-04-28 at 11:10 +0200, Christof Koehler wrote:
> > 
> > Sounds like I'll need to actually have a look at that RFC before doing
> > anything, ;)
> These might be nicer reads:
> http://biplane.com.au/blog/?p=22
> http://biplane.com.au/blog/?p=30
> 
> Please note that the actual "ip addrlabel" output on a pristine 16.04
> is 
> prefix ::1/128 label 0 
> prefix ::/96 label 3 
> prefix ::ffff:0.0.0.0/96 label 4 
> prefix 2001::/32 label 6 
> prefix 2001:10::/28 label 7 
> prefix 3ffe::/16 label 12 
> prefix 2002::/16 label 2 
> prefix fec0::/10 label 11 
> prefix fc00::/7 label 5 
> prefix ::/0 label 1
> so that catches ULAs in the fc00::/7 already with a label separating
> them. I additional add
> prefix 2001:638:708:1261:2000::/96 label 99 
> prefix 2001:638:708:1261:1000::/96 label 99
> but that should not matter.
> 
> > > However, ping times (response times) on ethernet effectively show
> > > random variations, sometimes in the millisecond range.
> > 
> > True but the worst case is you end up with a trivial load balancing
> > effect.
> 
> If addresses are equivalent that is a desirable effect. My goal however
> was to distinguish between GUA and ULA relying on the RFC for selection
> to avoid headaches. I will have to rethink this for sure.
> 
> > Say, for example, you had multiple distinct interfaces on a machine to
> > increase available throughput (believe it or not I've seen it done) then
> > this sort of load balancing could be beneficial.
> 
> Yes, been there, done that; but I would consider that something no longer needed 
> in this enlightened age:
> https://help.ubuntu.com/community/UbuntuBonding#Descriptions_of_bonding_modes
> Especially Mode 4. But I think you know them :-)
> 
> 
> > 
> > Mmm .. you should be able to put addresses in the map.
> I will try again to make sure.
> 
> > 
> > The ppa is done, to the extent that I wanted too, so check it out.
> > Have a look at https://launchpad.net/~raven-au.
> > 
> Thank you, I will try and report back.
> 
> 
> Best Regards
> 
> Christof
> 
> -- 
> Dr. rer. nat. Christof Köhler       email: c.koehler@xxxxxxxxxxxxxxxxxxx
> Universitaet Bremen/ BCCMS          phone:  +49-(0)421-218-62334
> Am Fallturm 1/ TAB/ Raum 3.12       fax: +49-(0)421-218-62770
> 28359 Bremen  
> 
> PGP: http://www.bccms.uni-bremen.de/cms/people/c_koehler/
> --
> To unsubscribe from this list: send the line "unsubscribe autofs" in

-- 
Dr. rer. nat. Christof Köhler       email: c.koehler@xxxxxxxxxxxxxxxxxxx
Universitaet Bremen/ BCCMS          phone:  +49-(0)421-218-62334
Am Fallturm 1/ TAB/ Raum 3.12       fax: +49-(0)421-218-62770
28359 Bremen  

PGP: http://www.bccms.uni-bremen.de/cms/people/c_koehler/
--
To unsubscribe from this list: send the line "unsubscribe autofs" in



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