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

[Christof Koehler <christof.koehler@bccms.uni-bremen.de>]

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

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Dr. rer. nat. Christof Köhler       email: c.koehler@bccms.uni-bremen.de
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