North American Network Operators Group

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Re: IPv6 daydreams

  • From: Peter Dambier
  • Date: Mon Oct 17 06:23:39 2005

Mohacsi Janos wrote:

On Mon, 17 Oct 2005, Peter Dambier wrote:

From an end-user:

I dont know what I should need an /64 for but it's barf, barf anyhow.

My routing table is telling me I have got a /124 only:

The tunnel (network) *::0
The end of the tunnel *::1
Me *::2
The tunnel broadcast *::3
What? Broadcast?
Well, it is singlecast :)

ping *::3 and 1 answers.

ping *::1 ok 1 answers.

ping *::2 nobody answers - that is my configuration problem.

ping *::0 nobody answers

Right now I have the impression we are only enusers.
Right now I have the impression we are all connected to the same
university PC running BSD something.

Ok, today I have some NATted stuff that would be fond of its own
ip. Kicking my NAT-box out I could grow my hair again. No more
worring who needs what port and why.


Who is printing all those bank listings on my new printer. It
was a wholesale networkprinter. Just plug it into the power
and print. Must have been stolen from the bank of china because
it is all chines companies.

And why is that van with the ice cream waiting in front of my
neighour? It is me who ordered the icream. They have thrown
out their freecer. I dont know why. It was working perfectly.
I had no problems connecting it to my wlan and ordering. They
did not even care about my bank account beeing empty. They told
me I had enough credit to by their company.

Sorry I have to stop now. Some policemen want to talk with me
about a major fraud done with my IPv6 tunnel.

See you later :)

Janos Mohacsi
Network Engineer, Research Associate
Key 00F9AF98: 8645 1312 D249 471B DBAE  21A2 9F52 0D1F 00F9 AF98

Jeroen Massar wrote:

On Mon, 2005-10-17 at 02:52 +0000, Christopher L. Morrow wrote:

On Sat, 15 Oct 2005, Tony Li wrote:

Hopefully, that will reach a point where the operators show up and
participate at IETF, rather than the IETF coming to NANOG.


Full ack. Ops should really realize that they can have a lot of
influence in the processes and what is actually being standardized.
Which really helps the ops a lot as they then have an extra foot in
the door at the Vendors, as the IETF is also known as the IVTF as some
people like to call it :)

On Mon, 2005-10-17 at 09:15 +0530, Suresh Ramasubramanian wrote:

On 17/10/05, David Barak <[email protected]> wrote:

I'd change the allocation approach: rather than give
every customer a /64, which represents an IPv4
universe full of IPv4 universes, I'd think that any
customer can make do with a single IPv4-size universe,
and make the default end-customer allocation a /96.
I personally am in favor of reducing minimum allocations like this -
and as was discussed quite extensively in the "botnet of toasters and
microwave ovens when you ipv6 enable the lot" thread a few weeks back,
it usually ends up that there's just one host in a /48 or /64 so that
the sparsely populated v6 address space means bots cant go scanning IP
space for vulnerable hosts like they do in v4

There is a current document out for trying to get this stepped back to
a /56 for _enduser_ sites. Corporate / Organisational / Business sites
should then still get a /48.

HD ratio docs:

Endsite definition:

As a note, out of my IPv6 /48, at home, I only use one /64 as I bridged
the wireless and wired networks. This was easier than having Samba do
remote announces to the other /64 and also allows me to re-attach my
laptop and plug it into the wired without it changing the IP, very cheap
'mobility' :) A /56 for 'home usage', thus having 2^8 = 256 /64's or
subnets would IMHO (force me to drink beer when this ever turns out to
be wrong :) be enough for most home usages. I really don't see people
installing 200+ routed networks in a home. Most people don't even have
more than 4 rooms and one /64 already contains 2^64 addresses, unless we
go for the IP-per-carpet-fiber approach, just give the carpet in your
house a single /64 and you still have 255 subnets to go...

It also means that when Vint Cerf's research about extending the
internet into outer space comes through (or when we finally start
exchanging email, http or whatever traffic with aliens), there's
sooner or later going to be an intergalactic assembly of some sort
where delegations from Betelgeuse and Magrathea will complain about
how those @^$^$#^$^ earthlings hogged all the v6 space thinking
there's more than enough v6 IP space to allot a /48 to every single
molecule on earth, so now they're not getting enough IP space to
network a group of computers that'll plot the answer to life, the
universe and everything.

They don't need to, this computer is already there, it is Earth.....
there just ain't no plotter installed and we will be destroyed for that
superhighway and then re-built as Earth 2, but we won't notice that :)

Well, I know that sounds silly, but people were handing out class A, B
and C space for years thinking nobody at all would run out of v4
space, there's lots of it so why not just parcel it out with open

The Huitema-Durand / Host-Density (HD) ratio RFC3194 it explains quite a
number of these issues and covers most of them.

Next to that note that 2000::/3 is only 1/8th of the total IPv6 address
space. If we peep up, we can do that 8 times before the address space is
full and I am quite sure if 2000::/3 runs out that people will start
having some really loud discussions. Indeed 2000::/3 would then be
similar to 'class A' space...

Back to operations - there was this interesting proposal - well, two
proposals as it turned out - at apnic 20 -

Similar to the one done above in the RIPE region :)


Peter and Karin Dambier
Graeffstrasse 14
D-64646 Heppenheim
+49-6252-671788 (Telekom)
+49-179-108-3978 (O2 Genion)
+49-6252-750308 (VoIP:
mail: [email protected]
mail: [email protected]

Peter and Karin Dambier
Graeffstrasse 14
D-64646 Heppenheim
+49-6252-671788 (Telekom)
+49-179-108-3978 (O2 Genion)
+49-6252-750308 (VoIP:
mail: [email protected]
mail: [email protected]