[175166] in North American Network Operators' Group
Re: IPv6 Default Allocation - What size allocation are you giving out
daemon@ATHENA.MIT.EDU (Roland Dobbins)
Thu Oct 9 18:37:41 2014
X-Original-To: nanog@nanog.org
From: Roland Dobbins <rdobbins@arbor.net>
In-Reply-To: <CAPkb-7Dexwmdyv8-rOYzt7Rjz5MjugmFGtLMKfPu7J_haZ044w@mail.gmail.com>
Date: Fri, 10 Oct 2014 05:37:27 +0700
To: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Oct 10, 2014, at 5:04 AM, Baldur Norddahl <baldur.norddahl@gmail.com> =
wrote:
> NONE of the problems listed in RFC 6752 are a problem with using =
unnumbered interfaces.
As far as Section 8 goes, you're even worse off than if you were using =
private IP addresses.
And see Section 9.
My point is that *analogous* issues arise with unnumbered interfaces. =
Loopback-only addressing isn't sufficient for troubleshooting purposes =
and other routine operational activities.
> The thing is that we will only use ONE public address for a router. =
And the router will be using that address for traceroute, ICMP et al. =
And therefore
> RFC 6752 does not apply.
Again, see Section 9. *Analogous* issues arise in networks with =
unnumbered interfaces. I'm aware that PMTU-D will work with the setup =
you propose.
You might want to take a look at Appendix A, too.
It sounds as if there is an unfortunate shortfall in the budget for your =
organization. Personally, I wouldn't attempt to build and operate a =
network which required more funding than was made available in order to =
implement it optimally.
Doing things the suboptimal way in IPv4 isn't a valid reason replicate =
those suboptimalities in IPv6.
I wish you luck in troubleshooting an infrastructure full of unnumbered =
links - I've done it, and it isn't fun.
> What I am mostly getting from the responses here are not much useful, =
other than a lot of people screaming he his doing something different so =
he must be an idiot
That is incorrect. You've been told repeatedly that troubleshooting =
unnumbered links is highly suboptimal; you've merely dismissed those =
arguments for reasons best known to yourself.
----------------------------------------------------------------------
Roland Dobbins <rdobbins@arbor.net> // <http://www.arbornetworks.com>
Equo ne credite, Teucri.
-- Laoco=F6n
