[131653] in North American Network Operators' Group
Re: Failover IPv6 with multiple PA prefixes (Was: IPv6 fc00::/7 -
daemon@ATHENA.MIT.EDU (Christopher Morrow)
Sun Oct 31 21:32:44 2010
In-Reply-To: <BE727A2A-83AD-41D2-BDC3-BD75ACEE6D89@virtualized.org>
Date: Sun, 31 Oct 2010 21:32:39 -0400
From: Christopher Morrow <morrowc.lists@gmail.com>
To: David Conrad <drc@virtualized.org>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Sun, Oct 31, 2010 at 3:10 PM, David Conrad <drc@virtualized.org> wrote:
> On Oct 31, 2010, at 6:45 AM, Christopher Morrow wrote:
>>>> "If Woody had gone straight to a ULA prefix, this would never have happened..."
>>> Or better yet, if Woody had gone straight to PI, he wouldn't have this problem, either.
>> ula really never should an option... except for a short lived lab, nothing permanent.
>
> Seems to me the options are:
>
> 1) PI, resulting in no renumbering costs, but RIR costs and routing table bloat
> 2) PA w/o ULA, resulting in full site renumbering cost, no routing table bloat
> 3) PA w/ ULA, resulting in externally visible-only renumbering cost, no routing table bloat
>
> Folks appear to have voted with their feet that (2) isn't really viable -- they got that particular T-shirt with IPv4 and have been uniformly against getting the IPv6 version, at last as far as I can tell.
>
> My impression (which may be wrong) is that with respect to (1), a) most folks can't justify a PI request to the RIR, b) most folks don't want to deal with the RIR administrative hassle, c) most ISPs would prefer to not have to replace their routers.
>
> That would seem to leave (3).
>
> Am I missing an option?
I don't think so, though I'd add 2 bits to your 1 and 3 options:
1) we ought to make getting PI easy, easy enough that the other
options just don't make sense.
2) ULA brings with it (as do any options that include multiple
addresses) host-stack complexity and address-selection issues... 'do I
use ULA here or GUA when talking to the remote host?'
-chris
