nanog mailing list archives
Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01]
From: Stephen Sprunk <stephen () sprunk org>
Date: Mon, 26 Apr 2010 09:20:30 -0500
On 24 Apr 2010 21:01, Mark Smith wrote:
On Thu, 22 Apr 2010 01:48:18 -0400 Christopher Morrow <morrowc.lists () gmail com> wrote:On Wed, Apr 21, 2010 at 5:47 PM, Mark Smith <nanog () 85d5b20a518b8f6864949bd940457dc124746ddc nosense org> wrote:So what happens when you change providers? How are you going to keep using globals that now aren't yours?use pi space, request it from your local friendly RIR.I was hoping that wasn't going to be your answer. So do you expect every residential customer to get a PI from an RIR?
The vast majority of residential customers have no idea what "globals" or "PI" are. They use PA and they're fine with that--despite being forcibly renumbered every few hours/days. (Many ISPs deliberately tune their DHCP servers to give residential customers a different address each time for "market segmentation" reasons.)
Here's the scenario: I'm a typical, fairly near future residential customer. I have a NAS that I have movies stored on. My ISP delegates an IPv6 prefix to me with a preferred lifetime of 60 minutes, and a valid lifetime of 90 minutes. ... I start watching a 2 hour movie, delivered from my NAS to my TV over IPv6, using the GUA addresses (because you're saying I don't ULAs). 5 minutes into the movie, my Internet drops out.
And five minutes and a few seconds into the movie, the movie drops out because the DRM mechanism can't phone home anymore to validate you still have a license to watch it. I have an IP-based DVR, and that's exactly what happens. However, let us look forward to a world where the TV/movie studios have woken up to the fact that DRM does more harm than good, as the record industry recently has:
1 hour, 35 minutes into movie, the movies drops out, because the IPv6 addresses used to deliver it can't be used anymore.
The vast majority of residential customers have a single subnet, so they can get by just fine using IPv6 link-local addresses. The vanishingly small percentage that have multiple subnets are presumably savvy enough to set up ULA-R addresses. There is no need for ULA-C in this scenario. The only semi-rational justification for ULA-C is that organizations privately internetworking with other organizations are scared of ULA-R collisions. However, PI solves that problem just as readily. If one cannot afford or qualify for PI, or one wants a non-PI prefix due to delusions of better security, one can use a private deconfliction registry, e.g. <http://www.sixxs.net/tools/grh/ula/>. S -- Stephen Sprunk "God does not play dice." --Albert Einstein CCIE #3723 "God is an inveterate gambler, and He throws the K5SSS dice at every possible opportunity." --Stephen Hawking
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Current thread:
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01], (continued)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Mark Smith (Apr 25)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Jack Bates (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Mark Andrews (Apr 25)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Mark Smith (Apr 25)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Tony Hoyle (Apr 25)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Mark Smith (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Tony Hoyle (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Owen DeLong (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Christopher Morrow (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Jack Bates (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Stephen Sprunk (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Owen DeLong (Apr 26)
- RE: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Tony Hain (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Bill Stewart (Apr 29)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Owen DeLong (Apr 29)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Mans Nilsson (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] sthaug (Apr 26)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] Richard Barnes (Apr 22)
- Re: [Re: http://tools.ietf.org/search/draft-hain-ipv6-ulac-01] bmanning (Apr 21)