nanog mailing list archives
Re: Addressing plan exercise for our IPv6 course
From: Saku Ytti <saku () ytti fi>
Date: Sun, 25 Jul 2010 11:40:19 +0300
On (2010-07-25 17:32 +1000), Karl Auer wrote:
The risk of a ULA prefix conflict is for *all practical purposes* zero.
http://www.wolframalpha.com/input/?i=1-((2^40)!)%2F((2^40)^1000000+((2^40)-1000000)!)+ It wouldn't puke nice graph with 'n', it did try, but never finished. So if there are million assigned ULA's there is 36.5% chance of collision, if formula is right. If operator fscks-up their residential DSL product, lets say the assign all the /128 user could want, but from single shared /64 subnet, not routing dedicated /48 to each customer. Users who need to route, will want solution and some vendor will step in, providing router which will auto-assign ULA + NAT66, will that vendor sell million copies of said CPE? But I don't think it is interesting to discuss the random chance of collisions, as human factor will guarantee collisions, many people will assign fd::/48 to get short and memorable addresses in their network. (You've made your bed, now lie in it.) If your IT staff includes personnel who've done painful renumbering due to M&A, there is good chance they'll allocate random, otherwise they'll likely opt for short and memorable network, as they did with RFC1918. Just because we get IPv6, doesn't mean people will get sudden burst of insight in design and engineering. -- ++ytti
Current thread:
- Re: Addressing plan exercise for our IPv6 course, (continued)
- Re: Addressing plan exercise for our IPv6 course Owen DeLong (Jul 25)
- Re: Addressing plan exercise for our IPv6 course David Conrad (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Owen DeLong (Jul 25)
- Re: Addressing plan exercise for our IPv6 course David Conrad (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Jack Bates (Jul 24)
- Re: Addressing plan exercise for our IPv6 course David Conrad (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Mark Smith (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Randy Bush (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Doug Barton (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Karl Auer (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Saku Ytti (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Mark Smith (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Valdis . Kletnieks (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Saku Ytti (Jul 25)
- RE: Addressing plan exercise for our IPv6 course Nathan Eisenberg (Jul 25)
- RE: Addressing plan exercise for our IPv6 course Karl Auer (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Valdis . Kletnieks (Jul 25)
- Re: Addressing plan exercise for our IPv6 course David Conrad (Jul 24)
- Re: Addressing plan exercise for our IPv6 course Jack Bates (Jul 24)
- Re: Addressing plan exercise for our IPv6 course David Conrad (Jul 25)