nanog mailing list archives
Re: IPv6 Ignorance
From: Mark Andrews <marka () isc org>
Date: Wed, 19 Sep 2012 13:43:42 +1000
In message <34689.1348009609 () turing-police cc vt edu>, Valdis.Kletnieks () vt edu wri tes:
--==_Exmh_1348009609_2143P Content-Type: text/plain; charset=us-ascii On Tue, 18 Sep 2012 18:18:28 -0400, William Herrin said:In http://lists.arin.net/pipermail/arin-ppml/2010-September/018180.html I complained about mapping the full 32-bits of IPv4 address into an IPv6 prefix. You responded, "You say that like it's somehow a bad thing," and "I'm simply not seeing a problem." Have you come around to my way of thinking that using 6RD with a full 32-bit IPv4 mapping is not such a hot idea?They're not in contradiction - you want a /28 so you can do 6RD, ARIN should let you do that. You want a /28 so you can do a non-6RD network plan, you should be allowed to do that too. But you don't get to deploy 6RD, and then complain that you don't have enough bits left when you try to do a non-6RD design. Or you could be a bit smarter and realize that you probably only actually *need* to use 16 or 20 bits of address for 6RD mapping and leave yourself 16 or 12 for other uses. AS1312 has 2 /16s, so we only need to map 16 bits of address and one more to indicate which /16 it was and the rest can be implicit. Which o f course still loses if you have more than a /8 or so, or if you have 1,495 little prefixes that are scattered all over the /0....
But given that 6rd is DHCP this is all fixed with a little bit of programming. It's not like it's new stuff anyway. It also only has to be done once for each address block. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka () isc org
Current thread:
- Re: IPv6 Ignorance, (continued)
- Re: IPv6 Ignorance Masataka Ohta (Sep 17)
- Re: IPv6 Ignorance Owen DeLong (Sep 17)
- Re: IPv6 Ignorance Masataka Ohta (Sep 17)
- Re: IPv6 Ignorance Owen DeLong (Sep 17)
- Re: IPv6 Ignorance joseph . snyder (Sep 17)
- Re: IPv6 Ignorance William Herrin (Sep 17)
- Re: IPv6 Ignorance Owen DeLong (Sep 18)
- Re: IPv6 Ignorance Valdis . Kletnieks (Sep 18)
- Re: IPv6 Ignorance William Herrin (Sep 18)
- Re: IPv6 Ignorance Valdis . Kletnieks (Sep 18)
- Re: IPv6 Ignorance Mark Andrews (Sep 18)
- Re: IPv6 Ignorance Owen DeLong (Sep 18)
- Re: IPv6 Ignorance Masataka Ohta (Sep 16)
- Re: IPv6 Ignorance Faisal Imtiaz (Sep 16)
- Re: IPv6 Ignorance Justin Wilson (Sep 16)
- Re: IPv6 Ignorance Jason Leschnik (Sep 17)
- Re: IPv6 Ignorance Cameron Byrne (Sep 17)
- Re: IPv6 Ignorance Mark Andrews (Sep 17)