Re: [v6ops] new draft: draft-colitti-v6ops-host-addr-availability
Sander Steffann <sander@steffann.nl> Mon, 06 July 2015 12:46 UTC
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From: Sander Steffann <sander@steffann.nl>
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Date: Mon, 06 Jul 2015 14:46:32 +0200
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Subject: Re: [v6ops] new draft: draft-colitti-v6ops-host-addr-availability
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Hi, > A new draft has been posted, at http://tools.ietf.org/html/draft-colitti-v6ops-host-addr-availability. Please take a look at it and comment. Nice draft, and very much needed. I only have a few comments on 8.2. Address space management: > In IPv4, all but the world's largest IPv4 networks can be addressed > using RFC 1918 space. The total size of net 10 is roughly 2^24 (16 > million) endpoints, with each endpoint receiving one IPv4 address. > In IPv6, that is equivalent to assigning one /64 per host out of a > /40. Under current RIR policies, a /40 is easy to obtain for an > enterprise network. I wouldn’t say that a /40 is easy to obtain for enterprise networks. The usual size is a /48. Of course the networks that actually use all of 10/8 would should no problem getting a /40, but that isn’t true for all enterprises. Suggested new text: """ In IPv4, all but the world's largest IPv4 networks can be addressed using RFC 1918 space. Many networks can be numbered with e.g. 192.168.0.0/16 which has roughly 2^16 (65536) endpoints, with each endpoint receiving one IPv4 address. In IPv6, that is equivalent to assigning one /64 per host out of a /48. Under current RIR policies, a /48 is easy to obtain for an enterprise network. Networks that need a bigger block of RFC 1918 space use 10.0.0.0/8 which is is roughly 2^24 (16 million) endpoints. The equivalent in IPv6 would be assigning a /64 per host out of a /40. Enterprises of such size can easily obtain a /40 under current RIR policies. """ or something similar. > In other words, assigning a single IPv6 /64 per > host is as feasible as assigning a single IPv4 address per host. > > Currently, residential users receive one IPv4 address and a /56 or > /60 IPv6 prefix. I know lots of ISPs that give residential users a /48. I'm afraid this text might suggest giving them small(er) sizes. Maybe change it to: """ Currently, residential users often receive one IPv4 address and a /48, a /56 or even something as tiny as a /60 IPv6 prefix. """ Ok, maybe leave the "even something as tiny as" bit out ;) But that's the message I would like to give to the reader. > While such networks do not have enough space to > assign a /64 per device, today such networks almost universally use > SLAAC. > > Unlike IPv4 where addresses came at a premium, in all these networks, > there is enough IPv6 address space to supply clients with multiple > IPv6 addresses. +1000 Cheers, Sander
- [v6ops] new draft: draft-colitti-v6ops-host-addr-… fred
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Simon Perreault
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Sander Steffann
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Andrew Yourtchenko
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Fred Baker (fred)
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Lorenzo Colitti
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Erik Kline
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Yury Shefer
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Tore Anderson
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Ray Hunter
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Erik Kline
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Tore Anderson
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Andrew 👽 Yourtchenko
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Hemant Singh (shemant)
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Hemant Singh (shemant)
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Brian E Carpenter
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Fred Baker (fred)
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Brian E Carpenter
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Hemant Singh (shemant)
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Sander Steffann
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Fred Baker (fred)
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Tom Taylor
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Jouni Korhonen
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Erik Kline
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Alexandru Petrescu
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Mukom Akong T.
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Dave Thaler
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Mikael Abrahamsson
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Ross Chandler
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Mark Smith
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Lorenzo Colitti
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… George, Wes
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… George, Wes
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Mark Smith
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… George, Wes
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Templin, Fred L
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Lorenzo Colitti
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Fred Baker (fred)
- Re: [v6ops] new draft: draft-colitti-v6ops-host-a… Alexandru Petrescu