Re: [v6ops] Stateful SLAAC (draft-ietf-v6ops-unique-ipv6-prefix-per-host)

DY Kim <dykim6@gmail.com> Sat, 11 November 2017 03:55 UTC

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Subject: Re: [v6ops] Stateful SLAAC (draft-ietf-v6ops-unique-ipv6-prefix-per-host)
From: DY Kim <dykim6@gmail.com>
In-Reply-To: <203d7ede-2169-4a04-e545-2eb48144eac3@si6networks.com>
Date: Sat, 11 Nov 2017 12:54:57 +0900
Cc: IPv6 Operations <v6ops@ietf.org>, "6man@ietf.org" <6man@ietf.org>, "6man-ads@tools.ietf.org" <6man-ads@ietf.org>, "v6ops-ads@ietf.org" <v6ops-ads@ietf.org>, Ted Lemon <mellon@fugue.com>, draft-ietf-v6ops-unique-ipv6-prefix-per-host@tools.ietf.org
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To: Fernando Gont <fgont@si6networks.com>
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The ‘state’ in the wording SLAAC means that of the host, I mean.

SLAAC don’t need to require the router to do anything special, other than the router’s usual prefix advertisement through an RA.

The same is true of the case wherein DHCP is used to assign addresses to hosts by the router.

How the router keeps the link prefix info in its system is an interest neither to DHCP or SLAAC, since the link prefix itself is not about address assignment in which DHCP and SLAAC are interested.

How the router keeps the link prefix(es), whether shared or unique to each hosts, is an issue of the router system implementation, not of the protocols DHCP or SLAAC.

Hence, the question about how the prefix(es) are stored or recovered should be addressed to the router spec, neither to DHCP, nor to SLAAC, nor to this draft, I’d think.

---
DY

> On 11 Nov 2017, at 12:16, Fernando Gont <fgont@si6networks.com>; wrote:
> 
> On 11/11/2017 12:13 AM, DY Kim wrote:
>> The host’s state.
>> 
>> RFC 4862:
>> 
>>  "This document specifies the steps a host takes in deciding how to autoconfigure its interfaces in IP version 6 (IPv6).”
>> 
>>  "The stateless mechanism allows a host to generate its own addresses using a combination of locally available information and information advertised by routers."
> 
> Host state, maintained at the router?
> 
> 
> -- 
> Fernando Gont
> SI6 Networks
> e-mail: fgont@si6networks.com
> PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492