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

Ted Lemon <mellon@fugue.com> Sat, 11 November 2017 04:01 UTC

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From: Ted Lemon <mellon@fugue.com>
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Subject: Re: [v6ops] Stateful SLAAC (draft-ietf-v6ops-unique-ipv6-prefix-per-host)
Date: Sat, 11 Nov 2017 12:00:09 +0800
In-Reply-To: <6BA4A174-FCE5-4A28-8E9A-B1CAF8685264@gmail.com>
Cc: Fernando Gont <fgont@si6networks.com>, 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>, draft-ietf-v6ops-unique-ipv6-prefix-per-host@tools.ietf.org
To: DY Kim <dykim6@gmail.com>
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On Nov 11, 2017, at 11:57 AM, DY Kim <dykim6@gmail.com>; wrote:
> That the router has to preserve the prefix(es) applies the same to both SLAAC and DHCP. The draft has not brought anything new/strange to the usual behavior of the router in association with SLAAC.

Not correct.   In the case where we are not doing unique prefix per host, the prefix is static.   In a sense it's stateful, in that it is configured on the router, but there is no binding between the host and the prefix.   With unique prefix per host, the router has to have a bunch of prefixes, each of which is allocated to a specific host.   These allocations are dynamic, have lifetimes, and need to be managed.   It is simply not the case that the default behavior and the new behavior are analogous.