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

Lorenzo Colitti <lorenzo@google.com> Mon, 13 November 2017 15:46 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Tue, 14 Nov 2017 00:46:32 +0900
Message-ID: <CAKD1Yr2ny2sGnsSuZevBBbNCkSNNGoxuTVmRFBPNt5WGLy3Hww@mail.gmail.com>
Subject: Re: [v6ops] Stateful SLAAC (draft-ietf-v6ops-unique-ipv6-prefix-per-host)
To: David Farmer <farmer@umn.edu>
Cc: Fernando Gont <fgont@si6networks.com>, IPv6 Ops WG <v6ops@ietf.org>, "6man@ietf.org" <6man@ietf.org>, Ted Lemon <mellon@fugue.com>
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On Tue, Nov 14, 2017 at 12:33 AM, David Farmer <farmer@umn.edu>; wrote:

> You claim this is making SLAAC stateful by adding state to the router.
> However, if anything this reduces the state the router needs to track.
> Currently the router has to track address state of  O(NxM).  Where N =
> Number Hosts, and M = Average Number Addresses used per Host.  With Unique
> Prefix per host, the router only has to track prefix state of O(N).
> Allowing a host to use as many addresses as it sees fit without impacting
> the amount of state the router has to track.
>

+1. Couldn't agree more.


> Finally, this discussion has relieved that there this draft is incomplete
> in several ways.  However this document is not any more incomplete than
> many other documents already approved by the IESG and implemented on
> thousands or even millions of hosts.  That is why we revise documents, we
> never get it right the first time.
>

+1.