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Re: [v6ops] What problem are we trying to solve? (Re: A broken promise - "You said PD Prefix Valid Lifetime is going to be X" (Re: SLAAC renum: Problem Statement & Operational workarounds))

Tassos Chatzithomaoglou <achatz@forthnet.gr> Tue, 12 November 2019 21:20 UTC

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To: Fernando Gont <fgont@si6networks.com>
Cc: v6ops list <v6ops@ietf.org>
References: <CAHL_VyBC3NbT4b-mnacU+ZmzyXus4HXcKx9ykdWJ3_a2uJCi4g@mail.gmail.com> <903CD569-A1A6-4BEC-A1FE-69706D04CF88@fugue.com> <CAO42Z2zWTediRkaF_pfot_QT9Hsf5Wdu9_77BQZjEEG5wY1jdQ@mail.gmail.com> <5a479b19-bf77-4c06-123f-87ed67fb5e09@si6networks.com> <CAO42Z2zTBXCA7HVBYfXsZFC91-Ac5h6m4fAvgBFPHz8xTfNZTA@mail.gmail.com> <6aca00b4-2502-0c64-cf9a-78184f32ddcc@forthnet.gr> <2c95e214-7a64-311a-e856-d5891dda260d@si6networks.com>
From: Tassos Chatzithomaoglou <achatz@forthnet.gr>
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Date: Tue, 12 Nov 2019 23:20:16 +0200
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Subject: Re: [v6ops] What problem are we trying to solve? (Re: A broken promise - "You said PD Prefix Valid Lifetime is going to be X" (Re: SLAAC renum: Problem Statement & Operational workarounds))
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Fernando Gont wrote on 12/11/19 16:33:
> On 12/11/19 04:11, Tassos Chatzithomaoglou wrote:
>
>> The subscriber should have the choice to decide and the technology should give the means to support his/her choices.
>> We're building a page inside our subscriber portal, where the subscriber chooses how frequently the LAN IPv6 assigned prefix should change.
>> Default is to change at every PPP reconnect, but the subscriber can choose specific periods (x weeks/months) or action (once at next reconnect).
> So, upon a CPE crash and reboot, the subscriber would get a different
> prefix. Right?
>
> Thanks!
>
> Cheers,
Yes, the current default is for the subscriber to get a different prefix after a CPE crash and reboot (like in IPv4). But a CPE crash is not a common case. The most common case for prefix change is a DSL disconnect (due to line issues) or a PPP disconnect (due to network issues).
Also, many of our CPEs store internally the prefix, so after a PPP reconnect they inform the LAN hosts about its release.

--
Tassos

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