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Re: [v6ops] WG Last Call on draft-ietf-v6ops-cpe-slaac-renum

Richard Patterson <richard@helix.net.nz> Tue, 05 May 2020 22:57 UTC

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References: <m1jLAfx-0000LNC@stereo.hq.phicoh.net> <f12b7f5c-dcf9-c35b-78c5-ec2c7c35e6c3@si6networks.com> <m1jLT7B-0000I4C@stereo.hq.phicoh.net> <040b3cee-b51f-cac0-7c99-14a37fba7874@si6networks.com> <006D0357-766F-4CC6-9EA7-3A16720B3A46@employees.org> <m1jLZ7K-0000KBC@stereo.hq.phicoh.net> <CD7CBE8D-F3CD-4437-9A5D-9F6BFC615DE9@delong.com> <m1jM7Cf-0000K9C@stereo.hq.phicoh.net> <5079EE4E-D48F-4C8A-ABBC-FB71DDFFC003@delong.com> <m1jMWbe-0000I6C@stereo.hq.phicoh.net> <94021F65-ADBC-43E8-997C-4F0FD25EB5F0@delong.com>
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From: Richard Patterson <richard@helix.net.nz>
Date: Tue, 05 May 2020 23:57:23 +0100
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To: Owen DeLong <owen@delong.com>
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Subject: Re: [v6ops] WG Last Call on draft-ietf-v6ops-cpe-slaac-renum
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On Fri, 10 Apr 2020 at 03:27, Owen DeLong <owen@delong.com> wrote:

> In general, an ISP using DHCP to hand out
> fixed prefixes should be choosing pretty long lease times (on the order
> of weeks if not a month or more, ideally something approximating the
> length of time for which you’ve paid).
>
>
Even with RADIUS-driven fixed-prefix leases, the initial DHCPv6 Solicit
(and less frequently the Renews), are often used for authentication in a
fixed-line broadband IPoE environment.
If the BNG/Server/Relay undergoes maintenance or otherwise loses session
state, the CPE router will then be left with a stale lease until the user
manually reboots/reconnects or the Valid Lifetime expires.  This is
something we are trying to mitigate with draft-patterson-intarea-ipoe-health
and draft-ietf-dhc-dhcpv6-pd-relay-requirements

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