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

"Bernie Volz (volz)" <volz@cisco.com> Mon, 06 April 2020 14:14 UTC

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From: "Bernie Volz (volz)" <volz@cisco.com>
To: "otroan@employees.org" <otroan@employees.org>, Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>
CC: "v6ops@ietf.org" <v6ops@ietf.org>
Thread-Topic: [v6ops] WG Last Call on draft-ietf-v6ops-cpe-slaac-renum
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Date: Mon, 06 Apr 2020 14:13:48 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/v6ops/byNEanEJKTriS3DfsuIzAgTvqSU>
Subject: Re: [v6ops] WG Last Call on draft-ietf-v6ops-cpe-slaac-renum
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Hi:

>Something like: "A network provider that has to renumber a customer network, must continue to include the old prefix in DHCP PD messages with lifetimes set to 0 for a while, to ensure that stale prefix information can be expired on hosts attached to the network

That would be a change to DHCPv6 as there is no such clear requirement in that specification. The "for a while" would be until the (longest communicated) valid lifetime would have expired.

What is being proposed is that the CPE remember this information.

- Bernie

-----Original Message-----
From: v6ops <v6ops-bounces@ietf.org> On Behalf Of otroan@employees.org
Sent: Monday, April 6, 2020 8:57 AM
To: Ron Bonica <rbonica=40juniper.net@dmarc.ietf.org>
Cc: v6ops@ietf.org
Subject: Re: [v6ops] WG Last Call on draft-ietf-v6ops-cpe-slaac-renum

> This message initiates a WG Last Call on draft-ietf-v6ops-cpe-slaac-renum.
>  
> Please submit comments by April 13, 2020.

0) Remove the reference to the individual draft in introduction.

1) the document proposes a workaround for the case where the service provider does not renumber the network correctly.
It would be useful to add a paragraph in the introduction describing the "correct" procedure. This to ensure that a reader would not be confused and think this is how the DHCP PD mechanism is intended to work.
I don't think there is a reference for that, I'm not sure we have written down the correct DHCP PD behaviour when doing instant renumbering?
Something like: "A network provider that has to renumber a customer network, must continue to include the old prefix in DHCP PD messages with lifetimes set to 0 for a while, to ensure that stale prefix information can be expired on hosts attached to the network".

2) Rewrite the document as an update to RFC7084. Make the new requirements as WPD-<nn>

Ole
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