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[Dhcpv6bis] Fwd: [v6ops] New Version Notification for draft-hilliard-v6ops-host-addr-update-00.txt

"Bernie Volz (volz)" <volz@cisco.com> Thu, 20 July 2017 12:36 UTC

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From: "Bernie Volz (volz)" <volz@cisco.com>
To: "dhcpv6bis@ietf.org" <dhcpv6bis@ietf.org>
Thread-Topic: [v6ops] New Version Notification for draft-hilliard-v6ops-host-addr-update-00.txt
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Date: Thu, 20 Jul 2017 12:35:35 +0000
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Subject: [Dhcpv6bis] Fwd: [v6ops] New Version Notification for draft-hilliard-v6ops-host-addr-update-00.txt
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Hi:

For -10, should we consider making this (see below) a SHOULD:

3315bis-09 does not recommend this, it says the client MAY do it and MUST rate-limit it (with an example rate-limit of one every 30 seconds).


In any case, the server still needs to keep track

Also, while this is true, do we think that is a serious issue? How frequently are network prefixes changed? With v6 they are probably more stable than they have been for v4. So likely a false argument.

- Bernie (from iPhone)

Begin forwarded message:

From: Lorenzo Colitti <lorenzo@google.com<mailto:lorenzo@google.com>>
Date: July 20, 2017 at 11:42:56 AM GMT+2
To: "Bernie Volz (volz)" <volz@cisco.com<mailto:volz@cisco.com>>
Cc: Tore Anderson <tore@fud.no<mailto:tore@fud.no>>, james woodyatt <jhw@google.com<mailto:jhw@google.com>>, IPv6 Operations <v6ops@ietf.org<mailto:v6ops@ietf.org>>
Subject: Re: [v6ops] New Version Notification for draft-hilliard-v6ops-host-addr-update-00.txt

On Thu, Jul 20, 2017 at 11:23 AM, Bernie Volz (volz) <volz@cisco.com<mailto:volz@cisco.com>> wrote:
>> What if the topology change was such that the global address of the DHCPv6 server is no longer valid due to renumbering?

Address of DHCPv6 server does not matter - it can change. Clients generally never directly address packets to its address. They multicast to fe02::1:2.

Surely the RECONFIGURE is not multicast, but unicast from server to client?

Also, 3315bis recommends that clients refresh information via dhcp when a network change occurs (such as new prefixes in an RA appear).

3315bis-09 does not recommend this, it says the client MAY do it and MUST rate-limit it (with an example rate-limit of one every 30 seconds).

In any case, the server still needs to keep track of all topology changes in order to give a correct answer.

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