RE: [dhcwg] [v6ops] Combining IPv6 ND and DHCPv6 into a single, unified function

"Templin, Fred L" <Fred.L.Templin@boeing.com> Tue, 28 November 2017 17:09 UTC

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From: "Templin, Fred L" <Fred.L.Templin@boeing.com>
To: Lorenzo Colitti <lorenzo@google.com>, Brian E Carpenter <brian.e.carpenter@gmail.com>
CC: "v6ops@ietf.org" <v6ops@ietf.org>, "6man@ietf.org" <6man@ietf.org>, Michael Richardson <mcr+ietf@sandelman.ca>, "dhcwg@ietf.org" <dhcwg@ietf.org>
Subject: RE: [dhcwg] [v6ops] Combining IPv6 ND and DHCPv6 into a single, unified function
Thread-Topic: [dhcwg] [v6ops] Combining IPv6 ND and DHCPv6 into a single, unified function
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Date: Tue, 28 Nov 2017 17:08:49 +0000
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Hi Lorenzo,

In this proposal, DHCPv6 and IPv6 ND peacefully coexist. After the initial autoconfiguration,
if the host needs to renew, release, rebind, etc. it simply issues a new RS and the router
responds with a new RA. So, all IPv6 ND and DHCPv6 operations are driven from a single
engine, namely RS/RA.

Thanks - Fred

From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of Lorenzo Colitti
Sent: Monday, November 27, 2017 9:22 PM
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: v6ops@ietf.org; 6man@ietf.org; Michael Richardson <mcr+ietf@sandelman.ca>ca>; dhcwg@ietf.org
Subject: Re: [dhcwg] [v6ops] Combining IPv6 ND and DHCPv6 into a single, unified function

On Tue, Nov 28, 2017 at 8:06 AM, Brian E Carpenter <brian.e.carpenter@gmail.com<mailto:brian.e.carpenter@gmail.com>> wrote:
Yes and no. Let's consider a host that needs a particular piece of
information. As an example, consider the address of the next-hop router
for a given prefix. There are three separate parts to this:

1. Receiving some sort of message containing an appropriate option.
2. Decoding the option
3. Storing the result.
[...]

You can't really separate these steps because the protocols that deliver configuration information have different semantics. For example, DHCPv6 is poll-based and requires explicit renewal, but RAs are push-based.