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Re: [dhcwg] draft-ietf-dhc-dhcpv6-yang-04 - DUID representation in the model

hezihao9512 <hezihao9512@gmail.com> Fri, 15 December 2017 05:17 UTC

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Date: Fri, 15 Dec 2017 13:18:10 +0800
From: hezihao9512 <hezihao9512@gmail.com>
To: Ted Lemon <mellon@fugue.com>
Cc: "Bernie Volz (volz)" <volz@cisco.com>, "dhcwg@ietf.org" <dhcwg@ietf.org>, "draft-ietf-dhc-dhcpv6-yang@ietf.org" <draft-ietf-dhc-dhcpv6-yang@ietf.org>, Simon Hobson <dhcp1@thehobsons.co.uk>
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Subject: Re: [dhcwg] draft-ietf-dhc-dhcpv6-yang-04 - DUID representation in the model
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As far as I am concerned, whether a DUID is presented in separated types or in a blob, it can both be treated as a blob.

However, it would be somewhat easier for a device to parse a DUID (if it does want to) in a multi-type presentation than just in a ‘blob’ presentation.

So, I think the separation of types might be better in a way.


On 12/15/2017 07:13，Ted Lemon<mellon@fugue.com> wrote：
On Dec 14, 2017, at 6:04 PM, Bernie Volz (volz) <volz@cisco.com> wrote:
I just don’t see why we bother to separate out anything - just treat it as an opaque “blob” of data.

This is a valid point; realistically, when we defined DUID, we defined it as a blob, and then specified ways of doing it, but insisted that from the perspective of being used as an identifier, it was just a blob; the "how to make" part of the spec is to avoid collisions, not to make the information in the DUID available for the server to parse.

It would be reasonable to say that the yang data model should just present that binary blob to whatever is talking to it, and if that thing wants to have heuristics for picking it apart, that's fine, but the data model doesn't need to do so.

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