Re: [i2rs] I-D Action: draft-ietf-i2rs-yang-l2-network-topology-09.txt

tom petch <> Wed, 21 August 2019 16:37 UTC

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From: tom petch <>
To: Susan Hares <>, 'Qin Wu' <>, "" <>
Thread-Topic: I-D Action: draft-ietf-i2rs-yang-l2-network-topology-09.txt
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Date: Wed, 21 Aug 2019 16:37:37 +0000
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Subject: Re: [i2rs] I-D Action: draft-ietf-i2rs-yang-l2-network-topology-09.txt
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----- Original Message -----
From: "Susan Hares" <>
Sent: Wednesday, August 21, 2019 2:35 PM


Would you like me to check with the NM/OPS AD as well on this point?
may have an agreement with the IEEE folks on yang models.



Yes please.

I have posted to Netmod where Rob Wilton thinks that it is fine and
copied it to Scott Mansfield.  My unease is rather vague that the IETF
and IEEE may take separate paths, on YANG, at some point. I see this not
as technical, where IEEE clearly have the skills in 802, but rather as
political or management, noting that the tools do not cope with this, as
Qin has found, that the module does not appear in the IANA registry (and
cannot from 802.1Q as it is RFC Required), that Rob sees the reference
as 801.1Qcp and not 802.1Q and so on.  We are making the IETF dependent
on something we have no control and little influence over.

I would like an AD to say that they can see the issues and are content
that there will be no problem in future (I may turn round in five years
time and say 'I told you so' but that is business as usual, for me).

Tom Petch

Cheerily, Sue

-----Original Message-----
From: tom petch []
Sent: Wednesday, August 21, 2019 4:53 AM
To: Qin Wu;
Cc: Susan Hares


You had a note in -07 about whether or not to import definitions from
draft-ietf-softwire; and now I see that -09 imports definitions from

Um.  Different.

I have seen this before but in an I-D that AFAICT never progressed.

I am uncertain what the implications of this are, in terms of the
of the model, of the YANG language and so on, given the different
philosophies of the IETF and IEEE.  I think that it needs a wider review
than it will get on this list so I will flag this to NETMOD and perhaps
again at IETF Last call.

Tom Petch

----- Original Message -----
From: "Qin Wu" <>
To: <>
Cc: "Susan Hares" <>; "tom petch" <>
Sent: Monday, August 19, 2019 8:08 AM

> v-09 is posted to address Tom's comments.
> The diff is:
> Becuase datatracker pyang integration tool issue, Data model
"ieee802-dot1q-types" can not been found
> And imported into the model defined in this draft.
> -Qin
> -----邮件原件-----
> 发件人: I-D-Announce [] 代表
> 发送时间: 2019年8月19日 15:04
> 收件人:
> 抄送:
> 主题: I-D Action: draft-ietf-i2rs-yang-l2-network-topology-09.txt
> A New Internet-Draft is available from the on-line Internet-Drafts
> This draft is a work item of the Interface to the Routing System WG of
the IETF.
>         Title           : A YANG Data Model for Layer-2 Network
>         Authors         : Jie Dong
>                           Xiugang Wei
>                           Qin Wu
>                           Mohamed Boucadair
>                           Anders Liu
> Filename        : draft-ietf-i2rs-yang-l2-network-topology-09.txt
> Pages           : 31
> Date            : 2019-08-19
> Abstract:
>    This document defines a YANG data model for Layer 2 network
>    topologies.
> Editorial Note (To be removed by RFC Editor)
>    Please update these statements within the document with the RFC
>    number to be assigned to this document:
>    o  "This version of this YANG module is part of RFC XXXX;"
>    o  "RFC XXXX: A YANG Data Model for Layer-2 Network Topologies";
>    o  reference: RFC XXXX
>    Please update the "revision" date of the YANG module.
> The IETF datatracker status page for this draft is:
> There are also htmlized versions available at:
> A diff from the previous version is available at:
> Please note that it may take a couple of minutes from the time of
submission until the htmlized version and diff are available at
> Internet-Drafts are also available by anonymous FTP at:
> _______________________________________________
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> Internet-Draft directories: or