Rob:

You and I are aligned our opinions of the correct approach and what I need to 
chat with the ADs about. 

However, as a chair my responsibility is to grease the wheels of progress by 
checking with the ADs before we send in the document. 

Dutifully  Sue 

-----Original Message-----
From: Rob Wilton (rwilton) [mailto:[email protected]] 
Sent: Wednesday, August 21, 2019 1:06 PM
To: tom petch; Susan Hares; 'Qin Wu'; [email protected]
Subject: RE: I-D Action: draft-ietf-i2rs-yang-l2-network-topology-09.txt

Hi Tom,

I've no issues with Sue checking with the ADs, but it might be helpful to point 
out:
 - There is already a regular IEEE/IETF liaison meeting that invariable 
includes discussion on YANG issues.  The sub-interface VLAN YANG model was part 
of this meeting for several years (due to technology overlap).
 - The VLAN definitions are in ieee802-dot1q-types.yang because (i) that is 
what we asked them to do, and (ii) they own the technology, and want to 
maintain control over it.
 - Generally, I think that IEEE and IETF currently have good form working 
together.  Of course, that could change in the future, but I suspect that if 
the IEEE decided to completely ditch YANG then I would expect them to be 
willing to find a solution for ieee802-dot1q-types.yang as well.

Also looking at this from the other direction, if we want to redefine these 
types then I think that we would risk slowing down the draft to get permission 
from the IEEE 802.1 WG that they are happy for us to redefine these types (my 
initial instinct from my previous interactions is that IEEE 802.1 WG would 
probably not be happy - although of course I do not and cannot speak for them!)

Thanks,
Rob


> -----Original Message-----
> From: i2rs <[email protected]> On Behalf Of tom petch
> Sent: 21 August 2019 17:38
> To: Susan Hares <[email protected]>; 'Qin Wu' <[email protected]>; 
> [email protected]
> Subject: Re: [i2rs] I-D Action: 
> draft-ietf-i2rs-yang-l2-network-topology-
> 09.txt
> 
> ----- Original Message -----
> From: "Susan Hares" <[email protected]>
> Sent: Wednesday, August 21, 2019 2:35 PM
> 
> Tom:
> 
> Would you like me to check with the NM/OPS AD as well on this point?
> They
> may have an agreement with the IEEE folks on yang models.
> 
> <tp>
> 
> Sue
> 
> 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 [mailto:[email protected]]
> Sent: Wednesday, August 21, 2019 4:53 AM
> To: Qin Wu; [email protected]
> Cc: Susan Hares
> 
> Qin
> 
> 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 
> IEEE 802.1Q.
> 
> 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 
> evolution 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" <[email protected]>
> To: <[email protected]>
> Cc: "Susan Hares" <[email protected]>; "tom petch" <[email protected]>
> Sent: Monday, August 19, 2019 8:08 AM
> 
> > v-09 is posted to address Tom's comments.
> > The diff is:
> >
> https://www.ietf.org/rfcdiff?url2=draft-ietf-i2rs-yang-l2-network-topo
> lo
> gy-09
> > 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 [mailto:[email protected]] 代表
> [email protected]
> > 发送时间: 2019年8月19日 15:04
> > 收件人: [email protected]
> > 抄送: [email protected]
> > 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
> directories.
> > 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
> Topologies
> >         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:
> >
> https://datatracker.ietf.org/doc/draft-ietf-i2rs-yang-l2-network-topol
> og
> y/
> >
> > There are also htmlized versions available at:
> >
> https://tools.ietf.org/html/draft-ietf-i2rs-yang-l2-network-topology-0
> 9
> >
> https://datatracker.ietf.org/doc/html/draft-ietf-i2rs-yang-l2-network-
> to
> pology-09
> >
> > A diff from the previous version is available at:
> >
> https://www.ietf.org/rfcdiff?url2=draft-ietf-i2rs-yang-l2-network-topo
> lo
> gy-09
> >
> >
> > Please note that it may take a couple of minutes from the time of
> submission until the htmlized version and diff are available at 
> tools.ietf.org.
> >
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> >
> > _______________________________________________
> > I-D-Announce mailing list
> > [email protected]
> > https://www.ietf.org/mailman/listinfo/i-d-announce
> > Internet-Draft directories: http://www.ietf.org/shadow.html or
> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> >
> 
> 
> _______________________________________________
> i2rs mailing list
> [email protected]
> https://www.ietf.org/mailman/listinfo/i2rs

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