Re: [Teas] Poll on making draft-liu-teas-yang-te-topo-01 a WG document

["BELOTTI, SERGIO (SERGIO)" <[e-mail]>]

Hi Daniele, but I think Dieter's comment is in fact linked particularly to  requirement coming e.g. from ACTN, that surely, fall into the first case (hierarchy) not explicitly into the second, that, if understand your statement is more related to horizontal segmentation e.g. for scalability reason than to the possibility to present different level of topologies accordingly  to abstraction required policy.

Thanks
Sergio


From: Teas [mailto:[e-mail]] On Behalf Of Daniele Ceccarelli
Sent: martedì 21 aprile 2015 15:39
To: Beller, Dieter (Dieter); Susan Hares; 'Lou Berger'; 'TEAS WG'
Subject: Re: [Teas] Poll on making draft-liu-teas-yang-te-topo-01 a WG document

Agree Dieter, and I think this maps to "hierarchy" in Susan' commets.

Actually, if my understanding of "wide topology" is correct (I guess it refers to the split of a big topology in smaller "domains") I think that we should consider both.

BR
Daniele

From: Teas [mailto:[e-mail]] On Behalf Of Dieter Beller
Sent: martedì 21 aprile 2015 14:55
To: Susan Hares; 'Lou Berger'; 'TEAS WG'
Subject: Re: [Teas] Poll on making draft-liu-teas-yang-te-topo-01 a WG document

Hi Sue, all,


On 20.04.2015 07:47, Susan Hares wrote:
Dieter:

Do you think the arbitrary number of TE topologies are arbitrary in a hierarchy (1-N levels) or a wide topologies (1-N topologies).
I am having some difficulties to really understand your question. Let me try to clarify what I meant with my comment:

An abstract topology is according to my understanding composed of links and vertices (nodes) and a vertex could be an abstract
node that represents an underlying abstract topology. This underlying abstract topology can be decomposed again into links and
vertices (nodes) when you zoom into an abstract node.

Based on this principle of recursion, you can create a hierarchy that can have arbitrary levels and a further decomposition is possible
until you have not reached the physical node level (bottom of the hierarchy).

I hope this helps.


Thanks,
Dieter




Sue

From: Teas [mailto:[e-mail]] On Behalf Of Dieter Beller
Sent: Friday, April 17, 2015 3:00 PM
To: Lou Berger; TEAS WG
Subject: Re: [Teas] Poll on making draft-liu-teas-yang-te-topo-01 a WG document

Hi Lou, all,

yes/support - however, other than +1 to comments from Paul, Young, and Xian, I would like to emphasize again what I commented
during the discussion in Dallas:

An introduction and a description of the information model (similar to that in draft-ietf-i2rs-yang-network-topo-00) is needed in the
beginning of the document that explains the YANG data model. This section would describe the relationships of the managed entities
(objects) and their attributes with references to the YANG model tree structure and the model definition.

Moreover, for example in the context of ACTN, the model also needs to describe how it can support an arbitrary number of TE
topology hierarchies.  I have seen that the current model already provides some means for that, but this should be described in
more detail and some examples should be provided.


Thanks,
Dieter



On 13.04.2015 20:08, Lou Berger wrote:

All,



This is start of a two week poll on making

draft-liu-teas-yang-te-topo-01 a TEAS working group document. Please

send email to the list indicating "yes/support" or "no/do not support".

If indicating no, please state your technical reservations with the

document.  If yes, please also feel free to provide comments you'd like

to see addressed once the document is a WG document.



This document is the product of the TE Topology YANG Model Design Team

and the intent is for this work to serve as the foundation for the WG's

normal activities in this area, i.e., the document is the starting point

for the WG -- not a finished product.  The DT will be closed once we

have a WG document on this topic.



The poll ends Monday April 27th

Thanks,

Lou (and Pavan, who is a co-author)



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