Re: [i2rs] Kathleen Moriarty's No Objection on draft-ietf-i2rs-yang-l3-topology-08: (with COMMENT)

Martin: 

Your statement "One problem is that relying on the solution in
draft-ietf-netmod-revised-datastores-00 is a bit premature - in fact, that
document does not yet provide any details at all on the I2RS ephemeral data
store." This statement is not what I understood from IETF 98 or the netmod
ADs.   I guess your objection to this data model falls into Benoit Claise
(AD) and the NETMOD folks to answer. 

Sue Hares 

-----Original Message-----
From: i2rs [mailto:i2rs-bounces@ietf.org] On Behalf Of Martin Bjorklund
Sent: Monday, January 23, 2017 5:26 PM
To: shares@ndzh.com
Cc: i2rs@ietf.org; draft-ietf-i2rs-yang-l3-topology@ietf.org;
j.schoenwaelder@jacobs-university.de; i2rs-chairs@ietf.org; nite@hq.sk;
Kathleen.Moriarty.ietf@gmail.com; iesg@ietf.org
Subject: Re: [i2rs] Kathleen Moriarty's No Objection on
draft-ietf-i2rs-yang-l3-topology-08: (with COMMENT)

"Susan Hares" <shares@ndzh.com> wrote:
> Robert and Martin: 
> 
> I agree with Robert that the current implementations of the ODL 
> topology models are handled as part of the configuration data store with
ephemeral
> state.   I will point out that these implementation are pre-standards
> implementations of the I2RS YANG Data model.  
> 
> While standardizing the topology data models, the I2RS WG have been 
> asked to align with the draft-ietf-netmod-revised-datastores-00.txt 
> NETMOD WG document.  This NETMOD WG document moves the I2RS ephemeral data
store from
> configuration data store to a Control Plane data store.   If we follow
this
> draft, the I2RS Topology models are part of the I2RS ephemeral data store.
> If you disagree with the placement of the Topology data models, please 
> indicate this to the NETMOD WG and to Benoit.  Could you propose a way 
> that you would see the ephemeral state working with the configuration data
store
> to the NETMOD WG?   
> 
> Quite frankly, I feel a bit of whip-lash on this topic.   NETMOD WG asks
for
> Control Plane Data store.  You ask for configuration data store (which 
> was the I2RS initial proposal).

Not really; I ask for clarification.

> It is possible for either one to work for I2RS
> Topology models - if the right details are taken care of.   How do we make
> progress on choosing one method so we can write the I2RS Topology 
> Models security considerations.?

One problem is that relying on the solution in
draft-ietf-netmod-revised-datastores-00 is a bit premature - in fact, that
document does not yet provide any details at all on the I2RS ephemeral
datastore.

So I see two alternatives.  Either wait with these documents, or publish
them with their datamodels as is (i.e., no new additional notes), for the
existing protocols and architecure.  This would allow them to be implemented
just like any other YANG data model.  This would mean that the normal YANG
security considerations guidelines should be followed.

/martin

> 
> Sue
>   
> -----Original Message-----
> From: Robert Varga [mailto:nite@hq.sk]
> Sent: Monday, January 23, 2017 4:11 PM
> To: Martin Bjorklund; shares@ndzh.com
> Cc: i2rs@ietf.org; draft-ietf-i2rs-yang-l3-topology@ietf.org;
> j.schoenwaelder@jacobs-university.de; i2rs-chairs@ietf.org; 
> Kathleen.Moriarty.ietf@gmail.com; iesg@ietf.org
> Subject: Re: [i2rs] Kathleen Moriarty's No Objection on
> draft-ietf-i2rs-yang-l3-topology-08: (with COMMENT)
> 
> On 01/23/2017 09:26 PM, Martin Bjorklund wrote:
> >> I'm pulling your questions to the top of this email. 
> >>
> >>  
> >>
> >> Question 1: Ok.  Just to make sure I understand this correctly - 
> >> these topology models are intended to be I2RS-specific, and they 
> >> cannot be used for any other purpose.  If anyone needs a general 
> >> topology model outside of the I2RS protocol, they will have to 
> >> design their own model.  Is this correct?
> >>
> >>  
> >>
> >> Response 1:  Not really.  
> > Ok, so are you saying that the models are in fact generic, and can 
> > be used outside of I2RS?  I.e., they *can* be used with the normal 
> > configuration datastores?
> > 
> 
> From implementation experience, yes, they can be used for storing 
> configuration. OpenDaylight uses (an ancient predecessor of) 
> yang-network-topo to store configure details about devices in its 
> managed networks.
> 
> Regards,
> Robert
> 
> 

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