[netmod] Liaison statement to ORAN

Balázs Lengyel <balazs.lengyel@ericsson.com> Wed, 18 November 2020 08:09 UTC

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From: =?iso-8859-1?Q?Bal=E1zs_Lengyel?= <balazs.lengyel@ericsson.com>
To: "'netmod@ietf.org'" <netmod@ietf.org>
CC: Jacqueline Beaulac S <jacqueline.s.beaulac@ericsson.com>, Robert Petersen <robert.petersen@ericsson.com>
Thread-Topic: Liaison statement to ORAN
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Date: Wed, 18 Nov 2020 08:09:41 +0000
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Subject: [netmod] Liaison statement to ORAN
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Hello,

In connection to the draft
https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01 I propose to
send a liaison statement from IETF Netmod to ORAN.

 

The issue: 3GPP is standardizing a good number of YANG modules as part of
the 3gpp TS 28.541 and 28.623
(https://forge.3gpp.org/rep/sa5/MnS/tree/Rel17-draft/yang-models). 

ORAN plans to re-use this models, but possibly refine them in some ways.
They are considering using deviations to do this. 

E.g. change config=true schemas node to config=false. This creates problems
as documented in
https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01#section-5.8.1
<https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01%23section-5.
8.1> 

 

-   Deviations by an SDO (standard defining organization) prevent
implementations from reporting their own deviations for the same nodes.

-   Deviations by an SDO prevent implementations from conforming to the
standards specified by both SDOs.

 

To avoid these problems I propose to send the following text to ORAN:

 

“IETF NETMOD working group requests ORAN to avoid using deviations as part
of its specification. As documented in
https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01#section-5.8.1
<https://tools.ietf.org/html/draft-ietf-netmod-yang-packages-01%23section-5.
8.1>  the usage of deviations would prevent:

*	Vendors to implement their own deviations for the same YANG schema
nodes
*	Vendors to claim conformance to both ORAN and 3GPP specifications
which are in some cases used as a base for the ORAN YANG models

Note: These problems with deviations exists even if YANG modules are used
without using YANG packages.

Regards Balazs

 

-- 

Balazs Lengyel                    Senior Specialist
Ericsson Hungary Ltd. 

Mobile: +36-70-330-7909              email: Balazs.Lengyel@ericsson.com