[netmod] Default statements and deviate add/replace

Balázs Lengyel <balazs.lengyel@ericsson.com> Tue, 22 October 2019 10:56 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: Mark Hollmann <mark.hollmann@ericsson.com>, Edvardas Lasauskas <edvardas.lasauskas@ericsson.com>
Thread-Topic: Default statements and deviate add/replace
Thread-Index: AdWIwoN5sUEukdGAQsGK9U4p7bcxKQ==
Date: Tue, 22 Oct 2019 10:56:08 +0000
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Subject: [netmod] Default statements and deviate add/replace
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Hello, 

I tried testing the following statements:

 

  deviation /nacm:nacm/nacm:enable-nacm {

    deviate add {

      config false;     } }

                

  deviation /nacm:nacm/nacm:rule-list {

    deviate add {

      min-elements 1;     }  }

 

In nacm both the config and the min-elements are absent, so their default
meaning is true. I actually tried both add and replace in deviate.

I got rather confusing results whether the add/replace variant of deviate
should be accepted or rejected because the property already exists or does
not yet exist.

 

Pyang 2.0.2 locally:

Config=false                       add-NOK              replace-OK

Min-elements=1              add-OK                 replace-NOK

 

YANG-Validator  pyang 2.0 & confdc

Config=false                       add-OK                 replace-OK

Min-elements=1              add-OK                 replace-NOK

 

YANG-Validator yanglint

Config=false                       add-OK                 replace-OK

Min-elements=1              add-OK                 replace-OK

 

IMHO the tools should always check the property, so even if the statement is
not present the properties config=false and min-elements=0 ARE present. So
add should be rejected and replace accepted. 

 

Regards Balazs

 

-- 

Balazs Lengyel                    Senior Specialist
Ericsson Hungary Ltd. 

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