Re: [netmod] Operational state data in <get> operation

Martin Bjorklund <mbj@tail-f.com> Wed, 23 May 2018 07:00 UTC

Date: Wed, 23 May 2018 09:00:13 +0200
Message-Id: <20180523.090013.2000918667483073613.mbj@tail-f.com>
To: rohitrranade@huawei.com
Cc: netmod@ietf.org
From: Martin Bjorklund <mbj@tail-f.com>
In-Reply-To: <991B70D8B4112A4699D5C00DDBBF878A6BBAF534@dggeml510-mbx.china.huawei.com>
References: <991B70D8B4112A4699D5C00DDBBF878A6BBAF534@dggeml510-mbx.china.huawei.com>
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Subject: Re: [netmod] Operational state data in <get> operation
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Hi,

It is correct that <get> cannot return the applied configuration
since it returns running config + state, unless the configuration and
state data are modelled in different branches (e.g., /interfaces and
/interfaces-state).  This is why we introduce <get-data> as a new
operation to retrieve all operational state, including the applied
configuration.


/martin


Rohit R Ranade <rohitrranade@huawei.com> wrote:
> 
> Hi All,
> 
> 
> RFC 6244 says below statements in Section 4.3.1
> 
> "NETCONF does not follow the distinction formulated by the operators
>    between configuration data, operational state data, and statistical
>    data, since it considers state data to include both statistics and
>    operational state data.
> "
> 
> RFC 6241 definition for "state data":
>    o  state data: The additional data on a system that is not
>       configuration data such as read-only status information and
>       collected statistics.
> 
> RFC 8342 definition:
>    o  system state: The additional data on a system that is not
>       configuration, such as read-only status information and collected
>       statistics.  System state is transient and modified by
>       interactions with internal components or other systems.  System
>       state is modeled in YANG using "config false" nodes.
> 
>    o  operational state: The combination of applied configuration and
>       system state.
> 
> According to NMDA, state-data and "system-state" are the same. So
> "state-data" does not include operational state data. This means that
> RFC 6244 understanding is inaccurate regarding state-data ? And hence
> <get> cannot output Operational state as shown below. Please clarify.
> 
> RFC 6241 : Description for <get>
> 7.7.  <get>
> 
>    Description:  Retrieve running configuration and device state
>       information.
> 
> RFC 6241:
> The <get-config> operation retrieves
>    configuration data only, while the <get> operation retrieves
>    configuration and state data.
> 
> 
> 
> With Regards,
> Rohit R Ranade
>

[netmod] Operational state data in <get> operation Rohit R Ranade
Re: [netmod] Operational state data in <get> oper… Martin Bjorklund