On Wed, Dec 23, 2015 at 10:05:46PM +0000, Robert Wilton wrote:
> 
> Personally, ignoring all the backwards compatibility issues, I would 
> prefer that interfaces and interfaces-state were a combined single list 
> (as proposed by OpenConfig).  E.g. something along the lines of:
>  - the system can still provide an operational list of discovered 
> interfaces so that clients can know what is there.
>  - but management agents would be expected to explicitly configure 
> (i.e. create an entry for) all interfaces for which it wanted to 
> retrieve data for.
>

A clear separation of config from operational state is one of the
outcomes of the IAB workshop documented in RFC 3535 and it is one of
the key foundations of both NETCONF and YANG. Config and operational
state have different and _independent_ lifetimes - you can have config
for resources that are not present and you can have operational state
for resources that are present but not configured. In addition, the
data models for operational state are often not the same as the data
models for configuration. Merging all things back into a single list
with a single keying (naming) structure gets us back into the mess we
were in with SNMP.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <http://www.jacobs-university.de/>

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