Re: [YANG] new pyang errors

Hi -

> From: "Phil Shafer" <phil@juniper.net>
> To: "Randy Presuhn" <randy_presuhn@mindspring.com>
> Cc: <yang@ietf.org>
> Sent: Tuesday, January 22, 2008 9:59 PM
> Subject: Re: [YANG] new pyang errors 
...
> >This is sufficient to configure a device, but it's not
> >configuration management.
> 
> I don't follow you here.  Please explain how the alternative
> interpretation of "mandatory" aids in configuration management.
> Is the "with-defaults" view key to a good solution?

For real configuration management, I count among the essentials:
   - the ability to bring a device to a known configuration state
   - the ability to determine exactly what a device's configuration
     state is
   - the ability to store and version this configuration information
   - the ability to create (provision) this information in advance
     of deployment
   - the ability to determine whether a device's actual configuration
     is the same as its desired configuration

The "with-defaults" view sounds like it would help, particulary
if a default-ed value isn't known a priori.

Randy

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