Re: [YANG] new pyang errors

Juergen Schoenwaelder píše v St 23. 01. 2008 v 11:06 +0100:

> 
> But we seem to have fundamental differences about the split of work:
> 
> - I want the NETCONF server to be authoritative to tell the client what
>   the configuration is, with and without defaults expanded.

A simpler protocol is better. If you allow this choice, you also have
to:
1. extend the NETCONF protocol so that it is able to distinguish 
   between the two cases,
2. carefully specify the semantics of concepts like default values, 
   mandatory versus optional etc.

> 
> - You seem to assume some magic processing exists on the manager side
>   which takes what the device reports and modifies it e.g. by patching
>   in defaults yielding a complete config.

Why do you call it magic? It's perfectly deterministic and local
processing from client's point of view - the application has all
information and just does what the user wants. And the user can always
check what's going on without caring about what "magic" happened at the
remote end. It can efficiently work even with different devices - the
factory defaults are not relevant here.

It does imply slightly more complexity than raw ssh on the manager side,
but for the managed device it is actually simpler - it needn't care
about which values in its config datastore differ from factory defaults.

Lada

-- 
Ladislav Lhotka, CESNET
PGP Key ID: E74E8C0C

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