[Nml-wg] Definitions of Topology, Domain and Network

[John Vollbrecht]

I like these definitions, they seem to fit the model of transport and  
service plane.


On Dec 14, 2009, at 7:47 AM, Jeroen van der Ham wrote:

> Hello,
>
> As agreed at the last OGF, Inder and I have worked on the  
> definitions of
> Network, Topology and Domain.
>
> - Topology: A connected graph of Network Elements
> The intended usage of this is to describe the thing that a network
> provider advertises to others as his network topology that is  
> available
> for use.
I assume that a topology could include a set of interconnected groups,  
where that topology is what is available to others from the set of  
groups.  Can a topology be a set of ports that are potentially  
interconnected?
This sounds like a description of transport plane.

>
> - Domain: An unordered collection of Network Elements managed under  
> the
> same shared policy umbrella.
> This describes who or what is responsible for the Network Elements.
This sounds like what NSI is calling a NS actor.  In the case where a  
NS actor calls other NS actors we might need a pseudo domain concept  
for the group of NSAs providing resources.
>
> - Network: no definition
> We had a discussion about the meaning of this term and in the end we  
> had
> to conclude that is not possible to provide a workable definition for
> the term 'Network'. The term Network has become so widely used for so
> many diverse meanings that it is impossible to create a strict
> definition that everyone can agree on, while still expressing  
> something
> useful.
I agree with this.

>
>
> Inder & Jeroen.
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