[Nml-wg] Terminology

[John Vollbrecht]

Some comments on concepts and naming from ASON view.  The NSI concepts  
are mostly there, but names are slightly different or extended - seem  
comments below.


On Aug 20, 2009, at 11:24 AM, Jeroen van der Ham wrote:

> Hello,
>
> The NSI group has also been studying the G.800 terminology, and has
> attempted to make a table with the different terms in NSI, G.800 and  
> NML.
>
> NSI                     G.800                   NML
> ---			-----			---
> Layer Topology          Layer Network           N/A[1]
> Subnetwork              Subnetwork              Network/ 
> SwitchMatrix[2]
> Link                    Link                    Link[3]
> Port                    Link Point              Port
> Forwarding Port         Forwarding Point        Port
> Segment                 Link connection         Link
>                         Subnet connection
>                         Segment
> Access Port             Access Group            Port?[4]
>
> [1]: The Layer topology concept is not something that we describe
> explicitly. Nor do I think that we really need a name for it. It
> describes a group of nodes on the same layer. We can describe nodes,  
> and
> are planning to describe what layer nodes are on. Getting this group  
> of
> nodes is then just a simple query.
Just a point of information - G.8080 (ASON) calls layer topology a  
routing area, which must exist in a layer.

>
> [2]: A Subnetwork in G.800 terminology is the place where the  
> switching
> occurs. However, the subnetwork concept is used at different  
> abstraction
> levels, and we have not decided yet how to represent different
> abstraction levels.
>
> [3]: The Link concept is still somewhat vague. G.800 uses the term  
> Link
> to describe a connection between two ports (G.800: points). However,
> they also describe a concept of multiplexing using forwarding ports,
> creating a bundle of links on the client layer, this bundle is not
> explicitly named in G.800.
> I'm not entirely sure whether NSI Link concept is the NML Link  
> concept,
> or the G.800 bundle (or both).

Another point of information.  In G.8080(ASON) and NSI link is called  
a SNPP Link
(for SubNet Point Pool) and a segment or link connection is called a  
SNP link connection.

>
> [4]: Access Port is the point at which a client connects to the  
> network.
> In my mind NML does not need to make a special distinction for this,  
> and
> we can just call it a Port.
>
> Jeroen.
> _______________________________________________
> nml-wg mailing list
> nml-wg at ogf.org
> http://www.ogf.org/mailman/listinfo/nml-wg

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.ogf.org/pipermail/nml-wg/attachments/20090820/f428bb24/attachment.html