[Nsi-wg] NSI naming

[Jeroen van der Ham]

John Vollbrecht wrote:
> I agree this is hard.  I think levels and layers are different.   
> Layers apply to protocol layers.  I may misuse the term.  Levels for  
> me apply to what can be switched for a given topology.  I.e. A given  
> topology allows VLANS to be created ete, by concatenating VLANS at  
> each edge point.  The VLANS to be switched are carried on something  
> else - SONET trunks, GOLEs, Ethernet trunks, etc.  Level in this case  
> refers to VLANs on  one level and what carries them on the other.

A node in a network operates on a certain layer in the network protocol 
stack. The node switches, or routes based on (header)information from 
that layer, right?

Using that definition, network encapsulated in VLANs are also in a layer 
on top of Ethernet (or other VLANs, or whatever you would want to 
encapsulate it in).

Perhaps it's me, but I still do not see a difference between layer and 
level so far.

Jeroen.