[Nsi-wg] NSI naming
Jeroen van der Ham
vdham at uva.nl
Wed May 13 03:56:23 CDT 2009
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.
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