Hi all,

I noticed that there is a draft intents to classify the various yang model, it 
is really a meaningful work. Many points are consistent with my understanding, 
whereas, there are some questions unclear need to inquire.


1.       Why VPLS and VPWS are all service model, which is at the same level 
with L3VPN? In my understanding, L3VPN is a typical service model which hides 
the underlay network, but both VPLS and VPWS is specific technology solutions. 
Maybe a uniform L2VPN which abstracts service information from all layer2 
technologies more like service model.

2.       What is the layer of technology solutions, such as, VxLAN, GRE, VPLS, 
etc?

3.       In TMN M.3010, network model also a particular layer, should specific 
yang model cover this layer?

Best Regards,
Yali

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