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Issues 1/2 -- Virtual Services
We are seeing new layer 3 services, e.g. PANA
Should this be reflected as a NAS-Port-Type or as a virtual service?
Keeping NAS-Port-Type as the physical layer seems reasonable
Otherwise we will get PANA-Over-DSL-Kind-1 and PANA-Over-DSL-Kind-2 etc.
Can PANA be modeled as a Tunnel-Type?
Intuitively, does not feel quite right.
NAS-Port-Type=IPsec vs. Virtual + TT=ESP?

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