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Use cases and scenarios
=======================
There are several use cases related to Edge NFV:
1. Isolated vE-CPE.
[vE-CPE]_ is related to most popupar NFV use case where NFVI compute node is
located at customer premises. Typical applications are virtual Firewall and Virtual BGP router;
in simplest case two virtual appliances are hosted at the same CPE compute node.
#. Distributed VE-CPE.
It is the same as above but at least one virtual appliance is
hosted on another compute node, presumably in DC.
#. Residential GW.
Similar to Isolated vE-CPE, the major difference is scale. Typical VNFs are "WAN fault monitoring",
"Performance monitoring". Ratio between deplyed vE-CPE
and Residential GW might reach 1:100 or even 1:1000, thus VNF management overhead must be minimized.
For instance, self-termination after predefined activity period seems preferable over
explicit VNF removing via management system.
#. Distributed Base station.
TBD. What is the difference for it?
#. Network connectivity.
In most cases CPE is connected to Metro Ethernet [#f1]_ .
.. [#f1] In all above use cases management traffic is coming inband with tenant traffic.
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