In a Service Provider network, there are usually a hundredfold more
end users and as a consequence, exponentially more connections for Ethernet-based
8 Or multiple Service Provider or Network Operator networks, since several such entities could be involved in
the delivery of an Ethernet service. A Network Operator owns the delivery infrastructure but may or may
not be the one offering a service (or the Service Provider).
Carrier Ethernet 51
applications simply because it covers a larger geographic area. Carrier Ethernet solutions,
therefore, scale across several dimensions simultaneously:
?– Users/endpoints A Service Provider network supports hundreds of thousands
of endpoints and millions of Ethernet users in an optimal fashion. Specifically, it
supports the delivery of millions of Ethernet services with an appropriate level of
performance or QoS.
?– Geographical reach The services delivered can span access, metros, and beyond
to encompass very large geographical distances and over a variety of infrastructures
including Ethernet, WiFi, WiMax, TDM, SONET, and so on. As noted
previously, the reach of such services can be augmented by employing multiple
Service Providers??™ adjacent networks.
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