In
Asia, the largest city Ethernet network at the time was built in Seoul with over a 1000
Ethernet switches deployed across this major metropolitan area.
These early city carriers and Ethernet specialists deployed networks before carrierclass
Ethernet equipment was available. They used what can be called enterpriseclass
Ethernet switches, which worked for some time in these networks as they never
achieved the size or scale of an incumbent provider. They could use enterprise-class
equipment by being smart about the design of their networks??”overprovisioning bandwidth
and using redundant hardware at critical network juncture nodes, and of course,
not putting a huge number of customers on the network.
North America is the birthplace of ELECs, yet North American providers still have
an installed base of millions of lines (T1/T3, Frame Relay, and ATM) from which the
larger customers are cautious to move. Major carriers in North America have taken
care of their large Ethernet-desiring customers by delivering highly reliable Ethernet
service over SONET today, and many have rolled out services over an overlay Ethernet
network to small medium enterprises (SMEs).
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