Some transport-oriented solutions such as PON are poorly equipped to deliver carrierclass
QoS, and so tend to be used for best-effort services and not mission-critical latencysensitive
applications.
Provisioning new Ethernet services is one area where substantial development is
still required. Table 16.5 summarizes the solutions in respect to this attribute.
Standardized Management This is one area where the existing Carrier Ethernet solutions
probably are most lacking. It is also the area that will have a big impact on transforming
Carrier Ethernet into a mass-market service.
OAM is usually offered at the transport/network layer and not at the service layer
(i.e., end to end), but several Bridging solutions on the market are integrating the ITU/
TABLE 16.3 Support of Carrier Ethernet Attribute??”Scalability
Commercial Solution
Millions of End
Users/Points Geographic Reach Bandwidth Granularity
Copper Marginally supported Marginally supported
Access only
Marginally supported
Up to 10 M only
HFC Partially supported
Hundreds are common
Partially supported Partially supported
Up to 100 M
PON Fully supported Marginally supported
Up to 20 km for broadband
access
Fully supported
WDM Fully supported Fully supported
Up to 10,000 Km
Substantially supported
FSO Partially supported Partially supported
Access only
Fully supported
TDM Fully supported Fully supported
Over both copper and fi ber
Fully supported
SONET Marginally supported Substantially supported
Using installed base, offering
Carrier meet point
Marginally supported
RPR Fully supported
Up to 255 nodes and
millions of end users
Fully supported
Up to 2000 km
Fully supported
Bridging Fully supported
Backbone bridging
required
Fully supported Fully supported
MPLS Fully supported Fully supported
On a global scale
Substantially supported
WiMax Partially supported
Hundreds
Partially supported
In the access only
Fully supported
Evolution of Carrier Ethernet Solutions 509
IEEE standards??™ work in this area and delivering OAM capability.
Pages:
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135