Figure 11.7 illustrates the role of the EoS-enabled MSPP in the delivery of E-Line
services. In this scenario, the MSPP provides transport and delivers the service. It must,
therefore, provide not only the functions of EoS transport (e.g., GFP/VCAT/LCAS), but
also the capabilities necessary to provide MEF-compliant E-Line service. These service
delivery functions include Ethernet frame classification, policing, QoS and traffic
management support, and proper handling of Ethernet control protocol data units
Figure 11.7 The MSPP and E-Line service delivery
OC-12
Access ring
OC-N
OC-192
Interoffice ring
A
B
C
D
E
F
Central
office MSPP
MSPP
SONET
ADM
DS-n
DS-n
DS-n
MSPP
Gigabit
Ethernet
Gigabit
Ethernet
Fast
Ethernet
Fast
Ethernet
Fast
Ethernet
Fast
Ethernet
MSPP
Central
office
Central
office
OC-48
Access ring
SONET
ADM
MSPP
SONET
ADM
OC-48
Access ring
100 Mbps EPL between Ethernet UNIs A and E
20 Mbps EPL between Ethernet UNIs B and C
500 Mbps EPL between Ethernet UNIs D and F
SONET/MSPP 315
(PDUs) [13]. Examples of E-Line services that use MSPPs include Verizon??™s Ethernet
Private Line, Verizon??™s Optical Networking (VON) services, and Time Warner Telecom??™s
Extended Native LAN (ENLAN) service.
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