Again, this issue relates more to packet-switching
technologies that use mechanisms such as scheduling, buffer management, and call
216 Chapter 8
admission control. Although these requirements are not directly applicable to
DWDM, it is important to note that this technology can transparently host legacy
TDM equipment (services) alongside Carrier Ethernet. Also, existing TDM management
solutions can also be used, greatly facilitating interim service migrations for
carriers with existing SONET/SDH architectures.
?– Services management DWDM and Ethernet OAM standards have been steadily
evolving to meet ???carrier-class??? OAM needs, as detailed in ???Network & Services
Management??? Robust provisioning control at the DWDM layer is also becoming
available via GMPLS (see ???Optical Network Control???). As vendors start to integrate
these offerings into their EMS/NMS systems, carriers will benefit from a full range
of end-to-end service differentiation and SLA management capabilities.
When Does This Solution Fit?
This section introduces the EoF and EoWDM concepts for provisioning Carrier Ethernet
services. Foremost, it is evident that service definitions will play a critical role in formalizing
the overall client-carrier experience.
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