?– Carrier Ethernet solutions, however, will converge toward a Bridging/Switching
solution especially in the Access/MANs. This class of solutions will likely also integrate
other technologies such as WDM, FSO, and so on. The situation in the WAN
is less clear.
?– Bridging/Switching Layer 2 solutions form the most efficient approach to deploying
Carrier Ethernet, as noted earlier. Specifically, they are perhaps the
most optimized, native Carrier Ethernet solutions that will support the host of
E-Line and E-LAN services.
?– With fiber deployment accelerating rapidly in the U.S. and elsewhere, such solutions
will become the natural choice for broadband applications.
Figure 16.8 Possible evolution of Carrier Ethernet Delivery Solutions
TDM
SONET
Carrier Ethernet Support
Cu
Bridging
RPR
MPLS
HFC
WiMAX
FSO
PON
Cost of Delivery
Normalized Feature/Cost Analysis
Preferred long-term
solution (Lower cost,
higher functionality)
Short-term solution
(Lower cost, lower
functionality)
Short-term solution
(Higher cost, lower
functionality)
Longer-term solution
(Higher cost, higher
functionality)
Current market
requirement
Future market
requirement
WDM
530 Chapter 16
?– The intensity of competition in delivering Carrier Ethernet will also mean that
Service Providers will choose the most optimal solution for delivery and hence
will invariably move toward a native Ethernet solution with minimal overhead.
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