It is enormously useful, therefore, to understand the relative applicability of these
solutions as well; after all, it should be evident from the previous chapters that
?– There is no single solution that fits every Service Provider??™s (or, for that matter,
every enterprise??™s) needs
?– Each of these solutions is particularly well suited in certain contexts and less
so??”or not at all??”in others.
Figure 16.1 The landscape of Carrier Ethernet delivery solutions today
SONET/
MSPP
xDSL modem
Copper
WiMax
Bridging
Bridging
Bridging
Packet switched
network
(Ethernet/IP/MPLS)
ADM
ADM
Wireless
backhaul
DS-3
PON
WDM
WDM
Fiber/WDM
MSPP
MSPP
MSPP
OC-12
DS-3
EDD
EDD
EDD
ADM
Evolution of Carrier Ethernet Solutions 503
The rest of the section attempts to evaluate factually??”and based largely on the material
from Part II??”each of these solutions in a holistic manner.
An Assessment of Carrier Ethernet Delivery Solutions
A relatively straightforward approach is used to review the different solutions.
Specifically, the various carrier-class attributes that define and differentiate Carrier
Ethernet are used as the basis for the assessment; these underlying attributes also provide
a fairly holistic framework.
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