6. This native solution is limited to the reach of associated SMF 1310
nm Ethernet interfaces (see Optical Ethernet Interfaces), proprietary versions of which
can extend to 100 km. At the data-plane level, this setup obviously provides hard QoS
at full-rate Ethernet tributary speeds, for example, CIR = 100 Mbps, 1.0 Gpbs, 10 Gbps.
Nevertheless, obtaining dark fiber routes between all endpoints is generally very
costly and gives reduced service velocity??”from a range of days to weeks. Additionally
EoF relegates all control and management to higher-layers, as shown in Figure 8.7.
Fiber and WDM 217
Figure 8.6 Ethernet private line services over fiber (EoF) and WDM (EoWDM)
Ethernet over Fiber (EoF)
Ethernet over WDM (EoWDM)
Data-mining warehouse
Leased / owned point-to-point spans, 40 km
reach (standard), over 100 km (proprietary)
Metro-regional DWDM ring
(50-500 km, 32-128 ?»)
ROADM
EDFA
DWDM lightpaths
(UPSR, SPRING protection)
10G
Base-ER
Gigabit
Ethernet
switches
VoD servers
1000
Base-LR
Corporate data
center / server farm
1000
Base-LX
Storage cluster
(SAN over IP)
Fiber Channel FCIP,
iSCSI
DWDM backbone
OXC mesh
Corporate LAN
1000
Base-LX
Gigabit Ethernet switch
1000
Base-LX
Client OAM
(SNMP, Ethernet OAM)
Carrier-class EMS/NMS
support (TL1, CORBA)
Gigabit Ethernet switch
Figure 8.
Pages:
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544