7 EoF and EoWDM service management scenarios
Ethernet over Fiber (EoF) Management
Ethernet over WDM (EoWDM) Management
Client
NMS/OSS
E-2-E Ethernet service OAM
Access link OAM (802.3ah)
Fiber span
Edge switch Edge switch
Local
side
Local side
Remote
side
Remote side
EDD/
UNI
EDD EDD
EDD/
UNI
OSS
E-2-E Ethernet services
OAM (Y.17EthOAM)
Transport NMS
(OTN framework)
Provider
edge node
CORBA, TL1
Provider
edge node
DWDM network
CPE
Access link OAM
(802.3ah)
CPE
EDD/
UNI
EDD/
UNI
218 Chapter 8
This is clearly problematic if client gears lack carrier-grade support. For example, service
protection may have to use slower Ethernet rapid spanning tree protocol (RSTP)
or MPLS rerouting protocols. Although Ethernet interface ports could possibly incorporate
1+1 fiber protection, few vendors support this option. Similarly, carrier-grade
OAM support may be limited as associated Ethernet OAM standards will take time to
mature. In general, EoF will give much lower fiber resource utilization and higher overbuild,
since few leasing clients will deploy CWDM/DWDM systems to exploit unused
wavelength capacities. This solution is, therefore, only feasible in smaller, fiber-rich
scenarios with relaxed fault-tolerance and OAM needs.
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