Passive Optical Networks (PONs) 171
Organization-Specific Extensions Any organization-specific extensions to the generic
Ethernet OAM protocol are based on the allocation of specific TLVs carried in standard
compliant OAMPDUs, as well as on the allocation of organization/task-specific OAMPDUs
targeting other functionalities besides those originally defined in the respective IEEE
standard. These OAM extensions carry an organization unique identifier (OUI) in the
frame to indicate the designator of the extension and to facilitate interoperability testing.
System vendors have chosen to utilize organization-specific extensions to the standard
Ethernet OAM protocol to implement additional and extended events, include
additional information during the discovery phase, or even develop a completely proprietary
OAM protocol, while maintaining the general framework compatibility with
the standard IEEE-compliant OAM.
EFM OAM Even though the EFM OAM protocol is compatible with any legacy P2P
full-duplex Ethernet technology and can be inherently used in even small local area
networks, it was created mainly to reduce expenditures for first-mile service providers,
based on IEEE 802.
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