?– MIB variable retrieval Providing management information look-up from a
remote database, delivering required OAM-specific information on the given network
structure.
?– Organization-specific enhancements Enabling provision for vendor-specific
enhancements to the protocol, adding any required functionalities that are out of
scope of the respective IEEE standard.
168 Chapter 7
Discovery The OAM Discovery Process is the first phase of IEEE 802.3ah OAM
protocol, and its basic functionality is limited to identifying the individual devices in
the given network domain as well as their OAM capabilities. In the IEEE 802.3ah, upon
powering up, a device enters a discovery state and attempts to send the Information
OAMPDU to its link peer, thus establishing the local link information path, which will
be used further on for exchange of more specialized OAM frames. In the case of standard
Ethernet OAM, the discovery process relies on the Information OAMPDUs, which
are propagated in the given network and trigger all connected OAM-enabled devices
to issue their OAM capabilities information, which will be encapsulated in the appropriate
frames and delivered to other link peer stations.
Pages:
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429