Appendix
C ATM OAM Functionality
Installation and Operation Manual
C-8
OAM Modes of Operation over ATM
ACE-3105, ACE-3205 Ver. 5.2
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When F5 segment AIS cells are received, AIS state is declared. F5 end-to-end
AIS cells are generated towards the forward direction, while F5 segment RDI
cells are generated towards the backward direction.
Figure
C-19. VC Segment Point – Case B
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When a failure is detected on the physical port, AIS state is declared. F5
end-to-end AIS cells are generated towards the forward direction, while F5
segment RDI cells are generated towards the backward direction.
Figure
C-20. VC Segment Point – Case C
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When a VC segment point is set as a CC source point, F5 segment CC cells are
generated towards the backward direction every second.
Figure
C-21. VC Segment Point – Case D
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When a VC segment point is set as a CC sink point, F5 segment CC cells are
expected to be received every second. If no CC cell has been received during
the last 3.5 seconds, AIS state is declared. F5 end-to-end AIS cells are
generated towards the forward direction, while F5 segment RDI cells are
generated towards the backward direction.