VeEX VePal TX130M+, User Manual

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10.3.6 Frame Loss Measurement
Two local counters for each peer MEP:
TxFCf: Counter for in-profile data frames transmitted towards peer MEP
RxFCf: Counter for in-profile data frames received from peer MEP
Single-ended ETH-LM:
On demand OAM
MEP sends LMM frame (Unicast DA or Multicast Class 1 DA) and receives LMR frame (Unicast DA) with counters
CCM frames contain frame counters.
Single Ended Frame Delay Measurement
LMM frames contain frame counters.
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10.3.7 Delay Measurement
On demand OAM for measuring Frame Delay (FD) and Frame Delay Variation (FDV):
TxTimeStampf = Timestamp transmission of DMM frame
RxTimef = Reception time of the DMM frame
RxTimeb = Reception of DMR frame
Two-way ETH-DM:
DMM frame (Unicast DA or Multicast Class 1 DA for multipoint measurement) & DMR frame (Unicast DA)
FD = RxTimeb – TxTimeStampf
Dual Ended Frame Delay Measurement
DMM and DMR frames contain timestamp info.
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