Falcon
M-Class
| User Guide
337
Figure 4-197: Performance Monitor Displays
4.22.8.1
Performance Monitoring Data Set
Enable
When enabled this MEP instance will contribute to the 'PM Data
Set' gathered by the PM Session.
4.22.8.2
Loss Measurement LM
A MEP has two local counters: a TX frame counter and an RX frame counter.
Frame loss measurement is performed by two peer MEPs exchanging these counters.
There are two methods for loss frame measurement: single and dual frame loss measurement
Single ended LM
This method is used as on
–
demand tool to measure the frame loss factor.
MEPs use LMM (Loss Measurement Message) and LMR (Loss measurement Return) to deliver
information on number of service frames transmitted and received.
The MEP starts the measurement by transmitting a LMM towards its peer MEP. The peer MEP
transmits a LMR in response to the received LMM. Then, the initiator MEP measures the loss at its
own end (near-
end loss) and loss at peer’s end (far
-end loss) based on the information contained in
the LMR and the local counters.
Содержание Falcon Gen-3 M-Class
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