(Optional) Configuring Frame LM

This section describes how to configure frame loss measurement (LM) for MPLS-TP services.

Context

Frame LM is a performance monitoring function provided by MPLS-TP OAM. Dual-ended frame LM is performed on the two MEPs of a service link. Measurement results include the following data:

Near-end frame loss data: indicates the number and percentage of lost frames that are sent from an RMEP to a MEP.
Far-end frame loss: indicates the number and percentage of dropped frames that are sent from a MEP to an RMEP.

The NetEngine 8000 F supports single-ended frame LM and dual-ended frame LM. The following table describes their differences.

**Table 1** Differences between single-ended frame LM and dual-ended frame LM
Item	Single-ended Frame LM	Dual-ended Frame LM
Statistics display	Statistics can be displayed using either of the following commands on a MEP: To display statistics about single-ended on-demand frame LM, run the lost-measure single-ended command. To display statistics about single-ended frame LM, run the display mpls-tp oam meg meg-name statistic-type lost-measure single-ended command.	Statistics about dual-ended frame LM can be displayed using the display mpls-tp oam meg meg-name statistic-type lost-measure dual-ended command on a MEP.
Monitoring scenario	On-demand monitoring Proactive monitoring	Proactive monitoring

The procedure for configuring single-ended or dual-ended frame LM is as follows:

All the steps must be performed on both the MEP and RMEP unless otherwise specified.

Procedure

Run system-view
The system view is displayed.
Run mpls-tp meg meg-name
A MEG is created, and the MEG view is displayed.
Choose one of the following sub-procedures as needed:
- Configure single-ended frame LM.
  1. Run lost-measure single-ended receive enable
    The RMEP is enabled to receive LMMs from the MEP.
  2. Perform either of the following steps:
    - Run lost-measure single-ended [ count count-value | exp exp-value | interval interval-value ]^*
      Single-ended on-demand frame LM is enabled on the MEP.
    - Run lost-measure single-ended proactive [ interval interval-value | exp exp-value ] ^*
      Single-ended proactive frame LM is enabled on the MEP.
- Configure dual-ended frame LM.
  1. (Optional) Run cc interval interval-value
    
    An interval at which CCMs are sent is configured.
    Typical CCM transmission intervals and their application scenarios are as follows:
    - 3.3 ms: 300 frames are sent per second. This interval is recommended for protection switching.
    - 100 ms: 10 frames are sent per second. This interval is recommended for performance monitoring.
    - 1000 ms: 1 frame is sent per second. This interval is recommended for fault management.
  2. (Optional) Run cc exp exp-value
    
    A priority is configured for CCMs.
    
    If the MPLS-TP network is severely congested and the priority of CCMs is low, CCMs fail to be sent. Therefore, configure an appropriate priority for CCMs according to network conditions.
  3. On the MEP, run cc send enable
    The MEP is enabled to send CCMs.
  4. On the RMEP, run cc send enable
    The RMEP is enabled to send CCMs.
  5. On the MEP, run cc receive enable
    The MEP is enabled to receive CCMs.
  6. On the RMEP, run cc receive enable
    The RMEP is enabled to receive CCMs.
  7. Run lost-measure dual-ended enable
    Dual-ended frame LM is enabled.