This section describes how to configure frame loss measurement (LM) for MPLS-TP services.
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
Single-ended Frame LM
Dual-ended Frame LM
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.
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.
- 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 dual-ended frame LM.
(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.
(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.
- On the MEP, run cc send enable
The MEP is enabled to send CCMs.
- On the RMEP, run cc send enable
The RMEP is enabled to send CCMs.
- On the MEP, run cc receive enable
The MEP is enabled to receive CCMs.
- On the RMEP, run cc receive enable
The RMEP is enabled to receive CCMs.
- Run lost-measure dual-ended enable
Dual-ended frame LM is enabled.