Setting Up Packet Loss Measurement
- 30 Mar 2022
- 3 Minutes to read
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Setting Up Packet Loss Measurement
- Updated on 30 Mar 2022
- 3 Minutes to read
- Contributors
- Print
- DarkLight
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To set up packet loss instances
Access the page SOAM ▶CFM ▶Packet Loss ▶Configuration.
A listing of all existing packet loss instances is displayed.Click Add to create a packet loss instance or click the packet loss instance index to edit an existing packet loss instance.
Complete the required fields, then click Apply.
For more information on specific parameters, refer to the following table.
Packet Loss Configuration (SOAM ▶CFM ▶Packet Loss ▶Configuration)
| Parameter | Description |
|---|---|
| Index | The packet loss instance unique identifier. |
| PL Name Name | The name of the packet loss instance. |
| MEP Index MEP idx | The index assigned to the Maintenance association End Point. |
| MEPID | The local Maintenance association End Point Identifier. |
| Remote MEPID R-MEPID | The remote Maintenance association End Point Identifier. Note: A peer MEP should have the sequence number enabled to allow a local MEP to perform CCM-based packet loss measurements. |
| Priority | The Priority value to be used in VLAN tags, if present, in the transmitted frame. Same as MEP's CCM priority. |
| Interval (ms) | The Interval between packet loss measurements. This is the same as the MEP's CCM interval. |
| Enable | Check box to enable packet loss measurements. |
| Reference Period (minutes) | Specify the reference period in minutes. |
| Threshold (Ratio) | Specify (as a percentage) the maximum ratio of packets lost allowed before issuing an alarm during the reference period. |
Deleting a Packet Loss Instance
CAUTION: Deleting a PL instance will also delete all SA metrics that use this PL instance as the metric source.
To delete a packet loss instance
Access the page SOAM ▶CFM ▶Packet Loss ▶Configuration.
Click the index of the packet loss instance to delete.
Click Delete.
Viewing Packet Loss Results
Packet loss results are calculated with the received CCM during the reference period.
To view details of packet loss results
Access the page SOAM ▶CFM ▶Packet Loss ▶Results.
A summary of results for all packet loss instances is displayed.Click the Index of the packet loss instance you want to view the packet loss results.
For more information on specific parameters, refer to the following table.
Packet Loss Results (SOAM ▶CFM ▶Packet Loss ▶Results)
| Parameter | Description |
|---|---|
| Index | The packet loss instance unique identifier. |
| Name | The name of the packet loss instance. |
| MEP Index MEP idx | The index assigned to the Maintenance association End Point. |
| MEPID | The local Maintenance association End Point Identifier. |
| Remote MEPID R-MEPID | The remote Maintenance association End Point Identifier. Note: A peer MEP should have the sequence number enabled to allow a local MEP to perform CCM-based packet loss measurements. |
| Priority | The Priority value to be used in VLAN tags, if present, in the transmitted frame. Same as MEP's CCM priority. |
| Period | The number of periods that have elapsed since measurement started. The previous period is indicated in Period Time. Continuous Results in the section below gives the packet loss since the last time the statistics were cleared. |
| Period Time | The time when the current period results were moved to the previous period results. |
| Packet Loss Alarm) | Indicates if an alarm is raised (Active) because the number of packets lost, for the current period, is greater that the packet loss threshold. |
| Packet Loss Ratio Loss % | Packet loss ratio expressed as a percentage |
| Nbr Packets | Number of expected packets during the reference period. This should normally correspond to the reference period divided by the interval unless the period is incomplete. |
| Nbr Packets Lost | Number of packets lost during the period. For the current period, it is a continuous value that is not set to zero at the beginning of the period. The current period counter is organized as FIFO where a new packet loss result is put into the start and the oldest packet loss result is removed at each interval. |
| Nbr Gaps | The total number of gaps that have been detected from the sequence of packets that were received during the interval. This counter is reset to zero at the beginning of each period. |
| Largest Gap Size Largest Gap | The longest uninterrupted sequence of missing packets that was detected during the period. This counter is reset to zero at the beginning of each period. |
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