Configuring IP FPM Hop-by-Hop Performance Statistics Collection
IP Flow Performance Measurement (FPM) hop-by-hop performance statistics collection helps locate faulty nodes when packet loss or delay occurs.
Usage Scenario
- When a target flow is unidirectional, you can directly implement hop-by-hop performance statistics collection for the flow.
- When a target flow is bidirectional, two situations are available:
- If the target flow is symmetrical, you can implement hop-by-hop performance statistics collection for the forward or backward flow, and the measurement is the same either way.
- If the target flow is asymmetrical, you must implement hop-by-hop performance statistics collection for both the forward and backward flows to obtain their respective measurements.
These measurements serve as a reliable reference for network operation and maintenance and fault diagnosis, improving network reliability and user experience.
Pre-configuration Tasks
Before configuring IP FPM hop-by-hop performance statistics collection, complete the following tasks:
Configure a dynamic routing protocol or static routes so that devices are reachable at the network layer.
Configure the network time protocol (NTP) or 1588v2 so that all device clocks can be synchronized.
Compared with NTP, 1588v2 implements inter-device clock synchronization with higher precision. To obtain accurate performance statistics, it is recommended that 1588v2 be deployed to implement clock synchronization between all devices with clocks when you use IP FPM for performance measurement, especially for one-way delay measurement.
- Configuring an MCP
- A Measurement Control Point (MCP) collects statistics reported by Data Collecting Points (DCPs), summarizes and calculates the statistics, and reports measurement results to user terminals or the network management system (NMS).
- Configuring a DCP
- A Data Collecting Point (DCP) manages and controls Target Logical Ports (TLPs), collects statistics generated by TLPs, and reports the statistics to a Measurement Control Point (MCP).
- Checking the Configurations
- After configuring the MCP, DCPs, and TLPs, check the IP FPM hop-by-hop performance statistics collection function.