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Licensing Requirements and Limitations for IP FPM
Involved Network Elements
None
Licensing Requirements
IP FPM is a basic feature of a router and is not under license control.
Feature Limitations
IP FPM depends on NTP clock synchronization. If clocks are not synchronized, statistics cannot be collected or the statistical result is abnormal.
IP FPM does not support the SD-WAN solution in which double gateways and three upstream WAN ports are deployed.
IP FPM delay measurement is not reliable. When the packet loss rate on a link is high, there is a possibility that the detection result is inaccurate.
In the SD-WAN solution, IP FPM detection result can be reported to the SPR. It takes more than 20s to report detection results for the first time.