The TWAMP light function is not license-controlled.
Restrictions
If the FW has the UDP Flood function configured, TWAMP Light session statistics packets satisfying the UDP flood defense condition may be regarded as attack packets and discarded, causing the statistical result to be abnormal.
The FW supports the reflection of fragmented packets. If the FW receives fragmented session statistics packets, and the length of first fragments is smaller than the minimum length of reflection packets (69 bytes), the packets are discarded, causing the statistical result to be abnormal.
The UDP port number of a Responder must be an unused port number. For example, if local-port is 4500 and IPSec NAT traversal is configured, the TWAMP Light service will be abnormal.