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Junos OS Hierarchy Level

Junos OS Evolved Hierarchy Level


Enable the Two-Way Active Measurement Protocol (TWAMP) server for light control on the UDP port that reflects the test packets. If you want the default IANA port for TWAMP (862), you do not need to configure the port option. To complete the configuration for light control, you also need to configure the control-type light statement at either the Junos OS [edit services rpm twamp client control-connection control-connection-name] hierarchy level or the Junos OS Evolved [edit services monitoring twamp client control-connection control-connection-name] hierarchy level.

You configure the light statement because you want a stateless version of TWAMP where test parameters are predefined instead of negotiated. All test packets received by the server on a test port are reflected back and forgotten right away. If you want to have a stateful TWAMP server for Junos OS Evolved, you should configure the managed statement at the [edit services monitoring twamp server] hierarchy level instead. For Junos OS, if you want to have a stateful TWAMP server, do not configure the light statement for the TWAMP server, because managed mode is the default. Because TWAMP light servers are stateless, information about them is not included in the output of the show services rpm twamp server connection (Junos OS) or the show services monitoring twamp server control-info (Junos OS Evolved) operational mode command; only information about managed servers is included.


port number

Specify the UDP port that reflects the TWAMP test packets.

  • Range: You can specify any port from 862 through 65535.

  • Default: 862 (IANA port for TWAMP)

Required Privilege Level

system—To view this statement in the configuration.

system-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Evolved 20.3R1.

Support added in Junos OS Release 21.1R1.