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control-word (Protocols Layer 2 Circuit Neighbor)


Hierarchy Level


Specify the control word. The control word is four bytes long and is inserted between the Layer 2 protocol data unit (PDU) being transported and the virtual circuit (VC) label that is used for demultiplexing.


control-word—Enable the use of the control word.

  • Default: A null control word is enabled by default. You can also configure the control word explicitly using the control-word statement.

no-control-word—Disable the use of the control word.

Required Privilege Level

routing—To view this statement in the configuration.

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

Release Information

Statement introduced before Junos OS Release 7.4.