Statement introduced in Junos OS Release 8.3.
Insert (for sending traffic) or strip (for receiving traffic) a null control word in MPLS packets when an MPLS Layer 2 circuit is configured with cell transport mode on a router running Junos OS Release 8.3 or later. When cell relay transport mode is configured, the use-null-cw statement allows interoperability between routers running Junos OS Release 8.2 and earlier and those running Junos OS Release 8.3 and later.
The use-null-cw statement is supported only on routers running Junos OS Release 8.3 or later.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.