Disabling the Control Word for Layer 2 VPNs
A 4-byte control word provides support for the emulated VC encapsulation for Layer 2 VPNs. This control word is added between the Layer 2 protocol data unit (PDU) being transported and the VC label that is used for demultiplexing. Various networking formats (ATM, Frame Relay, Ethernet, and so on) use the control word in a variety of ways.
On networks with equipment that does not support the control word, you can disable it by including the no-control-word statement. For a list of hierarchy levels at which you can configure this statement, see the statement summary section for this statement.
no-control-word;
For more information on configuring the control word, see Configuring the Control Word for Layer 2 Circuits and the JUNOS Feature Guide.
