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Hierarchy Level

Release Information

Statement introduced before Junos OS Release 7.4.


Set values in some SONET/SDH header bytes.


c2 value—Path signal label SONET/SDH overhead byte. SONET/SDH frames use the C2 byte to indicate the contents of the payload inside the frame. SONET/SDH interfaces use the C2 byte to indicate whether the payload is scrambled.

Range: 0 through 255

Default: 0xCF

e1-quiet value—Default idle byte sent on the orderwire SONET/SDH overhead bytes. The router does not support the orderwire channel, and hence sends this byte continuously.

Range: 0 through 255

Default: 0x7F

f1 value, f2 value, z3 value, z4 value—SONET/SDH overhead bytes.

Range: 0 through 255

Default: 0x00

s1 value—Synchronization message SONET overhead byte. This byte is normally controlled as a side effect of the system reference clock configuration and the state of the external clock coming from an interface if the system reference clocks have been configured to use an external reference.

Range: 0 through 255

Default: 0xCC

Required Privilege Level

interface—To view this statement in the configuration.

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