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Configuring SONET/SDH Header Byte Values to Identify Error Conditions


To configure the values in SONET/SDH header bytes:

  1. In configuration mode, go to the [edit interfaces interface-name sonet-options] hierarchy level.
  2. Configure the bytes option to set values in some SONET/SDH header bytes. You can configure this option with c2 value, e1-quiet value f1 value, f2 value, s1 value, z3 value, and z4 value.

You can configure the following SONET/SDH header bytes:

  • c2—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. For the c2 byte, value can be from 0 through 255. The default value is 0xCF.

  • e1-quiet—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.

  • f1, f2, z3, z4—SONET/SDH overhead bytes. For these bytes, value can be from 0 through 255. The default value is 0x00.

  • s1—Synchronization message SONET/SDH 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. For the s1 byte, value can be from 0 through 255.