Configuring SONET/SDH Header Byte Values

To configure values in SONET/SDH header bytes, include the bytes statement at the [edit interfaces interface-name sonet-options] hierarchy level:



[edit interfaces so-fpc/pic/port sonet-options]

bytes {
c2 value;
e1-quiet value;
f1 value;
f2 value;
s1 value;
z3 value;
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 routing platform 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.

Table 59 displays JUNOS software framing bytes for several specific speeds.

Table 59: SONET/SDH Framing Bytes for Specific Speeds

Overhead Bytes	STM4	STM16	STM64	OC12	OC48	OC192
A1	F6	F6	F6	F6	F6	F6
A2	28	28	28	28	28	28
C1	—	—	—	1..12	1..48	1..192
H1/H2	6A0A	6A0A	6A0A	620A	620A	620A
Z0	01/CC	01/CC	01/CC	—	—	—
Concatenated mode	93FF	93FF	93FF	93FF	93FF	93FF

When you configure SONET/SDH header bytes, note the following:

The C2 byte is the path signal label. If the C2 byte value on an interface does not match the C2 byte value on the remote interface, the path label mismatch (PLM-P) or unequipped (UNEQ-P) alarm might occur.
When you configure SONET/SDH OC48 interfaces for channelized (multiplexed) mode (by including the no-concatenate statement at the [edit chassis fpc slot-number pic pic-number] hierarchy level), the bytes f1 statement has no effect.
Currently, the bytes e1-quiet statement is ignored if you include it in the configuration.
The bytes f2, bytes z3, bytes z4, and path-trace options work correctly on channel 0 and work in the transmit direction only on channels 1, 2, and 3.
For DS3 channels on a channelized OC12 interface, the bytes f1, bytes f2, bytes z3, and bytes z4 options have no effect.
The bytes s1 option is supported only for channel 0; it is ignored if configured on channels 1 through 11. The bytes s1 value configured on channel 0 applies to all channels on the interface.
Embedded operations channel (EOC) D1, D2, and D3 bytes are not supported.