Specifications

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Cisco MGX 8260 Command Line Interface Guide
Release 1.2, Part Number 78-10987-01 Rev. B0, January, 2002
Chapter 4 Service Management
Configuration Tasks for Lines
To view the information for all OC-3 lines, enter the lssonetlnerdis command. The system lists
summary E-RDI information for all OC-3 lines:
=======================================================================
Sonet Lines (lssonetlnerdis)
=======================================================================
Slot.Line Support Path SRDI
================= =================
9.1 disable
9.2 disable
For a description of the information, see the previous table.
Understanding E-RDI and Trace Parameters
Path and trace labels help identify particular SONET line. The trace label is a text string carried in a
16-byte or 32-byte message carried in the SONET overhead. The system alters or reserves some of the
bytes for synchronization or other purposes.
Using 16-Byte Messages
When using 16-byte messages, consider the following points:
• This message length only applies to SDH
• The system sets the most significant bit high of one byte for synchronization purposes. The position
of the altered byte in the message is defined by the trace id position parameter.
• Any printable or non-printable ASCII character is valid (00-7F hex).
• The system always sends 16 characters. If the user input is less than 16 characters, the system pads
the message with null characters (00 hex).
Using 64-Byte Messages
• The user can define a message of up to 62 bytes in length; the system automatically sets the last
two characters to a carriage return (OD hex) and line feed (OA hex).
• Any printable or non-printable ASCII character is valid (00-7F hex)
• The system always sends 64 characters. If the user input is less than 62 characters, the system pads
the message with null characters and then adds the carriage return and line feed.
Expected Received PTID Length The expected trace identifier length for the
SONET path:
• 16 bytes (SDH only)
• 64 bytes (SONET or SDH)
Expected Received Ptid Sync. pos. The position within a 16-byte message of the
synchronization byte
Expected ID The expected trace identifier in the SONET path
overhead
Received ID The actual trace identifier received
Displayed Information Description