overhead (SONET path)
To set the SONET path overhead bytes in the frame header to a specific standards requirement or to ensure
interoperability with equipment from another vendor, use the overhead command in SONET/SDH path
configuration mode. To remove the setting of the SONET path overhead bytes from the configuration file
and restore the system to its default condition, use the no form of this command.
overhead {c2 byte-value| expected-trace LINEascii-text| j1 ascii-value}
no overhead {c2 byte-value| expected-trace LINEascii-text| j1 ascii-value}
Syntax Description
Specifies Synchronous Transport Signal (STS) synchronous payload envelope (SPE)
content (C2) byte. The transmitted c2 value is automatically set to 0xCF for unscrambled
payload and 0x16 for scrambled payload. If c2 is configured to a user-specified value,
the user-specified value is always applied regardless of scrambling.
Replace the byte-value argument with the byte value to which the c2 keyword should be
set. Range is from 0 to 255. Default value is 0.
c2 byte-value
Configures the SONET path trace (j1) buffer.
Replace the ascii-value argument with a text string that describes the SONET path trace
buffer. Default is a 64-byte path trace ASCII message, which includes default information
such as router name, (Layer 2 —POS ) interface name, and IP address, if applicable.
j1 ascii-value
Configures the SONET/SDH path trace. The trace monitoring feature allows a node to
perform trace monitoring by using the SONET/SDH capabilities.
Replace the LINE with the expected trace message
Replace the ascii-text argument with a text string that describes the SONET path trace
buffer. Default is a 64-byte path trace ASCII message, which includes default information
such as router name, (Layer 2 —POS ) interface name, and IP address, if applicable.
the LINE is the expected trace message which should match else ptim mismatch would
be reported
expected-trace
LINE ascii-text
Command Default
byte-value: 0xCF
byte-value: 0
Command Modes
SONET/SDH path configuration
Command History
ModificationRelease
This command was introduced.Release 3.9.0
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Release 5.3.x
878
SONET Controller Commands on the Cisco ASR 9000 Series Router
overhead (SONET path)
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