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
Modification
Release
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)