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Configuring the Signal Label
The Signal Label field occupies one byte (C2) of the Path Overhead associated with each
SONET frame. It is used to indicate the type of contents carried in the Synchronous
Payload Envelope (SPE). For example, 0x16 indicates scrambled PPP/HDLC, while
0xCF indicates unscrambled PPP/HDLC.
To configure the C2 Signal Label value for the specified SONET port, use the following
command:
config sonet signal label [auto | <hex_octet>] ports <portlist>
The
value
may be necessary to specify a particular Signal Label value in order to interoperate with
implementations that do not follow the standard conventions for the Signal Label field.
To determine whether you need to specify a particular Signal Label value, perform the
following tasks:
1 Use the
2 Look for a Path Payload Label Mismatch (PLM-P) event indicating that the received
payload type does not match the expected payload.
3 Compare the contents of the received C2 field (Signal Label value) with the contents
of the transmitted C2 field.
If no Signal Label value is specified, the command defaults to
value of the Signal Label field to be set automatically based on standard conventions for
the given payload type.
The following command example sets the Signal Label to the hexadecimal value CF for
port 1 of the PoS module installed in slot 8 of the BlackDiamond switch.
config sonet signal label CF ports 8:1
Resetting SONET Configuration Parameter Values
To reset the SONET configuration parameters for the specified SONET ports to their
default values, use the following command:
unconfig sonet ports <portlist>
Packet Over SONET Module Installation and User Guide
parameter is specified as a hexadecimal integer in the range from 00 to FF. It
command to display SONET port status information.
show sonet
Configuring and Monitoring SONET Ports
, which causes the
auto
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