How to enable b2b_idc_transport.log

The below two tip.properties used to control the transport logs,

For External Delivery Channel :
oracle.tip.adapter.b2b.transportTraceLogLevel

For Internal Delivery Channel :
oracle.tip.adapter.b2b.appTransportTraceLogLevel

The possible values could be,
WARNING | STATUS | DEBUG | ERROR

For backward compatibility, we have made assumption that if old properties
are defined, logLevel will be assumed to be DEBUG

The new Properties for Transport Logger overrides old properties.

If none of the properties (old and new) for Transport Logger is specified,
default log level is ERROR

The new transport log files will be created in the same directory in which
b2b log file is created.
Example: $ORACLE_HOME/ip/log/b2b

For Internal delivery channel b2b_idc_transport.log

For External delivery channel b2b_dc_transport.log