icf/dump_connection_info is a SAP Parameter attribute which is used to control information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
If you set this parameter (icf/dump_connection_info = 1),
additional information is written in the ICF trace.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.