Follow below steps to do mass rfc connection test

Goto SE38 -> RSRFCCHK,

Enter RFC destinations names (use wildchars)

Description of Fields in above reports:

• RFC destinations: Either provide RFC names or use a wildchar.
• Connection Type: Choose from below available connection types.
  • I Connection to Application Server with Same Database
  • 3 Connection to ABAP System
  • 2 Connection to R/2 System
  • T Start External Program Using TCP/IP
  • L Reference Entry (Refers to Other Destination)
  • S Start External Program Using SNA or APPC
  • X RFC Using Special ABAP Driver Routines
  • M CMC Connection
  • H HTTP Connection to ABAP System
  • G HTTP Connection to External Server