Hi John,
Have you checked if telnet is working on port 1521? Also try "tnsping SB1" and try connecting to the instance through listener via sqlplus sapsr3@SB1, then supply the password. Also try to restart the listener.
Hi John,
Have you checked if telnet is working on port 1521? Also try "tnsping SB1" and try connecting to the instance through listener via sqlplus sapsr3@SB1, then supply the password. Also try to restart the listener.