This option allows you to turn broadcast listening off for this port.
Using -sb 0 is the same as specifying BroadcastListener=NO on TCP/IP.
If broadcast listening is off, then the database server does not respond to UDP broadcasts. This means that clients must use
either the HOST= TCP protocol option to specify the hostname of the database server, or register the database server with
LDAP and use LDAP on the clients to find the database server. This also means that the dblocate utility does not include the
database server in its output.