B<oping> [B<-4> | B<-6>] [B<-c> I<count>] [B<-i> I<interval>] I<host> [I<host> [I<host> ...]]
+B<oping> [B<-4> | B<-6>] [B<-c> I<count>] [B<-i> I<interval>] B<-f> I<filename>
+
=head1 DESCRIPTION
oping uses ICMPv4 or ICMPv6 ECHO_REQUEST packets to measure a hosts
=item B<-6>
-Force the use of IPv6
+Force the use of IPv6.
=item B<-c> I<count>
=item B<-I> I<address>
-Set the source address to use. You B<cannot> pass the interface name, as you
-can with GNU's L<ping(8)>.
+Set the source address to use. You may either specify an IP number or a
+hostname. You B<cannot> pass the interface name, as you can with GNU's
+L<ping(8)> - use the B<-D> option for that purpose.
+
+=item B<-D> I<interface name>
+
+Set the outgoing network device to use.
+
+=item B<-f> I<filename>
+
+Instead of specifying hostnames on the command line, read them from
+I<filename>. If I<filename> is B<->, read from C<STDIN>.
=back