set enable_seqscan=off;
CREATE TABLE test_macaddr8 (
	i macaddr8
);
INSERT INTO test_macaddr8 VALUES
	( '22:00:5c:03:55:08:01:02' ),
	( '22:00:5c:04:55:08:01:02' ),
	( '22:00:5c:05:55:08:01:02' ),
	( '22:00:5c:08:55:08:01:02' ),
	( '22:00:5c:09:55:08:01:02' ),
	( '22:00:5c:10:55:08:01:02' )
;
CREATE INDEX idx_macaddr8 ON test_macaddr8 USING gin (i);
SELECT * FROM test_macaddr8 WHERE i<'22:00:5c:08:55:08:01:02'::macaddr8 ORDER BY i;
            i            
-------------------------
 22:00:5c:03:55:08:01:02
 22:00:5c:04:55:08:01:02
 22:00:5c:05:55:08:01:02
(3 rows)

SELECT * FROM test_macaddr8 WHERE i<='22:00:5c:08:55:08:01:02'::macaddr8 ORDER BY i;
            i            
-------------------------
 22:00:5c:03:55:08:01:02
 22:00:5c:04:55:08:01:02
 22:00:5c:05:55:08:01:02
 22:00:5c:08:55:08:01:02
(4 rows)

SELECT * FROM test_macaddr8 WHERE i='22:00:5c:08:55:08:01:02'::macaddr8 ORDER BY i;
            i            
-------------------------
 22:00:5c:08:55:08:01:02
(1 row)

SELECT * FROM test_macaddr8 WHERE i>='22:00:5c:08:55:08:01:02'::macaddr8 ORDER BY i;
            i            
-------------------------
 22:00:5c:08:55:08:01:02
 22:00:5c:09:55:08:01:02
 22:00:5c:10:55:08:01:02
(3 rows)

SELECT * FROM test_macaddr8 WHERE i>'22:00:5c:08:55:08:01:02'::macaddr8 ORDER BY i;
            i            
-------------------------
 22:00:5c:09:55:08:01:02
 22:00:5c:10:55:08:01:02
(2 rows)