IpAddress ip1=new IpAddress(1111), ip2=new IpAddress(2222);
cons_d.add(ip1, 1, 10, 10);
cons_d.add(ip2, 2, 20, 20);
// System.out.println("\ncons_d before: " + cons_d);
cons_d.merge(d);
assertEquals(5, cons_d.size());
//System.out.println("\ncons_d after: " + cons_d);
assertEquals(1, cons_d.lowSeqnoAt(ip1));
assertEquals(2, cons_d.lowSeqnoAt(ip2));