IpAddress a, b, c, d, e, f, g, h, i, j, k;
@BeforeClass
public void setUp() throws Exception {
StackType type=Util.getIpStackType();
if(type == StackType.IPv6) {
a=new IpAddress("::1", 5555);
b=new IpAddress("::1", 5555);
d=new IpAddress("::1", 5556);
e=new IpAddress("::1", 5555);