{
			name: "graceful delete, no connections results in deleting the real server immediatetly",
			vs: &utilipvs.VirtualServer{
				Address:  netutils.ParseIPSloppy("1.1.1.1"),
				Protocol: "tcp",
				Port:     uint16(80),
			},
			rs: &utilipvs.RealServer{
				Address:      netutils.ParseIPSloppy("10.0.0.1"),
				Port:         uint16(80),
				Weight:       100,
				ActiveConn:   0,
				InactiveConn: 0,
			},

				Weight:          1,
				Address:         netutils.ParseIPSloppy("1.2.3.4"),
			},
			RealServer{
				Address: netutils.ParseIPSloppy("1.2.3.4"),
				Port:    54321,
				Weight:  1,
			},
		},
		{
			libipvs.Destination{
				Port:            53,
				ConnectionFlags: 0,
				Weight:          1,
				Address:         netutils.ParseIPSloppy("2002::cafe"),
			},
			RealServer{

					addrs: []net.Addr{
						&net.IPNet{IP: netutils.ParseIPSloppy("1.2.3.4"), Mask: net.CIDRMask(30, 32)},
						&net.IPNet{IP: netutils.ParseIPSloppy("2001:db8::1"), Mask: net.CIDRMask(64, 128)},
					},
				},
				{
					itf: net.Interface{Index: 1, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0},
					addrs: []net.Addr{
						&net.IPNet{IP: netutils.ParseIPSloppy("127.0.0.1"), Mask: net.CIDRMask(8, 32)},

		testOptions *ServerRunOptions
		expectErr   string
	}{
		{
			name: "Test when MaxRequestsInFlight is negative value",
			testOptions: &ServerRunOptions{
				AdvertiseAddress:            netutils.ParseIPSloppy("192.168.10.10"),
				CorsAllowedOriginList:       []string{"10.10.10.100", "10.10.10.200"},
				MaxRequestsInFlight:         -400,
				MaxMutatingRequestsInFlight: 200,

	upIntf       = makeIntf(1, "eth3", flagUp)
)

var (
	ipv4Route = Route{Interface: "eth3", Destination: netutils.ParseIPSloppy("0.0.0.0"), Gateway: netutils.ParseIPSloppy("10.254.0.1"), Family: familyIPv4}
	ipv6Route = Route{Interface: "eth3", Destination: netutils.ParseIPSloppy("::"), Gateway: netutils.ParseIPSloppy("2001:1::1"), Family: familyIPv6}
)

var (
	noRoutes   = []Route{}
	routeV4    = []Route{ipv4Route}

		allocator, err := r.getAllocator(netutils.ParseIPSloppy("10.0.0.11"))
		if err != nil {
			return false, nil
		}
		allocator.ipAddressSynced = func() bool { return true }
		return allocator.ready.Load(), nil
	})
	if err != nil {
		t.Fatal(err)
	}
	// allocate one IP from the new allocator
	err = r.Allocate(netutils.ParseIPSloppy("10.0.0.11"))
	if err != nil {

		}
		if !after.Has(netutils.ParseIPSloppy("192.168.1.10")) {
			t.Errorf("expected ipallocator to still have leaked IP")
		}
	}
	// Run one more time to actually remove the leak.
	if err := r.runOnce(); err != nil {
		t.Fatal(err)
	}
	after, err := ipallocator.NewFromSnapshot(ipregistry.updated)
	if err != nil {
		t.Fatal(err)
	}
	if after.Has(netutils.ParseIPSloppy("192.168.1.10")) {

				t.Fatal(err)
			}
			for _, outOfRange := range tc.outOfRange {
				err = r.Allocate(netutils.ParseIPSloppy(outOfRange))
				if _, ok := err.(*ErrNotInRange); !ok {
					t.Fatal(err)
				}
			}
			if err := r.Allocate(netutils.ParseIPSloppy(tc.alreadyAllocated)); err != ErrAllocated {
				t.Fatal(err)
			}
			if f := r.Free(); f != 1 {

				t.Fatal(err)
			}
			for _, outOfRange := range tc.outOfRange {
				err = r.Allocate(netutils.ParseIPSloppy(outOfRange))
				if err == nil {
					t.Fatalf("unexpacted allocating of %s", outOfRange)
				}
			}
			if err := r.Allocate(netutils.ParseIPSloppy(tc.alreadyAllocated)); err == nil {
				t.Fatalf("unexpected allocation of %s", tc.alreadyAllocated)
			}
			if f := r.Free(); f != 1 {

			rawNodeIPs: []net.IP{
				netutils.ParseIPSloppy("90.90.90.90"),
				netutils.ParseIPSloppy("2001:db8::2"),
			},
			bindAddress:    "::",
			expectedFamily: v1.IPv4Protocol,
			expectedIPv4:   "90.90.90.90",
			expectedIPv6:   "2001:db8::2",
		},
		{
			name: "Dual stack, primary IPv6",
			rawNodeIPs: []net.IP{
				netutils.ParseIPSloppy("2001:db8::2"),
				netutils.ParseIPSloppy("90.90.90.90"),