c.DnsLookupFamily = cluster.Cluster_V4_ONLY
		} else if networkutil.AllIPv6(cb.proxyIPAddresses) {
			// IPv6 only
			c.DnsLookupFamily = cluster.Cluster_V6_ONLY
		} else {
			// Dual Stack
			if features.EnableDualStack {
				// using Cluster_ALL to enable Happy Eyeballsfor upstream connections
				c.DnsLookupFamily = cluster.Cluster_ALL
			} else {
				// keep the original logic if Dual Stack is disable

		UseOriginalDst:   proto.BoolTrue,
		FilterChains:     filterChains,
		TrafficDirection: core.TrafficDirection_OUTBOUND,
	}
	// add extra addresses for the listener
	if features.EnableDualStack && len(actualWildcards) > 1 {
		ipTablesListener.AdditionalAddresses = util.BuildAdditionalAddresses(actualWildcards[1:], uint32(lb.push.Mesh.ProxyListenPort))

			integIstioVersion := cMinIstioVersion
			var migrationApp echo.Instances
			// if dual stack is enabled, a dual stack echo config should be added
			if !t.Settings().EnableDualStack {
				// Create a custom echo deployment in NS1 with subsets that allows us to test the
				// migration of a workload to istio (from no sidecar to sidecar).
				migrationApp = deployment.New(t).

	}{
		{
			check: check.OK(),
			from:  apps.B,
			host:  "bar.example.com",
		},
		{
			check: check.NotOK(),
			from:  apps.B,
			host:  "bar",
		},
	}
	if t.Settings().EnableDualStack {
		additionalTestCases := []struct {
			check echo.Checker
			from  echo.Instances
			host  string
		}{
			// apps.D hosts a dual-stack service,
			// apps.E hosts an ipv6 only service and

		opts = append(opts,
			option.Localhost(option.LocalhostIPv6),
			option.Wildcard(option.WildcardIPv6),
			option.DNSLookupFamily(option.DNSLookupFamilyIPv6))
	} else {
		// Dual Stack
		if features.EnableDualStack {
			// If dual-stack, it may be [IPv4, IPv6] or [IPv6, IPv4]
			// So let the first ip family policy to decide its DNSLookupFamilyIP policy
			ipFamily, err := network.CheckIPFamilyTypeForFirstIPs(cfg.Metadata.InstanceIPs)

		return ""
	}
	return l.binds[0]
}

// Extra returns any additional bindings. This is always empty if dual stack is disabled
func (l listenerBinding) Extra() []string {
	if !features.EnableDualStack || len(l.binds) == 1 {
		return nil
	}
	return l.binds[1:]
}

type outboundListenerEntry struct {
	servicePort *model.Port

	bind listenerBinding

	locked   bool

					Labels:          svc.Attributes.Labels,
					Aliases:         svc.Attributes.Aliases,
					K8sAttributes:   svc.Attributes.K8sAttributes,
				},
			}
			if features.EnableDualStack {
				// cannot correctly build virtualHost domains for dual stack without ClusterVIPs
				servicesByName[svc.Hostname].ClusterVIPs = *svc.ClusterVIPs.DeepCopy()
			}
		}
	}

	}

	// Include all user-specified values and configuration options.
	if cfg.EnableCNI {
		args.AppendSet("components.cni.enabled", "true")
	}

	if ctx.Settings().EnableDualStack {
		args.AppendSet("values.pilot.env.ISTIO_DUAL_STACK", "true")
		args.AppendSet("meshConfig.defaultConfig.proxyMetadata.ISTIO_DUAL_STACK", "true")

		Name:                             name,
		Address:                          address,
		TrafficDirection:                 core.TrafficDirection_INBOUND,
		ContinueOnListenerFiltersTimeout: true,
	}
	if features.EnableDualStack && len(addresses) > 1 {
		// add extra addresses for the listener
		l.AdditionalAddresses = util.BuildAdditionalAddresses(addresses[1:], tPort)
	}
	if lb.node.Metadata.InboundListenerExactBalance {

				port.Number, builder.node.ID)
			continue
		}
		var extraBind []string
		bind := actualWildcards[0]
		if features.EnableDualStack && len(actualWildcards) > 1 {
			extraBind = actualWildcards[1:]
		}
		if len(port.Bind) > 0 {
			bind = port.Bind
			extraBind = nil
		}