if b.svc == nil || b.port == nil {
		return nil
	}

	// resolve policy from context
	destinationRule := corexds.CastDestinationRule(b.node.SidecarScope.DestinationRule(
		model.TrafficDirectionOutbound, b.node, b.svc.Hostname).GetRule())
	trafficPolicy, _ := util.GetPortLevelTrafficPolicy(destinationRule.GetTrafficPolicy(), b.port)

	// setup default cluster
	b.applyTrafficPolicy(defaultCluster, trafficPolicy)

	DestinationRule                = config.GroupVersionKind{Group: "networking.istio.io", Version: "v1alpha3", Kind: "DestinationRule"}
	DestinationRule_v1beta1        = config.GroupVersionKind{Group: "networking.istio.io", Version: "v1beta1", Kind: "DestinationRule"}
	DestinationRule_v1             = config.GroupVersionKind{Group: "networking.istio.io", Version: "v1", Kind: "DestinationRule"}

	}
}

// DestinationRule returns a destinationrule for a svc.
func (sc *SidecarScope) DestinationRule(direction TrafficDirection, proxy *Proxy, svc host.Name) *ConsolidatedDestRule {
	destinationRules := sc.destinationRules[svc]
	var catchAllDr *ConsolidatedDestRule
	for _, destRule := range destinationRules {
		destinationRule := destRule.rule.Spec.(*networking.DestinationRule)

	"istio.io/istio/pkg/test/framework"
	"istio.io/istio/pkg/test/framework/components/echo"
	"istio.io/istio/pkg/test/framework/components/echo/check"
)

// TestDestinationRuleTls tests that MUTUAL tls mode is respected in DestinationRule.
// This sets up a client and server with appropriate cert config and ensures we can successfully send a message.
func TestDestinationRuleTls(t *testing.T) {
	framework.
		NewTest(t).
		Run(func(t framework.TestContext) {

				clusters = append(clusters, cb.buildWaypointInboundVIPCluster(proxy, svc, *port, "http").build())
			}
			cfg := cb.sidecarScope.DestinationRule(model.TrafficDirectionInbound, proxy, svc.Hostname).GetRule()
			if cfg != nil {
				destinationRule := cfg.Spec.(*networking.DestinationRule)
				for _, ss := range destinationRule.Subsets {
					if port.Protocol.IsUnsupported() || port.Protocol.IsTCP() {

apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: originate-tls-for-external-svc
spec:
  host: {{ .EgressGatewayServiceName | default "istio-egressgateway" }}.{{ .EgressGatewayServiceNamespace | default "istio-system" }}.svc.cluster.local
  subsets:
  - name: originate-tls-for-plain-traffic
    trafficPolicy:
      tls:
        mode: SIMPLE
        sni: external.{{ .externalNamespace }}.svc.cluster.local

	"istio.io/istio/pkg/config/analysis/analyzers/authz"
	"istio.io/istio/pkg/config/analysis/analyzers/deployment"
	"istio.io/istio/pkg/config/analysis/analyzers/deprecation"
	"istio.io/istio/pkg/config/analysis/analyzers/destinationrule"
	"istio.io/istio/pkg/config/analysis/analyzers/envoyfilter"
	"istio.io/istio/pkg/config/analysis/analyzers/externalcontrolplane"
	"istio.io/istio/pkg/config/analysis/analyzers/gateway"

		services = append(services, proxy.SidecarScope.ServicesForHostname(host.Name(dr.Host))...)
	} else {
		dr := cfg.Spec.(*networking.DestinationRule)
		// Destinationrule was updated. Find matching services from updated destinationrule.
		services = append(services, proxy.SidecarScope.ServicesForHostname(host.Name(dr.Host))...)

	}.MustBuild()

	DestinationRule = resource.Builder{
		Identifier: "DestinationRule",
		Group:      "networking.istio.io",
		Kind:       "DestinationRule",
		Plural:     "destinationrules",
		Version:    "v1alpha3",
		VersionAliases: []string{
			"v1beta1",
			"v1",
		},
		Proto: "istio.networking.v1alpha3.DestinationRule", StatusProto: "istio.meta.v1alpha1.IstioStatus",

    is enabled by default. This means SNI will be set automatically based on the downstream HTTP host/authority header if `DestinationRule` does not explicitly set the same.