diff --git a/k8sclient/k8sclient.go b/k8sclient/k8sclient.go
index 400dfb361..4d219498d 100644
--- a/k8sclient/k8sclient.go
+++ b/k8sclient/k8sclient.go
@@ -232,6 +232,10 @@ func parsePodNetworkAnnotation(podNetworks, defaultNamespace string) ([]*types.N
 		if net.Namespace == "" {
 			net.Namespace = defaultNamespace
 		}
+		// compatibility pre v3.2, will be removed in v4.0
+		if net.ObsolatedInterfaceRequest != "" && net.InterfaceRequest == "" {
+			net.InterfaceRequest = net.ObsolatedInterfaceRequest
+		}
 	}
 
 	return networks, nil
diff --git a/types/conf.go b/types/conf.go
index 6180956b7..88c95a4a3 100644
--- a/types/conf.go
+++ b/types/conf.go
@@ -330,42 +330,3 @@ func CheckSystemNamespaces(namespace string, systemNamespaces []string) bool {
 	}
 	return false
 }
-
-// UnmarshalJSON unmarshal Network Selection Annotation. This also supports
-// the deprecated "interfaceRequest" property.
-func (net *NetworkSelectionElement) UnmarshalJSON(bytes []byte) error {
-	var networkSelectionMap map[string]string
-
-	if err := json.Unmarshal(bytes, &networkSelectionMap); err != nil {
-		return err
-	}
-
-	if name, ok := networkSelectionMap["name"]; ok {
-		net.Name = name
-	} else {
-		return logging.Errorf(`UnmarshalJSON(): "name" was not provided`)
-	}
-
-	if namespace, ok := networkSelectionMap["namespace"]; ok {
-		net.Namespace = namespace
-	}
-
-	if ips, ok := networkSelectionMap["ips"]; ok {
-		net.IPRequest = ips
-	}
-
-	if mac, ok := networkSelectionMap["mac"]; ok {
-		net.MacRequest = mac
-	}
-
-	// compatibility pre v3.2
-	if ifName, ok := networkSelectionMap["interfaceRequest"]; ok {
-		net.InterfaceRequest = ifName
-	}
-
-	if ifName, ok := networkSelectionMap["interface"]; ok {
-		net.InterfaceRequest = ifName
-	}
-
-	return nil
-}
diff --git a/types/conf_test.go b/types/conf_test.go
index 0a6e67db9..07885b3af 100644
--- a/types/conf_test.go
+++ b/types/conf_test.go
@@ -467,49 +467,4 @@ var _ = Describe("config operations", func() {
 
 		Expect(err).To(HaveOccurred())
 	})
-
-	Context("using UnmarshalJSON", func() {
-		It("succeeds with valid json", func() {
-			networkselectionelement := &NetworkSelectionElement{
-				Name:             "kube-system",
-				Namespace:        "net1",
-				InterfaceRequest: "",
-			}
-			conf := `{
-	"name": "kube-system",
-	"namespace": "net1",
-	"interfaceRequest": "",
-	"ips": "10.18.89.129",
-	"mac": "CB-32-97-FF-D6-79",
-	"interface": ""
-}`
-			err := networkselectionelement.UnmarshalJSON([]byte(conf))
-			Expect(err).NotTo(HaveOccurred())
-		})
-
-		It("fails to parse invalid json", func() {
-			networkselectionelement := &NetworkSelectionElement{
-				Name:             "kube-system",
-				Namespace:        "net1",
-				InterfaceRequest: "",
-			}
-			err := networkselectionelement.UnmarshalJSON([]byte("invalidjson~"))
-			Expect(err).To(HaveOccurred())
-		})
-
-		It("fails with missing name parameter", func() {
-			networkselectionelement := &NetworkSelectionElement{
-				Name:             "kube-system",
-				Namespace:        "net1",
-				InterfaceRequest: "",
-			}
-			// conf json does not include "name"
-			conf := `{
-	"namespace": "net1",
-	"interfaceRequest": ""
-}`
-			err := networkselectionelement.UnmarshalJSON([]byte(conf))
-			Expect(err).To(HaveOccurred())
-		})
-	})
 })
diff --git a/types/types.go b/types/types.go
index 91d716e7a..02321d82e 100644
--- a/types/types.go
+++ b/types/types.go
@@ -140,6 +140,9 @@ type NetworkSelectionElement struct {
 	// InterfaceRequest contains an optional requested name for the
 	// network interface this attachment will create in the container
 	InterfaceRequest string `json:"interface,omitempty"`
+	// ObsoateInterfaceRequest is obsolated parameter at pre 3.2.
+	// This will be removed in 4.0 release.
+	ObsolatedInterfaceRequest string `json:"interfaceRequest,omitempty"`
 }
 
 // K8sArgs is the valid CNI_ARGS used for Kubernetes