diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/DefaultAction.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/DefaultAction.java
new file mode 100644
index 0000000000000..442aea8a23e9c
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/DefaultAction.java
@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview;
+
+import java.util.Collection;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.microsoft.rest.ExpandableStringEnum;
+
+/**
+ * Defines values for DefaultAction.
+ */
+public final class DefaultAction extends ExpandableStringEnum<DefaultAction> {
+    /** Static value Allow for DefaultAction. */
+    public static final DefaultAction ALLOW = fromString("Allow");
+
+    /** Static value Deny for DefaultAction. */
+    public static final DefaultAction DENY = fromString("Deny");
+
+    /**
+     * Creates or finds a DefaultAction from its string representation.
+     * @param name a name to look for
+     * @return the corresponding DefaultAction
+     */
+    @JsonCreator
+    public static DefaultAction fromString(String name) {
+        return fromString(name, DefaultAction.class);
+    }
+
+    /**
+     * @return known DefaultAction values
+     */
+    public static Collection<DefaultAction> values() {
+        return values(DefaultAction.class);
+    }
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NWRuleSetIpRules.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NWRuleSetIpRules.java
new file mode 100644
index 0000000000000..df670d2e1c0d5
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NWRuleSetIpRules.java
@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * The response from the List namespace operation.
+ */
+public class NWRuleSetIpRules {
+    /**
+     * IP Mask.
+     */
+    @JsonProperty(value = "ipMask")
+    private String ipMask;
+
+    /**
+     * The IP Filter Action. Possible values include: 'Allow'.
+     */
+    @JsonProperty(value = "action")
+    private NetworkRuleIPAction action;
+
+    /**
+     * Get iP Mask.
+     *
+     * @return the ipMask value
+     */
+    public String ipMask() {
+        return this.ipMask;
+    }
+
+    /**
+     * Set iP Mask.
+     *
+     * @param ipMask the ipMask value to set
+     * @return the NWRuleSetIpRules object itself.
+     */
+    public NWRuleSetIpRules withIpMask(String ipMask) {
+        this.ipMask = ipMask;
+        return this;
+    }
+
+    /**
+     * Get the IP Filter Action. Possible values include: 'Allow'.
+     *
+     * @return the action value
+     */
+    public NetworkRuleIPAction action() {
+        return this.action;
+    }
+
+    /**
+     * Set the IP Filter Action. Possible values include: 'Allow'.
+     *
+     * @param action the action value to set
+     * @return the NWRuleSetIpRules object itself.
+     */
+    public NWRuleSetIpRules withAction(NetworkRuleIPAction action) {
+        this.action = action;
+        return this;
+    }
+
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NWRuleSetVirtualNetworkRules.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NWRuleSetVirtualNetworkRules.java
new file mode 100644
index 0000000000000..e549780547d4a
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NWRuleSetVirtualNetworkRules.java
@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * The response from the List namespace operation.
+ */
+public class NWRuleSetVirtualNetworkRules {
+    /**
+     * Subnet properties.
+     */
+    @JsonProperty(value = "subnet")
+    private Subnet subnet;
+
+    /**
+     * Value that indicates whether to ignore missing Vnet Service Endpoint.
+     */
+    @JsonProperty(value = "ignoreMissingVnetServiceEndpoint")
+    private Boolean ignoreMissingVnetServiceEndpoint;
+
+    /**
+     * Get subnet properties.
+     *
+     * @return the subnet value
+     */
+    public Subnet subnet() {
+        return this.subnet;
+    }
+
+    /**
+     * Set subnet properties.
+     *
+     * @param subnet the subnet value to set
+     * @return the NWRuleSetVirtualNetworkRules object itself.
+     */
+    public NWRuleSetVirtualNetworkRules withSubnet(Subnet subnet) {
+        this.subnet = subnet;
+        return this;
+    }
+
+    /**
+     * Get value that indicates whether to ignore missing Vnet Service Endpoint.
+     *
+     * @return the ignoreMissingVnetServiceEndpoint value
+     */
+    public Boolean ignoreMissingVnetServiceEndpoint() {
+        return this.ignoreMissingVnetServiceEndpoint;
+    }
+
+    /**
+     * Set value that indicates whether to ignore missing Vnet Service Endpoint.
+     *
+     * @param ignoreMissingVnetServiceEndpoint the ignoreMissingVnetServiceEndpoint value to set
+     * @return the NWRuleSetVirtualNetworkRules object itself.
+     */
+    public NWRuleSetVirtualNetworkRules withIgnoreMissingVnetServiceEndpoint(Boolean ignoreMissingVnetServiceEndpoint) {
+        this.ignoreMissingVnetServiceEndpoint = ignoreMissingVnetServiceEndpoint;
+        return this;
+    }
+
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/Namespaces.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/Namespaces.java
index e0d565252a107..5cd16f9d63fd7 100644
--- a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/Namespaces.java
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/Namespaces.java
@@ -20,6 +20,7 @@
 import com.microsoft.azure.management.eventhub.v2018_01_01_preview.IpFilterRule;
 import rx.Completable;
 import com.microsoft.azure.management.eventhub.v2018_01_01_preview.VirtualNetworkRule;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation.NetworkRuleSetInner;
 
 /**
  * Type representing Namespaces.
@@ -103,4 +104,25 @@ public interface Namespaces extends SupportsCreating<EHNamespace.DefinitionStage
      */
     Completable deleteVirtualNetworkRuleAsync(String resourceGroupName, String namespaceName, String virtualNetworkRuleName);
 
+    /**
+     * Create or update NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @param parameters The Namespace IpFilterRule.
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @return the observable for the request
+     */
+    Observable<NetworkRuleSet> createOrUpdateNetworkRuleSetAsync(String resourceGroupName, String namespaceName, NetworkRuleSetInner parameters);
+
+    /**
+     * Gets NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @return the observable for the request
+     */
+    Observable<NetworkRuleSet> getNetworkRuleSetAsync(String resourceGroupName, String namespaceName);
+
 }
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleIPAction.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleIPAction.java
new file mode 100644
index 0000000000000..007eccc43f24f
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleIPAction.java
@@ -0,0 +1,38 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview;
+
+import java.util.Collection;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.microsoft.rest.ExpandableStringEnum;
+
+/**
+ * Defines values for NetworkRuleIPAction.
+ */
+public final class NetworkRuleIPAction extends ExpandableStringEnum<NetworkRuleIPAction> {
+    /** Static value Allow for NetworkRuleIPAction. */
+    public static final NetworkRuleIPAction ALLOW = fromString("Allow");
+
+    /**
+     * Creates or finds a NetworkRuleIPAction from its string representation.
+     * @param name a name to look for
+     * @return the corresponding NetworkRuleIPAction
+     */
+    @JsonCreator
+    public static NetworkRuleIPAction fromString(String name) {
+        return fromString(name, NetworkRuleIPAction.class);
+    }
+
+    /**
+     * @return known NetworkRuleIPAction values
+     */
+    public static Collection<NetworkRuleIPAction> values() {
+        return values(NetworkRuleIPAction.class);
+    }
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleSet.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleSet.java
new file mode 100644
index 0000000000000..2c0d133892d5e
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleSet.java
@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview;
+
+import com.microsoft.azure.arm.model.HasInner;
+import com.microsoft.azure.arm.resources.models.HasManager;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation.EventHubManager;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation.NetworkRuleSetInner;
+import java.util.List;
+
+/**
+ * Type representing NetworkRuleSet.
+ */
+public interface NetworkRuleSet extends HasInner<NetworkRuleSetInner>, HasManager<EventHubManager> {
+    /**
+     * @return the defaultAction value.
+     */
+    DefaultAction defaultAction();
+
+    /**
+     * @return the id value.
+     */
+    String id();
+
+    /**
+     * @return the ipRules value.
+     */
+    List<NWRuleSetIpRules> ipRules();
+
+    /**
+     * @return the name value.
+     */
+    String name();
+
+    /**
+     * @return the type value.
+     */
+    String type();
+
+    /**
+     * @return the virtualNetworkRules value.
+     */
+    List<NWRuleSetVirtualNetworkRules> virtualNetworkRules();
+
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleSets.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleSets.java
new file mode 100644
index 0000000000000..d9d379f063081
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/NetworkRuleSets.java
@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview;
+
+import com.microsoft.azure.arm.model.HasInner;
+import com.microsoft.azure.arm.resources.models.HasManager;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation.EventHubManager;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation.NetworkRuleSetsInner;
+import java.util.List;
+
+/**
+ * Type representing NetworkRuleSets.
+ */
+public interface NetworkRuleSets extends HasInner<NetworkRuleSetsInner>, HasManager<EventHubManager> {
+    /**
+     * @return the defaultAction value.
+     */
+    DefaultAction defaultAction();
+
+    /**
+     * @return the id value.
+     */
+    String id();
+
+    /**
+     * @return the ipRules value.
+     */
+    List<NWRuleSetIpRules> ipRules();
+
+    /**
+     * @return the name value.
+     */
+    String name();
+
+    /**
+     * @return the type value.
+     */
+    String type();
+
+    /**
+     * @return the virtualNetworkRules value.
+     */
+    List<NWRuleSetVirtualNetworkRules> virtualNetworkRules();
+
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/Subnet.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/Subnet.java
new file mode 100644
index 0000000000000..73766a300749a
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/Subnet.java
@@ -0,0 +1,43 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * Properties supplied for Subnet.
+ */
+public class Subnet {
+    /**
+     * Resource ID of Virtual Network Subnet.
+     */
+    @JsonProperty(value = "id")
+    private String id;
+
+    /**
+     * Get resource ID of Virtual Network Subnet.
+     *
+     * @return the id value
+     */
+    public String id() {
+        return this.id;
+    }
+
+    /**
+     * Set resource ID of Virtual Network Subnet.
+     *
+     * @param id the id value to set
+     * @return the Subnet object itself.
+     */
+    public Subnet withId(String id) {
+        this.id = id;
+        return this;
+    }
+
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NamespacesImpl.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NamespacesImpl.java
index a9547aef7b548..4c18803ec5d02 100644
--- a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NamespacesImpl.java
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NamespacesImpl.java
@@ -24,6 +24,7 @@
 import com.microsoft.azure.Page;
 import com.microsoft.azure.management.eventhub.v2018_01_01_preview.IpFilterRule;
 import com.microsoft.azure.management.eventhub.v2018_01_01_preview.VirtualNetworkRule;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NetworkRuleSet;
 
 class NamespacesImpl extends GroupableResourcesCoreImpl<EHNamespace, EHNamespaceImpl, EHNamespaceInner, NamespacesInner, EventHubManager>  implements Namespaces {
     protected NamespacesImpl(EventHubManager manager) {
@@ -251,4 +252,28 @@ public Completable deleteVirtualNetworkRuleAsync(String resourceGroupName, Strin
         return client.deleteVirtualNetworkRuleAsync(resourceGroupName, namespaceName, virtualNetworkRuleName).toCompletable();
     }
 
+    @Override
+    public Observable<NetworkRuleSet> createOrUpdateNetworkRuleSetAsync(String resourceGroupName, String namespaceName, NetworkRuleSetInner parameters) {
+        NamespacesInner client = this.inner();
+        return client.createOrUpdateNetworkRuleSetAsync(resourceGroupName, namespaceName, parameters)
+        .map(new Func1<NetworkRuleSetInner, NetworkRuleSet>() {
+            @Override
+            public NetworkRuleSet call(NetworkRuleSetInner inner) {
+                return new NetworkRuleSetImpl(inner, manager());
+            }
+        });
+    }
+
+    @Override
+    public Observable<NetworkRuleSet> getNetworkRuleSetAsync(String resourceGroupName, String namespaceName) {
+        NamespacesInner client = this.inner();
+        return client.getNetworkRuleSetAsync(resourceGroupName, namespaceName)
+        .map(new Func1<NetworkRuleSetInner, NetworkRuleSet>() {
+            @Override
+            public NetworkRuleSet call(NetworkRuleSetInner inner) {
+                return new NetworkRuleSetImpl(inner, manager());
+            }
+        });
+    }
+
 }
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NamespacesInner.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NamespacesInner.java
index d1707a6c63576..19417d46574aa 100644
--- a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NamespacesInner.java
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NamespacesInner.java
@@ -129,6 +129,14 @@ interface NamespacesService {
         @GET("subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventHub/namespaces/{namespaceName}/virtualnetworkrules/{virtualNetworkRuleName}")
         Observable<Response<ResponseBody>> getVirtualNetworkRule(@Path("resourceGroupName") String resourceGroupName, @Path("namespaceName") String namespaceName, @Path("virtualNetworkRuleName") String virtualNetworkRuleName, @Path("subscriptionId") String subscriptionId, @Query("api-version") String apiVersion, @Header("accept-language") String acceptLanguage, @Header("User-Agent") String userAgent);
 
+        @Headers({ "Content-Type: application/json; charset=utf-8", "x-ms-logging-context: com.microsoft.azure.management.eventhub.v2018_01_01_preview.Namespaces createOrUpdateNetworkRuleSet" })
+        @PUT("subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventHub/namespaces/{namespaceName}/networkRuleSets/default")
+        Observable<Response<ResponseBody>> createOrUpdateNetworkRuleSet(@Path("resourceGroupName") String resourceGroupName, @Path("namespaceName") String namespaceName, @Path("subscriptionId") String subscriptionId, @Query("api-version") String apiVersion, @Body NetworkRuleSetInner parameters, @Header("accept-language") String acceptLanguage, @Header("User-Agent") String userAgent);
+
+        @Headers({ "Content-Type: application/json; charset=utf-8", "x-ms-logging-context: com.microsoft.azure.management.eventhub.v2018_01_01_preview.Namespaces getNetworkRuleSet" })
+        @GET("subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.EventHub/namespaces/{namespaceName}/networkRuleSets/default")
+        Observable<Response<ResponseBody>> getNetworkRuleSet(@Path("resourceGroupName") String resourceGroupName, @Path("namespaceName") String namespaceName, @Path("subscriptionId") String subscriptionId, @Query("api-version") String apiVersion, @Header("accept-language") String acceptLanguage, @Header("User-Agent") String userAgent);
+
         @Headers({ "Content-Type: application/json; charset=utf-8", "x-ms-logging-context: com.microsoft.azure.management.eventhub.v2018_01_01_preview.Namespaces listNext" })
         @GET
         Observable<Response<ResponseBody>> listNext(@Url String nextUrl, @Header("accept-language") String acceptLanguage, @Header("User-Agent") String userAgent);
@@ -1787,6 +1795,186 @@ private ServiceResponse<VirtualNetworkRuleInner> getVirtualNetworkRuleDelegate(R
                 .build(response);
     }
 
+    /**
+     * Create or update NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @param parameters The Namespace IpFilterRule.
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @throws ErrorResponseException thrown if the request is rejected by server
+     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
+     * @return the NetworkRuleSetInner object if successful.
+     */
+    public NetworkRuleSetInner createOrUpdateNetworkRuleSet(String resourceGroupName, String namespaceName, NetworkRuleSetInner parameters) {
+        return createOrUpdateNetworkRuleSetWithServiceResponseAsync(resourceGroupName, namespaceName, parameters).toBlocking().single().body();
+    }
+
+    /**
+     * Create or update NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @param parameters The Namespace IpFilterRule.
+     * @param serviceCallback the async ServiceCallback to handle successful and failed responses.
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @return the {@link ServiceFuture} object
+     */
+    public ServiceFuture<NetworkRuleSetInner> createOrUpdateNetworkRuleSetAsync(String resourceGroupName, String namespaceName, NetworkRuleSetInner parameters, final ServiceCallback<NetworkRuleSetInner> serviceCallback) {
+        return ServiceFuture.fromResponse(createOrUpdateNetworkRuleSetWithServiceResponseAsync(resourceGroupName, namespaceName, parameters), serviceCallback);
+    }
+
+    /**
+     * Create or update NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @param parameters The Namespace IpFilterRule.
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @return the observable to the NetworkRuleSetInner object
+     */
+    public Observable<NetworkRuleSetInner> createOrUpdateNetworkRuleSetAsync(String resourceGroupName, String namespaceName, NetworkRuleSetInner parameters) {
+        return createOrUpdateNetworkRuleSetWithServiceResponseAsync(resourceGroupName, namespaceName, parameters).map(new Func1<ServiceResponse<NetworkRuleSetInner>, NetworkRuleSetInner>() {
+            @Override
+            public NetworkRuleSetInner call(ServiceResponse<NetworkRuleSetInner> response) {
+                return response.body();
+            }
+        });
+    }
+
+    /**
+     * Create or update NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @param parameters The Namespace IpFilterRule.
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @return the observable to the NetworkRuleSetInner object
+     */
+    public Observable<ServiceResponse<NetworkRuleSetInner>> createOrUpdateNetworkRuleSetWithServiceResponseAsync(String resourceGroupName, String namespaceName, NetworkRuleSetInner parameters) {
+        if (resourceGroupName == null) {
+            throw new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null.");
+        }
+        if (namespaceName == null) {
+            throw new IllegalArgumentException("Parameter namespaceName is required and cannot be null.");
+        }
+        if (this.client.subscriptionId() == null) {
+            throw new IllegalArgumentException("Parameter this.client.subscriptionId() is required and cannot be null.");
+        }
+        if (this.client.apiVersion() == null) {
+            throw new IllegalArgumentException("Parameter this.client.apiVersion() is required and cannot be null.");
+        }
+        if (parameters == null) {
+            throw new IllegalArgumentException("Parameter parameters is required and cannot be null.");
+        }
+        Validator.validate(parameters);
+        return service.createOrUpdateNetworkRuleSet(resourceGroupName, namespaceName, this.client.subscriptionId(), this.client.apiVersion(), parameters, this.client.acceptLanguage(), this.client.userAgent())
+            .flatMap(new Func1<Response<ResponseBody>, Observable<ServiceResponse<NetworkRuleSetInner>>>() {
+                @Override
+                public Observable<ServiceResponse<NetworkRuleSetInner>> call(Response<ResponseBody> response) {
+                    try {
+                        ServiceResponse<NetworkRuleSetInner> clientResponse = createOrUpdateNetworkRuleSetDelegate(response);
+                        return Observable.just(clientResponse);
+                    } catch (Throwable t) {
+                        return Observable.error(t);
+                    }
+                }
+            });
+    }
+
+    private ServiceResponse<NetworkRuleSetInner> createOrUpdateNetworkRuleSetDelegate(Response<ResponseBody> response) throws ErrorResponseException, IOException, IllegalArgumentException {
+        return this.client.restClient().responseBuilderFactory().<NetworkRuleSetInner, ErrorResponseException>newInstance(this.client.serializerAdapter())
+                .register(200, new TypeToken<NetworkRuleSetInner>() { }.getType())
+                .registerError(ErrorResponseException.class)
+                .build(response);
+    }
+
+    /**
+     * Gets NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @throws ErrorResponseException thrown if the request is rejected by server
+     * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
+     * @return the NetworkRuleSetInner object if successful.
+     */
+    public NetworkRuleSetInner getNetworkRuleSet(String resourceGroupName, String namespaceName) {
+        return getNetworkRuleSetWithServiceResponseAsync(resourceGroupName, namespaceName).toBlocking().single().body();
+    }
+
+    /**
+     * Gets NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @param serviceCallback the async ServiceCallback to handle successful and failed responses.
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @return the {@link ServiceFuture} object
+     */
+    public ServiceFuture<NetworkRuleSetInner> getNetworkRuleSetAsync(String resourceGroupName, String namespaceName, final ServiceCallback<NetworkRuleSetInner> serviceCallback) {
+        return ServiceFuture.fromResponse(getNetworkRuleSetWithServiceResponseAsync(resourceGroupName, namespaceName), serviceCallback);
+    }
+
+    /**
+     * Gets NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @return the observable to the NetworkRuleSetInner object
+     */
+    public Observable<NetworkRuleSetInner> getNetworkRuleSetAsync(String resourceGroupName, String namespaceName) {
+        return getNetworkRuleSetWithServiceResponseAsync(resourceGroupName, namespaceName).map(new Func1<ServiceResponse<NetworkRuleSetInner>, NetworkRuleSetInner>() {
+            @Override
+            public NetworkRuleSetInner call(ServiceResponse<NetworkRuleSetInner> response) {
+                return response.body();
+            }
+        });
+    }
+
+    /**
+     * Gets NetworkRuleSet for a Namespace.
+     *
+     * @param resourceGroupName Name of the resource group within the Azure subscription.
+     * @param namespaceName The Namespace name
+     * @throws IllegalArgumentException thrown if parameters fail the validation
+     * @return the observable to the NetworkRuleSetInner object
+     */
+    public Observable<ServiceResponse<NetworkRuleSetInner>> getNetworkRuleSetWithServiceResponseAsync(String resourceGroupName, String namespaceName) {
+        if (resourceGroupName == null) {
+            throw new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null.");
+        }
+        if (namespaceName == null) {
+            throw new IllegalArgumentException("Parameter namespaceName is required and cannot be null.");
+        }
+        if (this.client.subscriptionId() == null) {
+            throw new IllegalArgumentException("Parameter this.client.subscriptionId() is required and cannot be null.");
+        }
+        if (this.client.apiVersion() == null) {
+            throw new IllegalArgumentException("Parameter this.client.apiVersion() is required and cannot be null.");
+        }
+        return service.getNetworkRuleSet(resourceGroupName, namespaceName, this.client.subscriptionId(), this.client.apiVersion(), this.client.acceptLanguage(), this.client.userAgent())
+            .flatMap(new Func1<Response<ResponseBody>, Observable<ServiceResponse<NetworkRuleSetInner>>>() {
+                @Override
+                public Observable<ServiceResponse<NetworkRuleSetInner>> call(Response<ResponseBody> response) {
+                    try {
+                        ServiceResponse<NetworkRuleSetInner> clientResponse = getNetworkRuleSetDelegate(response);
+                        return Observable.just(clientResponse);
+                    } catch (Throwable t) {
+                        return Observable.error(t);
+                    }
+                }
+            });
+    }
+
+    private ServiceResponse<NetworkRuleSetInner> getNetworkRuleSetDelegate(Response<ResponseBody> response) throws ErrorResponseException, IOException, IllegalArgumentException {
+        return this.client.restClient().responseBuilderFactory().<NetworkRuleSetInner, ErrorResponseException>newInstance(this.client.serializerAdapter())
+                .register(200, new TypeToken<NetworkRuleSetInner>() { }.getType())
+                .registerError(ErrorResponseException.class)
+                .build(response);
+    }
+
     /**
      * Lists all the available Namespaces within a subscription, irrespective of the resource groups.
      *
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetImpl.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetImpl.java
new file mode 100644
index 0000000000000..93b0c1d6bfb93
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetImpl.java
@@ -0,0 +1,60 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation;
+
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NetworkRuleSet;
+import com.microsoft.azure.arm.model.implementation.WrapperImpl;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.DefaultAction;
+import java.util.List;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NWRuleSetIpRules;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NWRuleSetVirtualNetworkRules;
+
+class NetworkRuleSetImpl extends WrapperImpl<NetworkRuleSetInner> implements NetworkRuleSet {
+    private final EventHubManager manager;
+    NetworkRuleSetImpl(NetworkRuleSetInner inner, EventHubManager manager) {
+        super(inner);
+        this.manager = manager;
+    }
+
+    @Override
+    public EventHubManager manager() {
+        return this.manager;
+    }
+
+    @Override
+    public DefaultAction defaultAction() {
+        return this.inner().defaultAction();
+    }
+
+    @Override
+    public String id() {
+        return this.inner().id();
+    }
+
+    @Override
+    public List<NWRuleSetIpRules> ipRules() {
+        return this.inner().ipRules();
+    }
+
+    @Override
+    public String name() {
+        return this.inner().name();
+    }
+
+    @Override
+    public String type() {
+        return this.inner().type();
+    }
+
+    @Override
+    public List<NWRuleSetVirtualNetworkRules> virtualNetworkRules() {
+        return this.inner().virtualNetworkRules();
+    }
+
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetInner.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetInner.java
new file mode 100644
index 0000000000000..ab6d0fa5645f8
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetInner.java
@@ -0,0 +1,103 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation;
+
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.DefaultAction;
+import java.util.List;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NWRuleSetVirtualNetworkRules;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NWRuleSetIpRules;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.microsoft.rest.serializer.JsonFlatten;
+import com.microsoft.azure.ProxyResource;
+
+/**
+ * Description of topic resource.
+ */
+@JsonFlatten
+public class NetworkRuleSetInner extends ProxyResource {
+    /**
+     * Default Action for Network Rule Set. Possible values include: 'Allow',
+     * 'Deny'.
+     */
+    @JsonProperty(value = "properties.defaultAction")
+    private DefaultAction defaultAction;
+
+    /**
+     * List VirtualNetwork Rules.
+     */
+    @JsonProperty(value = "properties.virtualNetworkRules")
+    private List<NWRuleSetVirtualNetworkRules> virtualNetworkRules;
+
+    /**
+     * List of IpRules.
+     */
+    @JsonProperty(value = "properties.ipRules")
+    private List<NWRuleSetIpRules> ipRules;
+
+    /**
+     * Get default Action for Network Rule Set. Possible values include: 'Allow', 'Deny'.
+     *
+     * @return the defaultAction value
+     */
+    public DefaultAction defaultAction() {
+        return this.defaultAction;
+    }
+
+    /**
+     * Set default Action for Network Rule Set. Possible values include: 'Allow', 'Deny'.
+     *
+     * @param defaultAction the defaultAction value to set
+     * @return the NetworkRuleSetInner object itself.
+     */
+    public NetworkRuleSetInner withDefaultAction(DefaultAction defaultAction) {
+        this.defaultAction = defaultAction;
+        return this;
+    }
+
+    /**
+     * Get list VirtualNetwork Rules.
+     *
+     * @return the virtualNetworkRules value
+     */
+    public List<NWRuleSetVirtualNetworkRules> virtualNetworkRules() {
+        return this.virtualNetworkRules;
+    }
+
+    /**
+     * Set list VirtualNetwork Rules.
+     *
+     * @param virtualNetworkRules the virtualNetworkRules value to set
+     * @return the NetworkRuleSetInner object itself.
+     */
+    public NetworkRuleSetInner withVirtualNetworkRules(List<NWRuleSetVirtualNetworkRules> virtualNetworkRules) {
+        this.virtualNetworkRules = virtualNetworkRules;
+        return this;
+    }
+
+    /**
+     * Get list of IpRules.
+     *
+     * @return the ipRules value
+     */
+    public List<NWRuleSetIpRules> ipRules() {
+        return this.ipRules;
+    }
+
+    /**
+     * Set list of IpRules.
+     *
+     * @param ipRules the ipRules value to set
+     * @return the NetworkRuleSetInner object itself.
+     */
+    public NetworkRuleSetInner withIpRules(List<NWRuleSetIpRules> ipRules) {
+        this.ipRules = ipRules;
+        return this;
+    }
+
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetsImpl.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetsImpl.java
new file mode 100644
index 0000000000000..9dd6895ba4463
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetsImpl.java
@@ -0,0 +1,60 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation;
+
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NetworkRuleSets;
+import com.microsoft.azure.arm.model.implementation.WrapperImpl;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.DefaultAction;
+import java.util.List;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NWRuleSetIpRules;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NWRuleSetVirtualNetworkRules;
+
+class NetworkRuleSetsImpl extends WrapperImpl<NetworkRuleSetsInner> implements NetworkRuleSets {
+    private final EventHubManager manager;
+    NetworkRuleSetsImpl(NetworkRuleSetsInner inner, EventHubManager manager) {
+        super(inner);
+        this.manager = manager;
+    }
+
+    @Override
+    public EventHubManager manager() {
+        return this.manager;
+    }
+
+    @Override
+    public DefaultAction defaultAction() {
+        return this.inner().defaultAction();
+    }
+
+    @Override
+    public String id() {
+        return this.inner().id();
+    }
+
+    @Override
+    public List<NWRuleSetIpRules> ipRules() {
+        return this.inner().ipRules();
+    }
+
+    @Override
+    public String name() {
+        return this.inner().name();
+    }
+
+    @Override
+    public String type() {
+        return this.inner().type();
+    }
+
+    @Override
+    public List<NWRuleSetVirtualNetworkRules> virtualNetworkRules() {
+        return this.inner().virtualNetworkRules();
+    }
+
+}
diff --git a/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetsInner.java b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetsInner.java
new file mode 100644
index 0000000000000..e5777f902a843
--- /dev/null
+++ b/eventhub/resource-manager/v2018_01_01_preview/src/main/java/com/microsoft/azure/management/eventhub/v2018_01_01_preview/implementation/NetworkRuleSetsInner.java
@@ -0,0 +1,103 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License. See License.txt in the project root for
+ * license information.
+ *
+ * Code generated by Microsoft (R) AutoRest Code Generator.
+ */
+
+package com.microsoft.azure.management.eventhub.v2018_01_01_preview.implementation;
+
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.DefaultAction;
+import java.util.List;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NWRuleSetVirtualNetworkRules;
+import com.microsoft.azure.management.eventhub.v2018_01_01_preview.NWRuleSetIpRules;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.microsoft.rest.serializer.JsonFlatten;
+import com.microsoft.azure.ProxyResource;
+
+/**
+ * Description of topic resource.
+ */
+@JsonFlatten
+public class NetworkRuleSetsInner extends ProxyResource {
+    /**
+     * Default Action for Network Rule Set. Possible values include: 'Allow',
+     * 'Deny'.
+     */
+    @JsonProperty(value = "properties.defaultAction")
+    private DefaultAction defaultAction;
+
+    /**
+     * List VirtualNetwork Rules.
+     */
+    @JsonProperty(value = "properties.virtualNetworkRules")
+    private List<NWRuleSetVirtualNetworkRules> virtualNetworkRules;
+
+    /**
+     * List of IpRules.
+     */
+    @JsonProperty(value = "properties.ipRules")
+    private List<NWRuleSetIpRules> ipRules;
+
+    /**
+     * Get default Action for Network Rule Set. Possible values include: 'Allow', 'Deny'.
+     *
+     * @return the defaultAction value
+     */
+    public DefaultAction defaultAction() {
+        return this.defaultAction;
+    }
+
+    /**
+     * Set default Action for Network Rule Set. Possible values include: 'Allow', 'Deny'.
+     *
+     * @param defaultAction the defaultAction value to set
+     * @return the NetworkRuleSetsInner object itself.
+     */
+    public NetworkRuleSetsInner withDefaultAction(DefaultAction defaultAction) {
+        this.defaultAction = defaultAction;
+        return this;
+    }
+
+    /**
+     * Get list VirtualNetwork Rules.
+     *
+     * @return the virtualNetworkRules value
+     */
+    public List<NWRuleSetVirtualNetworkRules> virtualNetworkRules() {
+        return this.virtualNetworkRules;
+    }
+
+    /**
+     * Set list VirtualNetwork Rules.
+     *
+     * @param virtualNetworkRules the virtualNetworkRules value to set
+     * @return the NetworkRuleSetsInner object itself.
+     */
+    public NetworkRuleSetsInner withVirtualNetworkRules(List<NWRuleSetVirtualNetworkRules> virtualNetworkRules) {
+        this.virtualNetworkRules = virtualNetworkRules;
+        return this;
+    }
+
+    /**
+     * Get list of IpRules.
+     *
+     * @return the ipRules value
+     */
+    public List<NWRuleSetIpRules> ipRules() {
+        return this.ipRules;
+    }
+
+    /**
+     * Set list of IpRules.
+     *
+     * @param ipRules the ipRules value to set
+     * @return the NetworkRuleSetsInner object itself.
+     */
+    public NetworkRuleSetsInner withIpRules(List<NWRuleSetIpRules> ipRules) {
+        this.ipRules = ipRules;
+        return this;
+    }
+
+}