diff --git a/src/main/java/org/opencord/cordvtn/api/AddressPair.java b/src/main/java/org/opencord/cordvtn/api/AddressPair.java
new file mode 100644
index 0000000..03ad60f
--- /dev/null
+++ b/src/main/java/org/opencord/cordvtn/api/AddressPair.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.opencord.cordvtn.api;
+
+import com.google.common.base.MoreObjects;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Representation of the IP and MAC address pair.
+ */
+public final class AddressPair {
+
+    private final IpAddress ip;
+    private final MacAddress mac;
+
+    private AddressPair(IpAddress ip, MacAddress mac) {
+        this.ip = ip;
+        this.mac = mac;
+    }
+
+    /**
+     * Returns the IP address.
+     *
+     * @return ip address
+     */
+    public IpAddress ip() {
+        return ip;
+    }
+
+    /**
+     * Returns the MAC address.
+     *
+     * @return mac address
+     */
+    public MacAddress mac() {
+        return mac;
+    }
+
+    /**
+     * Returns an address pair instance with the given ip and mac address.
+     *
+     * @param ip ip address
+     * @param mac mac address
+     * @return address pair
+     */
+    public static AddressPair of(IpAddress ip, MacAddress mac) {
+        checkNotNull(ip, "AddressPair IP cannot be null");
+        checkNotNull(mac, "AddressPair MAC cannot be null");
+
+        return new AddressPair(ip, mac);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof AddressPair) {
+            AddressPair that = (AddressPair) obj;
+            if (Objects.equals(ip, that.ip) && Objects.equals(mac, that.mac)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(ip, mac);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("ip", ip)
+                .add("mac", mac)
+                .toString();
+    }
+}
diff --git a/src/main/java/org/opencord/cordvtn/api/NetworkId.java b/src/main/java/org/opencord/cordvtn/api/NetworkId.java
new file mode 100644
index 0000000..843be7e
--- /dev/null
+++ b/src/main/java/org/opencord/cordvtn/api/NetworkId.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.opencord.cordvtn.api;
+
+import org.onlab.util.Identifier;
+
+/**
+ * Representation of the network identifier.
+ */
+public final class NetworkId extends Identifier<String> {
+
+    /**
+     * Default constructor.
+     *
+     * @param id string network identifier
+     */
+    private NetworkId(String id) {
+        super(id);
+    }
+
+    /**
+     * Returns the network identifier with the supplied value.
+     *
+     * @param id string network identifier
+     * @return network identifier
+     */
+    public static NetworkId of(String id) {
+        return new NetworkId(id);
+    }
+}
diff --git a/src/main/java/org/opencord/cordvtn/api/PortId.java b/src/main/java/org/opencord/cordvtn/api/PortId.java
new file mode 100644
index 0000000..6162070
--- /dev/null
+++ b/src/main/java/org/opencord/cordvtn/api/PortId.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.opencord.cordvtn.api;
+
+import org.onlab.util.Identifier;
+
+/**
+ * Representation of the port identifier.
+ */
+public final class PortId extends Identifier<String> {
+
+    /**
+     * Default constructor.
+     *
+     * @param id string port identifier
+     */
+    private PortId(String id) {
+        super(id);
+    }
+
+    /**
+     * Returns the port identifier with the supplied value.
+     *
+     * @param id string port identifier
+     * @return port identifier
+     */
+    public static PortId of(String id) {
+        return new PortId(id);
+    }
+}
diff --git a/src/main/java/org/opencord/cordvtn/api/ServiceNetwork.java b/src/main/java/org/opencord/cordvtn/api/ServiceNetwork.java
new file mode 100644
index 0000000..bc639da
--- /dev/null
+++ b/src/main/java/org/opencord/cordvtn/api/ServiceNetwork.java
@@ -0,0 +1,197 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.opencord.cordvtn.api;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+
+import java.util.Map;
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Representation of a service network.
+ */
+public final class ServiceNetwork {
+
+    public enum ServiceNetworkType {
+        PRIVATE,
+        PUBLIC,
+        MANAGEMENT_HOST,
+        MANAGEMENT_LOCAL,
+        VSG,
+        ACCESS_AGENT
+    }
+
+    public enum DirectAccessType {
+        BIDIRECTIONAL,
+        UNIDIRECTIONAL
+    }
+
+    private final NetworkId id;
+    private final ServiceNetworkType type;
+    private final Map<NetworkId, DirectAccessType> providers;
+
+    private ServiceNetwork(NetworkId id,
+                           ServiceNetworkType type,
+                           Map<NetworkId, DirectAccessType> providers) {
+        this.id = id;
+        this.type = type;
+        this.providers = providers;
+    }
+
+    /**
+     * Returns the network id of the service network.
+     *
+     * @return network id
+     */
+    public NetworkId id() {
+        return id;
+    }
+
+    /**
+     * Returns the type of the service network.
+     *
+     * @return service network type
+     */
+    public ServiceNetworkType type() {
+        return type;
+    }
+
+    /**
+     * Returns the provider networks of this service network if exists.
+     *
+     * @return provider networks
+     */
+    public Map<NetworkId, DirectAccessType> providers() {
+        return providers;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof ServiceNetwork) {
+            ServiceNetwork that = (ServiceNetwork) obj;
+            if (Objects.equals(id, that.id) &&
+                    Objects.equals(type, that.type) &&
+                    Objects.equals(providers, that.providers)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, type, providers);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("networkId", id)
+                .add("type", type)
+                .add("providers", providers)
+                .toString();
+    }
+
+    /**
+     * Returns new service network builder instance.
+     *
+     * @return service network builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Builder of the service network entities.
+     */
+    public static final class Builder {
+        private NetworkId id;
+        private ServiceNetworkType type;
+        private Map<NetworkId, DirectAccessType> providers = Maps.newHashMap();
+
+        private Builder() {
+        }
+
+        /**
+         * Builds an immutable service network.
+         *
+         * @return service network instance
+         */
+        public ServiceNetwork build() {
+            checkNotNull(id, "Service network id cannot be null");
+            checkNotNull(type, "Service network type cannot be null");
+            providers = providers == null ? ImmutableMap.of() : providers;
+
+            return new ServiceNetwork(id, type, providers);
+        }
+
+        /**
+         * Returns service network builder with the supplied network ID.
+         *
+         * @param id network id
+         * @return service network builder
+         */
+        public Builder id(NetworkId id) {
+            this.id = id;
+            return this;
+        }
+
+        /**
+         * Returns service network builder with the supplied service network type.
+         *
+         * @param type service network type
+         * @return service network builder
+         */
+        public Builder type(ServiceNetworkType type) {
+            this.type = type;
+            return this;
+        }
+
+        /**
+         * Returns service network builder with the supplied provider service networks.
+         *
+         * @param providers provider service networks
+         * @return service network builder
+         */
+        public Builder providers(Map<NetworkId, DirectAccessType> providers) {
+            this.providers = providers;
+            return this;
+        }
+
+        /**
+         * Returns service network builder with the given additional provider network.
+         *
+         * @param id provider network id
+         * @param type direct access type to the provider network
+         * @return service network builder
+         */
+        public Builder addProvider(NetworkId id, DirectAccessType type) {
+            checkNotNull(id, "Provider network ID cannot be null");
+            checkNotNull(type, "Provider network type cannot be null");
+
+            this.providers.put(id, type);
+            return this;
+        }
+    }
+}
diff --git a/src/main/java/org/opencord/cordvtn/api/ServicePort.java b/src/main/java/org/opencord/cordvtn/api/ServicePort.java
new file mode 100644
index 0000000..61b0e52
--- /dev/null
+++ b/src/main/java/org/opencord/cordvtn/api/ServicePort.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.opencord.cordvtn.api;
+
+import com.google.common.base.MoreObjects;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Sets;
+import org.onlab.packet.VlanId;
+
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Representation of a service port.
+ */
+public final class ServicePort {
+
+    private final PortId id;
+    private final VlanId vlanId;
+    private final Set<AddressPair> addressPairs;
+
+    private ServicePort(PortId id,
+                        VlanId vlanId,
+                        Set<AddressPair> addressPairs) {
+        this.id = id;
+        this.vlanId = vlanId;
+        this.addressPairs = addressPairs;
+    }
+
+    /**
+     * Returns the port id of the service port.
+     *
+     * @return port id
+     */
+    public PortId id() {
+        return id;
+    }
+
+    /**
+     * Returns the vlan id of the the service port if exists.
+     *
+     * @return vlan id
+     */
+    public Optional<VlanId> vlanId() {
+        return Optional.ofNullable(vlanId);
+    }
+
+    /**
+     * Returns the additional address pairs used in this port.
+     *
+     * @return set of ip and mac address pairs
+     */
+    public Set<AddressPair> addressPairs() {
+        return addressPairs;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof ServicePort) {
+            ServicePort that = (ServicePort) obj;
+            if (Objects.equals(id, that.id) &&
+                    Objects.equals(vlanId, that.vlanId) &&
+                    Objects.equals(addressPairs, that.addressPairs)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, vlanId, addressPairs);
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(getClass())
+                .add("portId", id)
+                .add("vlanId", vlanId)
+                .add("addressPairs", addressPairs)
+                .toString();
+    }
+
+    /**
+     * Returns new service port builder instance.
+     *
+     * @return service port builder
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * Builder of the service port entities.
+     */
+    public static final class Builder {
+        private PortId id;
+        private VlanId vlanId;
+        private Set<AddressPair> addressPairs = Sets.newHashSet();
+
+        private Builder() {
+        }
+
+        /**
+         * Builds an immutable service port.
+         *
+         * @return service port instance
+         */
+        public ServicePort build() {
+            checkNotNull(id, "ServicePort port id cannot be null");
+            addressPairs = addressPairs == null ? ImmutableSet.of() : addressPairs;
+
+            return new ServicePort(id, vlanId, addressPairs);
+        }
+
+        /**
+         * Returns service port builder with the supplied port port id.
+         *
+         * @param id port id
+         * @return service port builder
+         */
+        public Builder id(PortId id) {
+            this.id = id;
+            return this;
+        }
+
+        /**
+         * Returns service port builder with the supplied VLAN ID.
+         *
+         * @param vlanId vlan id
+         * @return service port builder
+         */
+        public Builder vlanId(VlanId vlanId) {
+            this.vlanId = vlanId;
+            return this;
+        }
+
+        /**
+         * Returns service port builder with the supplied address pairs.
+         *
+         * @param addressPairs set of address pairs
+         * @return service port builder
+         */
+        public Builder addressPairs(Set<AddressPair> addressPairs) {
+            this.addressPairs = addressPairs;
+            return this;
+        }
+
+        /**
+         * Returns service port builder with the given additional address pair.
+         *
+         * @param addressPair address pair to add
+         * @return service port builder
+         */
+        public Builder addAddressPair(AddressPair addressPair) {
+            checkNotNull(addressPair, "ServicePort address pair cannot be null");
+
+            this.addressPairs.add(addressPair);
+            return this;
+        }
+    }
+}