HONEYCOMB-9: Migrate Interface listener

Change-Id: Iffde1ee21b749a8c8efa96c243f7f8bb0811b4c7
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

18 files changed, 1292 insertions, 141 deletions

diff --git a/v3po/v3po2vpp/src/main/config/default-config.xml b/v3po/v3po2vpp/src/main/config/default-config.xml
index 1a1e6a8f5..89c3c47a2 100644
--- a/v3po/v3po2vpp/src/main/config/default-config.xml
+++ b/v3po/v3po2vpp/src/main/config/default-config.xml
@@ -53,6 +53,15 @@
                 </module>
 
                 <module>
+                    <type xmlns:prefix="urn:honeycomb:params:xml:ns:yang:v3po2vpp">prefix:interfaces-honeycomb-writer</type>
+                    <name>interfaces-honeycomb-writer</name>
+                    <vpp-japi-ifc>
+                        <type xmlns:prefix="urn:honeycomb:params:xml:ns:yang:vpp:japi:cfg">prefix:vpp-japi</type>
+                        <name>vpp-japi</name>
+                    </vpp-japi-ifc>
+                </module>
+
+                <module>
                     <type xmlns:prefix="urn:honeycomb:params:xml:ns:yang:translate:utils">prefix:delegating-reader-registry</type>
                     <name>read-registry</name>
                     <root-readers>
@@ -64,6 +73,7 @@
                         <name>interfaces-state-honeycomb-reader</name>
                     </root-readers>
                 </module>
+
                 <module>
                     <type xmlns:prefix="urn:honeycomb:params:xml:ns:yang:translate:utils">prefix:delegating-writer-registry</type>
                     <name>write-registry</name>
@@ -71,8 +81,13 @@
                         <type xmlns:prefix="urn:honeycomb:params:xml:ns:yang:translate:api">prefix:honeycomb-writer</type>
                         <name>vpp-honeycomb-writer</name>
                     </root-writers>
+                    <root-writers>
+                        <type xmlns:prefix="urn:honeycomb:params:xml:ns:yang:translate:api">prefix:honeycomb-writer</type>
+                        <name>interfaces-honeycomb-writer</name>
+                    </root-writers>
                 </module>
             </modules>
+
             <services xmlns="urn:opendaylight:params:xml:ns:yang:controller:config">
                 <service>
                     <type xmlns:prefix="urn:honeycomb:params:xml:ns:yang:translate:api">prefix:honeycomb-reader</type>
@@ -93,6 +108,11 @@
                         <provider>/modules/module[type='vpp-honeycomb-writer'][name='vpp-honeycomb-writer']
                         </provider>
                     </instance>
+                    <instance>
+                        <name>interfaces-honeycomb-writer</name>
+                        <provider>/modules/module[type='interfaces-honeycomb-writer'][name='interfaces-honeycomb-writer']
+                        </provider>
+                    </instance>
                 </service>
             </services>
         </data>
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/EthernetCustomizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/EthernetCustomizer.java
new file mode 100644
index 000000000..69ff63137
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/EthernetCustomizer.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.spi.write.ChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Ethernet;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class EthernetCustomizer extends VppApiCustomizer implements ChildWriterCustomizer<Ethernet> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(EthernetCustomizer.class);
+
+    public EthernetCustomizer(final org.openvpp.vppjapi.vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Nonnull
+    @Override
+    public Optional<Ethernet> extract(@Nonnull final InstanceIdentifier<Ethernet> currentId,
+                                      @Nonnull final DataObject parentData) {
+        return Optional.fromNullable(((VppInterfaceAugmentation) parentData).getEthernet());
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Ethernet> id,
+                                       @Nonnull final Ethernet dataAfter, @Nonnull final Context writeContext) {
+        // TODO
+        LOG.warn("Unsupported, ignoring configuration {}", dataAfter);
+
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Ethernet> id,
+                                        @Nonnull final Ethernet dataBefore, @Nonnull final Ethernet dataAfter,
+                                        @Nonnull final Context writeContext) {
+        // TODO
+        LOG.warn("Unsupported, ignoring configuration {}", dataAfter);
+
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Ethernet> id,
+                                        @Nonnull final Ethernet dataBefore, @Nonnull final Context writeContext) {
+        // TODO
+        LOG.warn("Unsupported, ignoring configuration delete {}", id);
+
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/InterfaceCustomizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/InterfaceCustomizer.java
new file mode 100644
index 000000000..6b91e2e0a
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/InterfaceCustomizer.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces;
+
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.spi.write.ListWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import java.util.List;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.InterfaceKey;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.openvpp.vppjapi.vppApi;
+
+/**
+ * Ietf interface write customizer that only caches interface objects for child writers
+ */
+public class InterfaceCustomizer extends VppApiCustomizer implements ListWriterCustomizer<Interface, InterfaceKey> {
+
+    public static final String IFC_AFTER_CTX = InterfaceCustomizer.class.toString() + "ifcAfter";
+    public static final String IFC_BEFORE_CTX = InterfaceCustomizer.class.toString() + "ifcBefore";
+
+    public InterfaceCustomizer(final vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+                                       @Nonnull final Interface dataAfter,
+                                       @Nonnull final Context writeContext) {
+        writeContext.put(IFC_AFTER_CTX, dataAfter);
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+                                        @Nonnull final Interface dataBefore,
+                                        @Nonnull final Interface dataAfter,
+                                        @Nonnull final Context writeContext) {
+        writeContext.put(IFC_BEFORE_CTX, dataBefore);
+        writeContext.put(IFC_AFTER_CTX, dataAfter);
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Interface> id,
+                                        @Nonnull final Interface dataBefore,
+                                        @Nonnull final Context writeContext) {
+        writeContext.put(IFC_BEFORE_CTX, dataBefore);
+    }
+
+    @Nonnull
+    @Override
+    public List<Interface> extract(@Nonnull final InstanceIdentifier<Interface> currentId,
+                                   @Nonnull final DataObject parentData) {
+        return ((Interfaces) parentData).getInterface();
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/L2Customizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/L2Customizer.java
new file mode 100644
index 000000000..e596f8fbf
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/L2Customizer.java
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.spi.write.ChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiInvocationException;
+import io.fd.honeycomb.v3po.translate.v3po.utils.V3poUtils;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.L2;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.l2.Interconnection;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.l2.interconnection.BridgeBased;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.l2.interconnection.XconnectBased;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class L2Customizer extends VppApiCustomizer implements ChildWriterCustomizer<L2> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(L2Customizer.class);
+
+    public L2Customizer(final org.openvpp.vppjapi.vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Nonnull
+    @Override
+    public Optional<L2> extract(@Nonnull final InstanceIdentifier<L2> currentId, @Nonnull final DataObject parentData) {
+        return Optional.fromNullable(((VppInterfaceAugmentation) parentData).getL2());
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<L2> id, @Nonnull final L2 dataAfter,
+                                       @Nonnull final Context writeContext)
+        throws WriteFailedException {
+        final Interface ifc = (Interface) writeContext.get(InterfaceCustomizer.IFC_AFTER_CTX);
+
+        final int swIfc = getSwIfc(ifc);
+        try {
+            setL2(id, swIfc, ifc, dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Write of L2 failed", e);
+            throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<L2> id, @Nonnull final L2 dataBefore,
+                                        @Nonnull final L2 dataAfter, @Nonnull final Context writeContext)
+        throws WriteFailedException {
+        final Interface ifcBefore = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+        final Interface ifcAfter = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+
+        final int swIfc = getSwIfc(ifcBefore);
+        // TODO handle update properly (if possible)
+        try {
+            setL2(id, swIfc, ifcAfter, dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Update of L2 failed", e);
+            throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter, e);
+        }
+    }
+
+    private int getSwIfc(final Interface ifcBefore) {
+        int swIfcIndex = getVppApi().swIfIndexFromName(ifcBefore.getName());
+        checkArgument(swIfcIndex != -1, "Interface %s does not exist", ifcBefore.getName());
+        return swIfcIndex;
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<L2> id, @Nonnull final L2 dataBefore,
+                                        @Nonnull final Context writeContext) {
+        final Interface ifcBefore = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+
+        final int swIfc = getSwIfc(ifcBefore);
+        // TODO implement delete (if possible)
+    }
+
+    private void setL2(final InstanceIdentifier<L2> id, final int swIfIndex, final Interface ifc, final L2 vppL2)
+        throws VppApiInvocationException, WriteFailedException {
+        LOG.debug("Setting L2 for interface: %s", ifc.getName());
+        // Nothing besides interconnection here
+        setInterconnection(id, swIfIndex, ifc, vppL2);
+    }
+
+    private void setInterconnection(final InstanceIdentifier<L2> id, final int swIfIndex, final Interface ifc,
+                                    final L2 vppL2)
+        throws VppApiInvocationException, WriteFailedException {
+        Interconnection ic = vppL2.getInterconnection();
+        if (ic instanceof XconnectBased) {
+            setXconnectBasedL2(swIfIndex, ifc, (XconnectBased) ic);
+        } else if (ic instanceof BridgeBased) {
+            setBridgeBasedL2(swIfIndex, ifc, (BridgeBased) ic);
+        } else {
+            // FIXME how does choice extensibility work
+            // FIXME it is not even possible to create a dedicated customizer for Interconnection, since it's not a DataObject
+            // FIXME we might need a choice customizer
+            // THis choice is already from augment, so its probably not possible to augment augmented choice
+            LOG.error("Unable to handle Interconnection of type {}", ic.getClass());
+            throw new WriteFailedException(id, "Unable to handle Interconnection of type " + ic.getClass());
+        }
+    }
+
+    private void setBridgeBasedL2(final int swIfIndex, final Interface ifc, final BridgeBased bb)
+        throws VppApiInvocationException {
+
+        LOG.debug("Setting bridge based interconnection(bridge-domain=%s) for interface: %s",
+            bb.getBridgeDomain(), ifc.getName());
+
+        String bdName = bb.getBridgeDomain();
+        int bdId = getVppApi().bridgeDomainIdFromName(bdName);
+        checkArgument(bdId > 0, "Unable to set Interconnection for Interface: %s, bridge domain: %s does not exist",
+            ifc.getName(), bdName);
+
+        byte bvi = bb.isBridgedVirtualInterface()
+            ? (byte) 1
+            : (byte) 0;
+        byte shg = bb.getSplitHorizonGroup().byteValue();
+
+        final int ctxId = getVppApi().swInterfaceSetL2Bridge(swIfIndex, bdId, shg, bvi, (byte) 1 /* enable */);
+        final int rv = V3poUtils.waitForResponse(ctxId, getVppApi());
+
+        if (rv < 0) {
+            LOG.warn("Failed to update bridge based interconnection flags for: {}, interconnection: {}", ifc.getName(),
+                bb);
+            throw new VppApiInvocationException("swInterfaceSetL2Bridge", ctxId, rv);
+        } else {
+            LOG.debug("Bridge based interconnection updated successfully for: {}, interconnection: {}", ifc.getName(),
+                bb);
+        }
+    }
+
+    private void setXconnectBasedL2(final int swIfIndex, final Interface ifc, final XconnectBased ic)
+        throws VppApiInvocationException {
+
+        String outSwIfName = ic.getXconnectOutgoingInterface();
+        LOG.debug("Setting xconnect based interconnection(outgoing ifc=%s) for interface: %s", outSwIfName,
+            ifc.getName());
+
+        int outSwIfIndex = getVppApi().swIfIndexFromName(outSwIfName);
+        checkArgument(outSwIfIndex > 0,
+            "Unable to set Interconnection for Interface: %s, outgoing interface: %s does not exist",
+            ifc.getName(), outSwIfIndex);
+
+        int ctxId = getVppApi().swInterfaceSetL2Xconnect(swIfIndex, outSwIfIndex, (byte) 1 /* enable */);
+        final int rv = V3poUtils.waitForResponse(ctxId, getVppApi());
+
+        if (rv < 0) {
+            LOG.warn("Failed to update xconnect based interconnection flags for: {}, interconnection: {}",
+                ifc.getName(), ic);
+            throw new VppApiInvocationException("swInterfaceSetL2Xconnect", ctxId, rv);
+        } else {
+            LOG.debug("Xconnect based interconnection updated successfully for: {}, interconnection: {}", ifc.getName(),
+                ic);
+        }
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/RoutingCustomizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/RoutingCustomizer.java
new file mode 100644
index 000000000..8d930d80c
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/RoutingCustomizer.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces;
+
+import static com.google.common.base.Preconditions.checkArgument;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.spi.write.ChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiInvocationException;
+import io.fd.honeycomb.v3po.translate.v3po.utils.V3poUtils;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Routing;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class RoutingCustomizer extends VppApiCustomizer implements ChildWriterCustomizer<Routing> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(RoutingCustomizer.class);
+
+    public RoutingCustomizer(final org.openvpp.vppjapi.vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Nonnull
+    @Override
+    public Optional<Routing> extract(@Nonnull final InstanceIdentifier<Routing> currentId,
+                                     @Nonnull final DataObject parentData) {
+        return Optional.fromNullable(((VppInterfaceAugmentation) parentData).getRouting());
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Routing> id,
+                                       @Nonnull final Routing dataAfter, @Nonnull final Context writeContext)
+        throws WriteFailedException.CreateFailedException {
+        final Interface ifc = (Interface) writeContext.get(InterfaceCustomizer.IFC_AFTER_CTX);
+
+        try {
+            setRouting(ifc.getName(), dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Update of Routing failed", e);
+            throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Routing> id,
+                                        @Nonnull final Routing dataBefore, @Nonnull final Routing dataAfter,
+                                        @Nonnull final Context writeContext)
+        throws WriteFailedException.UpdateFailedException {
+        final Interface ifcBefore = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+        final Interface ifcAfter = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+
+        try {
+            // TODO handle updates properly
+            setRouting(ifcAfter.getName(), dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Update of Routing failed", e);
+            throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Routing> id,
+                                        @Nonnull final Routing dataBefore, @Nonnull final Context writeContext) {
+        // TODO implement delete
+    }
+
+    private void setRouting(final String name, final Routing rt) throws VppApiInvocationException {
+        final int swIfc = getSwIfc(name);
+        LOG.debug("Setting routing for interface: {}, {}. Routing: {}", name, swIfc, rt);
+
+        int vrfId = (rt != null)
+            ? rt.getVrfId().intValue()
+            : 0;
+
+        if (vrfId != 0) {
+            final int ctxId = getVppApi().swInterfaceSetTable(swIfc, (byte) 0, /* isIpv6 */ vrfId);
+            final int rv = V3poUtils.waitForResponse(ctxId, getVppApi());
+            if (rv < 0) {
+                LOG.debug("Failed to set routing for interface: {}, {}, vxlan: {}", name, swIfc, rt);
+                throw new VppApiInvocationException("swInterfaceSetTable", ctxId, rv);
+            } else {
+                LOG.debug("Routing set successfully for interface: {}, {}, routing: {}", name, swIfc, rt);
+            }
+        }
+    }
+
+    private int getSwIfc(final String name) {
+        int swIfcIndex = getVppApi().swIfIndexFromName(name);
+        checkArgument(swIfcIndex != -1, "Interface %s does not exist", name);
+        return swIfcIndex;
+    }
+
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/VppInterfaceCustomizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/VppInterfaceCustomizer.java
new file mode 100644
index 000000000..3ea3f9743
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/VppInterfaceCustomizer.java
@@ -0,0 +1,210 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.spi.write.ChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiInvocationException;
+import io.fd.honeycomb.v3po.translate.v3po.utils.V3poUtils;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.iana._if.type.rev140508.EthernetCsmacd;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfaceType;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VxlanTunnel;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class VppInterfaceCustomizer extends VppApiCustomizer
+    implements ChildWriterCustomizer<VppInterfaceAugmentation> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(VppInterfaceCustomizer.class);
+
+    public VppInterfaceCustomizer(final org.openvpp.vppjapi.vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Nonnull
+    @Override
+    public Optional<VppInterfaceAugmentation> extract(
+        @Nonnull final InstanceIdentifier<VppInterfaceAugmentation> currentId,
+        @Nonnull final DataObject parentData) {
+        return Optional.fromNullable(((Interface) parentData).getAugmentation(VppInterfaceAugmentation.class));
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<VppInterfaceAugmentation> id,
+                                       @Nonnull final VppInterfaceAugmentation dataAfter,
+                                       @Nonnull final Context writeContext)
+        throws WriteFailedException {
+        final Interface ifc = (Interface) writeContext.get(InterfaceCustomizer.IFC_AFTER_CTX);
+        try {
+            setInterface(id, ifc, dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Update of VppInterfaceAugment failed", e);
+            throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<VppInterfaceAugmentation> id,
+                                        @Nonnull final VppInterfaceAugmentation dataBefore,
+                                        @Nonnull final VppInterfaceAugmentation dataAfter,
+                                        @Nonnull final Context writeContext)
+        throws WriteFailedException.UpdateFailedException {
+        final Interface ifcBefore = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+        final Interface ifc = (Interface) writeContext.get(InterfaceCustomizer.IFC_AFTER_CTX);
+        try {
+            updateInterface(id, ifc, dataBefore, dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Update of VppInterfaceAugment failed", e);
+            throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<VppInterfaceAugmentation> id,
+                                        @Nonnull final VppInterfaceAugmentation dataBefore,
+                                        @Nonnull final Context writeContext) {
+        final Interface ifcBefore = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+
+        LOG.info("Deleting interface: {}, type: {}", ifcBefore.getName(), ifcBefore.getType().getSimpleName());
+
+        if (ifcBefore.getType().isAssignableFrom(EthernetCsmacd.class)) {
+            LOG.error("Interface {}, type: {} cannot be deleted",
+                ifcBefore.getName(), ifcBefore.getType().getSimpleName());
+
+        /* FIXME: Add additional interface types here.
+         *
+         * } else if (swIf.getType().isAssignableFrom(*.class)) {
+         */
+
+        }
+    }
+
+
+    private void updateInterface(final InstanceIdentifier<VppInterfaceAugmentation> id, final Interface swIf,
+                                 final VppInterfaceAugmentation dataBefore,
+                                 final VppInterfaceAugmentation dataAfter) throws VppApiInvocationException {
+        LOG.info("Updating interface {}, type: {}", swIf.getName(), swIf.getType().getSimpleName());
+        LOG.debug("Updating interface {}", swIf);
+
+        Class<? extends InterfaceType> ifType = checkNotNull(swIf.getType(), "Interface type missing for %s", swIf);
+        String swIfName = swIf.getName();
+        int swIfIndex = getVppApi().swIfIndexFromName(swIfName);
+        checkArgument(swIfIndex != -1, "Updating non-existing vpp interface: %s", swIfName);
+
+        // TODO handle updates properly
+
+        if (VxlanTunnel.class.isAssignableFrom(ifType)) {
+            updateVxlanTunnelInterface(swIf);
+        } else if (EthernetCsmacd.class.isAssignableFrom(ifType)) {
+            updateEthernetCsmacdInterface(swIf, swIfName, swIfIndex);
+        }
+    }
+
+
+    private void setInterface(final InstanceIdentifier<VppInterfaceAugmentation> id, final Interface swIf,
+                              final VppInterfaceAugmentation dataAfter)
+        throws VppApiInvocationException, WriteFailedException {
+        LOG.info("Setting interface {}, type: {}", swIf.getName(), swIf.getType().getSimpleName());
+        LOG.debug("Setting interface {}", swIf);
+
+        Class<? extends InterfaceType> ifType = checkNotNull(swIf.getType(), "Interface type missing for %s", swIf);
+        String swIfName = swIf.getName();
+        int swIfIndex = getVppApi().swIfIndexFromName(swIfName);
+        checkArgument(swIfIndex == -1, "Creating already-existing vpp interface: %s", swIfName);
+
+        if (VxlanTunnel.class.isAssignableFrom(ifType)) {
+            createVxlanTunnelInterface(swIf, swIfName);
+        } else if (EthernetCsmacd.class.isAssignableFrom(ifType)) {
+            createEthernetCsmacdInterface(id, swIfName, dataAfter);
+        }
+    }
+
+    private void createVxlanTunnelInterface(final Interface swIf, final String swIfName)
+        throws VppApiInvocationException {
+        LOG.debug("Creating {} interface {}", swIf.getType().getSimpleName(), swIf.getName());
+
+        // FIXME, Vxlan child writer needs to be handled before this is
+        int newSwIfIndex = getVppApi().swIfIndexFromName(swIfName);
+
+        setInterfaceFlags(swIfName, newSwIfIndex, swIf.isEnabled()
+            ? (byte) 1
+            : (byte) 0);
+        setDescription(swIf);
+    }
+
+    private void updateVxlanTunnelInterface(final Interface swIf) {
+        LOG.debug("Updating {} interface {}", swIf.getType().getSimpleName(), swIf.getName());
+
+        // TODO handle
+    }
+
+    private void createEthernetCsmacdInterface(final InstanceIdentifier<VppInterfaceAugmentation> id,
+                                               final String swIfName, final VppInterfaceAugmentation dataAfter) throws WriteFailedException {
+        LOG.warn("Unable to create interface: {}, type: {}", swIfName, EthernetCsmacd.class);
+        throw new WriteFailedException.CreateFailedException(id, dataAfter);
+    }
+
+    private void updateEthernetCsmacdInterface(final Interface swIf,
+                                               final String swIfName, final int swIfIndex)
+        throws VppApiInvocationException {
+        LOG.debug("Updating {} interface {}", swIf.getType().getSimpleName(), swIf.getName());
+        byte enabled = swIf.isEnabled()
+            ? (byte) 1
+            : (byte) 0;
+        setInterfaceFlags(swIfName, swIfIndex, enabled);
+        setDescription(swIf);
+    }
+
+    private void setInterfaceFlags(final String swIfName, final int swIfIndex, final byte enabled)
+        throws VppApiInvocationException {
+        int ctxId = getVppApi().swInterfaceSetFlags(swIfIndex, enabled, enabled, (byte) 0 /* deleted */);
+
+        LOG.debug("Updating interface flags for: {}, index: {}, enabled: {}, ctxId: {}", swIfName, swIfIndex,
+            enabled, ctxId);
+
+        final int rv = V3poUtils.waitForResponse(ctxId, getVppApi());
+        if (rv < 0) {
+            LOG.warn("Failed to update interface flags for: {}, index: {}, enabled: {}, ctxId: {}", swIfName, swIfIndex,
+                enabled, ctxId);
+            throw new VppApiInvocationException("swInterfaceSetFlags", ctxId, rv);
+        } else {
+            LOG.debug("Interface flags updated successfully for: {}, index: {}, enabled: {}, ctxId: {}",
+                swIfName, swIfIndex, enabled, ctxId);
+        }
+    }
+
+    private void setDescription(final Interface swIf) {
+        if (swIf.getDescription() != null) {
+            getVppApi().setInterfaceDescription(swIf.getName(), swIf.getDescription());
+        } else {
+            getVppApi().setInterfaceDescription(swIf.getName(), "");
+        }
+    }
+
+}
+
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/VxlanCustomizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/VxlanCustomizer.java
new file mode 100644
index 000000000..2b2774ece
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/VxlanCustomizer.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiInvocationException;
+import io.fd.honeycomb.v3po.translate.spi.write.ChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.utils.V3poUtils;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VxlanTunnel;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Vxlan;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class VxlanCustomizer extends VppApiCustomizer implements ChildWriterCustomizer<Vxlan> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(VxlanCustomizer.class);
+
+
+    public VxlanCustomizer(final org.openvpp.vppjapi.vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Nonnull
+    @Override
+    public Optional<Vxlan> extract(@Nonnull final InstanceIdentifier<Vxlan> currentId,
+                                   @Nonnull final DataObject parentData) {
+        return Optional.fromNullable(((VppInterfaceAugmentation) parentData).getVxlan());
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Vxlan> id, @Nonnull final Vxlan dataAfter,
+                                       @Nonnull final Context writeContext)
+        throws WriteFailedException.CreateFailedException {
+        final Interface ifc = (Interface) writeContext.get(InterfaceCustomizer.IFC_AFTER_CTX);
+        try {
+            createVxlanTunnel(ifc.getName(), dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Write of Vxlan failed", e);
+            throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Vxlan> id, @Nonnull final Vxlan dataBefore,
+                                        @Nonnull final Vxlan dataAfter, @Nonnull final Context writeContext)
+        throws WriteFailedException.UpdateFailedException {
+        final Interface ifcBefore = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+        final Interface ifcAfter = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+
+        // TODO handle update in a better way
+        try {
+            createVxlanTunnel(ifcAfter.getName(), dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Update of L2 failed", e);
+            throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Vxlan> id, @Nonnull final Vxlan dataBefore,
+                                        @Nonnull final Context writeContext) {
+        final Interface ifcBefore = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+
+        // TODO handle delete
+    }
+
+    private void createVxlanTunnel(final String swIfName, final Vxlan vxlan) throws VppApiInvocationException {
+        Ipv4Address srcAddress = vxlan.getSrc();
+        Ipv4Address dstAddress = vxlan.getDst();
+
+        int srcAddr = V3poUtils.parseIp(srcAddress.getValue());
+        int dstAddr = V3poUtils.parseIp(dstAddress.getValue());
+        int encapVrfId = vxlan.getEncapVrfId().intValue();
+        int vni = vxlan.getVni().getValue().intValue();
+
+        LOG.debug("Setting vxlan tunnel for interface: {}. Vxlan: {}", swIfName, vxlan);
+        int ctxId = getVppApi().vxlanAddDelTunnel((byte) 1 /* is add */, srcAddr, dstAddr, encapVrfId, -1, vni);
+        final int rv = V3poUtils.waitForResponse(ctxId, getVppApi());
+        if (rv < 0) {
+            LOG.debug("Failed to set vxlan tunnel for interface: {}, vxlan: {}", swIfName, vxlan);
+            throw new VppApiInvocationException("vxlanAddDelTunnel", ctxId, rv);
+        } else {
+            LOG.debug("Vxlan tunnel set successfully for: {}, vxlan: {}", swIfName, vxlan);
+            // FIXME avoid this dump just to fill cache in vpp-japi
+            // refresh interfaces to be able to get ifIndex
+            getVppApi().swInterfaceDump((byte) 1, V3poUtils.IFC_TYPES.inverse().get(VxlanTunnel.class).getBytes());
+        }
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Interface1Customizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Interface1Customizer.java
new file mode 100644
index 000000000..9f3584908
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Interface1Customizer.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces.ip;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.spi.write.ChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.Interface1;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+public class Interface1Customizer extends VppApiCustomizer implements ChildWriterCustomizer<Interface1> {
+
+    public Interface1Customizer(final org.openvpp.vppjapi.vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Nonnull
+    @Override
+    public Optional<Interface1> extract(@Nonnull final InstanceIdentifier<Interface1> currentId,
+                                        @Nonnull final DataObject parentData) {
+        return Optional.fromNullable(((Interface) parentData).getAugmentation(Interface1.class));
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Interface1> id,
+                                       @Nonnull final Interface1 dataAfter, @Nonnull final Context writeContext) {
+
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Interface1> id,
+                                        @Nonnull final Interface1 dataBefore, @Nonnull final Interface1 dataAfter,
+                                        @Nonnull final Context writeContext) {
+
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Interface1> id,
+                                        @Nonnull final Interface1 dataBefore, @Nonnull final Context writeContext) {
+
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Ipv4Customizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Ipv4Customizer.java
new file mode 100644
index 000000000..08974fe68
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Ipv4Customizer.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces.ip;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.spi.write.ChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.InterfaceCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiInvocationException;
+import io.fd.honeycomb.v3po.translate.v3po.utils.V3poUtils;
+import io.fd.honeycomb.v3po.translate.write.WriteFailedException;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.Interface1;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.Ipv4;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.Address;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.Subnet;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.subnet.Netmask;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.ipv4.address.subnet.PrefixLength;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class Ipv4Customizer extends VppApiCustomizer implements ChildWriterCustomizer<Ipv4> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(Ipv4Customizer.class);
+
+    public Ipv4Customizer(final org.openvpp.vppjapi.vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Nonnull
+    @Override
+    public Optional<Ipv4> extract(@Nonnull final InstanceIdentifier<Ipv4> currentId,
+                                  @Nonnull final DataObject parentData) {
+        return Optional.fromNullable(((Interface1) parentData).getIpv4());
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Ipv4> id,
+                                       @Nonnull final Ipv4 dataAfter, @Nonnull final Context writeContext)
+        throws WriteFailedException {
+        final Interface ifc = (Interface) writeContext.get(InterfaceCustomizer.IFC_AFTER_CTX);
+
+        try {
+            setIpv4(id, ifc.getName(), dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Create of Ipv4 failed", e);
+            throw new WriteFailedException.CreateFailedException(id, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Ipv4> id,
+                                        @Nonnull final Ipv4 dataBefore, @Nonnull final Ipv4 dataAfter,
+                                        @Nonnull final Context writeContext)
+        throws WriteFailedException {
+        final Interface ifcBefore = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+        final Interface ifcAfter = (Interface) writeContext.get(InterfaceCustomizer.IFC_BEFORE_CTX);
+
+        // TODO handle update in a better way
+        try {
+            setIpv4(id, ifcAfter.getName(), dataAfter);
+        } catch (VppApiInvocationException e) {
+            LOG.warn("Update of Ipv4 failed", e);
+            throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter, e);
+        }
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Ipv4> id,
+                                        @Nonnull final Ipv4 dataBefore, @Nonnull final Context writeContext) {
+        // TODO implement delete
+    }
+
+    private void setIpv4(final InstanceIdentifier<Ipv4> id, final String name, final Ipv4 ipv4)
+        throws WriteFailedException, VppApiInvocationException {
+        final int swIfc = getSwIfc(name);
+
+        for (Address ipv4Addr : ipv4.getAddress()) {
+            Subnet subnet = ipv4Addr.getSubnet();
+
+            if (subnet instanceof PrefixLength) {
+                setPrefixLengthSubnet(name, swIfc, ipv4Addr, (PrefixLength) subnet);
+            } else if (subnet instanceof Netmask) {
+                setNetmaskSubnet();
+            } else {
+                // FIXME how does choice extensibility work
+                // FIXME it is not even possible to create a dedicated customizer for Interconnection, since it's not a DataObject
+                // FIXME we might need a choice customizer
+                // THis choice is already from augment, so its probably not possible to augment augmented choice
+                LOG.error("Unable to handle subnet of type {}", subnet.getClass());
+                throw new WriteFailedException(id, "Unable to handle subnet of type " + subnet.getClass());
+            }
+        }
+    }
+
+    private void setNetmaskSubnet() {
+        // FIXME
+        throw new UnsupportedOperationException("Unimplemented");
+    }
+
+    private void setPrefixLengthSubnet(final String name, final int swIfc, final Address ipv4Addr,
+                                       final PrefixLength subnet) throws VppApiInvocationException {
+        Short plen = subnet.getPrefixLength();
+        LOG.debug("Setting Subnet(prefix-length) for interface: {}, {}. Subnet: {}, Ipv4: {}", name, swIfc, subnet,
+            ipv4Addr);
+
+        byte[] addr = V3poUtils.ipv4AddressNoZoneToArray(ipv4Addr.getIp());
+
+        checkArgument(plen > 0, "Invalid length");
+        checkNotNull(addr, "Null address");
+
+        final int ctxId = getVppApi().swInterfaceAddDelAddress(swIfc, (byte) 1 /* isAdd */, (byte) 0 /* isIpv6 */,
+            (byte) 0 /* delAll */, plen.byteValue(), addr);
+
+        final int rv = V3poUtils.waitForResponse(ctxId, getVppApi());
+        if (rv < 0) {
+            LOG.warn("Failed to set Subnet(prefix-length) for interface: {}, {},  Subnet: {}, Ipv4: {}", name, swIfc,
+                subnet, ipv4Addr);
+            throw new VppApiInvocationException("swInterfaceAddDelAddress", ctxId, rv);
+        } else {
+            LOG.debug("Subnet(prefix-length) set successfully for interface: {}, {},  Subnet: {}, Ipv4: {}", name,
+                swIfc, subnet, ipv4Addr);
+        }
+    }
+
+
+    private int getSwIfc(final String name) {
+        int swIfcIndex = getVppApi().swIfIndexFromName(name);
+        checkArgument(swIfcIndex != -1, "Interface %s does not exist", name);
+        return swIfcIndex;
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Ipv6Customizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Ipv6Customizer.java
new file mode 100644
index 000000000..3798f891a
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/interfaces/ip/Ipv6Customizer.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.interfaces.ip;
+
+import com.google.common.base.Optional;
+import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.spi.write.ChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
+import javax.annotation.Nonnull;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.Interface1;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.Ipv6;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class Ipv6Customizer extends VppApiCustomizer implements ChildWriterCustomizer<Ipv6> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(Ipv6Customizer.class);
+
+    public Ipv6Customizer(final org.openvpp.vppjapi.vppApi vppApi) {
+        super(vppApi);
+    }
+
+    @Nonnull
+    @Override
+    public Optional<Ipv6> extract(@Nonnull final InstanceIdentifier<Ipv6> currentId,
+                                      @Nonnull final DataObject parentData) {
+        return Optional.fromNullable(((Interface1) parentData).getIpv6());
+    }
+
+    @Override
+    public void writeCurrentAttributes(@Nonnull final InstanceIdentifier<Ipv6> id,
+                                       @Nonnull final Ipv6 dataAfter, @Nonnull final Context writeContext) {
+        // TODO
+        LOG.warn("Unsupported, ignoring configuration {}", dataAfter);
+    }
+
+    @Override
+    public void updateCurrentAttributes(@Nonnull final InstanceIdentifier<Ipv6> id,
+                                        @Nonnull final Ipv6 dataBefore, @Nonnull final Ipv6 dataAfter,
+                                        @Nonnull final Context writeContext) {
+        LOG.warn("Unsupported, ignoring configuration {}", dataAfter);
+    }
+
+    @Override
+    public void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<Ipv6> id,
+                                        @Nonnull final Ipv6 dataBefore, @Nonnull final Context writeContext) {
+        LOG.warn("Unsupported, ignoring configuration delete {}", id);
+        // TODO
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/utils/V3poUtils.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/utils/V3poUtils.java
new file mode 100644
index 000000000..18a8103cc
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/utils/V3poUtils.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * 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 io.fd.honeycomb.v3po.translate.v3po.utils;
+
+import com.google.common.base.Splitter;
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.iana._if.type.rev140508.EthernetCsmacd;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.iana._if.type.rev140508.SoftwareLoopback;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.InterfaceType;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VxlanTunnel;
+import org.openvpp.vppjapi.vppApi;
+
+public final class V3poUtils {
+
+    // TODO move to vpp-translate-utils
+
+    public static final int RESPONSE_NOT_READY = -77;
+    public static final int RELEASE = 1;
+    public static final Splitter DOT_SPLITTER = Splitter.on('.');
+    public static final BiMap<String, Class<? extends InterfaceType>> IFC_TYPES = HashBiMap.create();
+    static {
+        V3poUtils.IFC_TYPES.put("vxlan", VxlanTunnel.class);
+        V3poUtils.IFC_TYPES.put("lo", SoftwareLoopback.class);
+        V3poUtils.IFC_TYPES.put("Ether", EthernetCsmacd.class);
+        // TODO missing types below
+//        V3poUtils.IFC_TYPES.put("l2tpv3_tunnel", EthernetCsmacd.class);
+//        V3poUtils.IFC_TYPES.put("tap", EthernetCsmacd.class);
+    }
+
+    private V3poUtils() {}
+
+    public static int waitForResponse(final int ctxId, final vppApi vppApi) {
+        int rv;
+        while ((rv = vppApi.getRetval(ctxId, RELEASE)) == RESPONSE_NOT_READY) {
+            // TODO limit attempts
+        }
+        return rv;
+    }
+
+    public static int parseIp(final String address) {
+        int result = 0;
+
+        // iterate over each octet
+        for (String part : DOT_SPLITTER.split(address)) {
+            // shift the previously parsed bits over by 1 byte
+            result = result << 8;
+            // set the low order bits to the current octet
+            result |= Integer.parseInt(part);
+        }
+        return result;
+    }
+
+    public static byte[] ipv4AddressNoZoneToArray(final Ipv4AddressNoZone ipv4Addr) {
+        byte[] retval = new byte[4];
+        String[] dots = ipv4Addr.getValue().split("\\.");
+
+        for (int d = 3; d >= 0; d--) {
+            retval[d] = (byte) (Short.parseShort(dots[3 - d]) & 0xff);
+        }
+        return retval;
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/vpp/BridgeDomainCustomizer.java b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/vpp/BridgeDomainCustomizer.java
index ffbc95beb..c69f2ef0a 100644
--- a/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/vpp/BridgeDomainCustomizer.java
+++ b/v3po/v3po2vpp/src/main/java/io/fd/honeycomb/v3po/translate/v3po/vpp/BridgeDomainCustomizer.java
@@ -23,6 +23,7 @@ import static com.google.common.base.Preconditions.checkState;
 import io.fd.honeycomb.v3po.translate.spi.write.ListWriterCustomizer;
 import io.fd.honeycomb.v3po.translate.v3po.util.VppApiCustomizer;
 import io.fd.honeycomb.v3po.translate.Context;
+import io.fd.honeycomb.v3po.translate.v3po.utils.V3poUtils;
 import java.util.List;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -41,8 +42,6 @@ public class BridgeDomainCustomizer
     private static final Logger LOG = LoggerFactory.getLogger(BridgeDomainCustomizer.class);
 
     private static final byte ADD_OR_UPDATE_BD = (byte) 1;
-    private static final int RESPONSE_NOT_READY = -77;
-    private static final int RELEASE = 1;
 
     public BridgeDomainCustomizer(final org.openvpp.vppjapi.vppApi api) {
         super(api);
@@ -55,14 +54,6 @@ public class BridgeDomainCustomizer
         return ((BridgeDomains) parentData).getBridgeDomain();
     }
 
-    private int waitForResponse(final int ctxId) {
-        int rv;
-        while ((rv = getVppApi().getRetval(ctxId, RELEASE)) == RESPONSE_NOT_READY) {
-            // TODO limit attempts
-        }
-        return rv;
-    }
-
     private int addOrUpdateBridgeDomain(final int bdId, @Nonnull final BridgeDomain bd) {
         byte flood = booleanToByte(bd.isFlood());
         byte forward = booleanToByte(bd.isForward());
@@ -71,7 +62,7 @@ public class BridgeDomainCustomizer
         byte arpTerm = booleanToByte(bd.isArpTermination());
 
         int ctxId = getVppApi().bridgeDomainAddDel(bdId, flood, forward, learn, uuf, arpTerm, ADD_OR_UPDATE_BD);
-        return waitForResponse(ctxId);
+        return V3poUtils.waitForResponse(ctxId, getVppApi());
     }
 
     @Override
@@ -111,7 +102,7 @@ public class BridgeDomainCustomizer
             (byte) 0 /* arpTerm */,
             (byte) 0 /* isAdd */);
 
-        int rv = waitForResponse(ctxId);
+        int rv = V3poUtils.waitForResponse(ctxId, getVppApi());
 
         checkState(rv >= 0, "Bridge domain delete failed. Return code: %s", rv);
         LOG.debug("Bridge domain {} deleted as {} successfully", bdName, bdId);
diff --git a/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesHoneycombWriterModule.java b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesHoneycombWriterModule.java
new file mode 100644
index 000000000..4710d9e1a
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesHoneycombWriterModule.java
@@ -0,0 +1,114 @@
+package org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406;
+
+import com.google.common.collect.Lists;
+import io.fd.honeycomb.v3po.translate.impl.TraversalType;
+import io.fd.honeycomb.v3po.translate.impl.write.CompositeChildWriter;
+import io.fd.honeycomb.v3po.translate.impl.write.CompositeListWriter;
+import io.fd.honeycomb.v3po.translate.impl.write.CompositeRootWriter;
+import io.fd.honeycomb.v3po.translate.util.RWUtils;
+import io.fd.honeycomb.v3po.translate.util.write.CloseableWriter;
+import io.fd.honeycomb.v3po.translate.util.write.NoopWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.util.write.ReflexiveChildWriterCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.EthernetCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.InterfaceCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.L2Customizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.RoutingCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.VppInterfaceCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.VxlanCustomizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.ip.Ipv4Customizer;
+import io.fd.honeycomb.v3po.translate.v3po.interfaces.ip.Ipv6Customizer;
+import io.fd.honeycomb.v3po.translate.write.ChildWriter;
+import java.util.ArrayList;
+import java.util.List;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.Interface1;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.Ipv4;
+import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces._interface.Ipv6;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Ethernet;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.L2;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Routing;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.interfaces._interface.Vxlan;
+import org.opendaylight.yangtools.yang.binding.Augmentation;
+import org.opendaylight.yangtools.yang.binding.ChildOf;
+
+public class InterfacesHoneycombWriterModule extends org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406.AbstractInterfacesHoneycombWriterModule {
+    public InterfacesHoneycombWriterModule(org.opendaylight.controller.config.api.ModuleIdentifier identifier, org.opendaylight.controller.config.api.DependencyResolver dependencyResolver) {
+        super(identifier, dependencyResolver);
+    }
+
+    public InterfacesHoneycombWriterModule(org.opendaylight.controller.config.api.ModuleIdentifier identifier, org.opendaylight.controller.config.api.DependencyResolver dependencyResolver, org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406.InterfacesHoneycombWriterModule oldModule, java.lang.AutoCloseable oldInstance) {
+        super(identifier, dependencyResolver, oldModule, oldInstance);
+    }
+
+    @Override
+    public void customValidation() {
+        // add custom validation form module attributes here.
+    }
+
+    @Override
+    public java.lang.AutoCloseable createInstance() {
+
+        final List<ChildWriter<? extends Augmentation<Interface>>> ifcAugmentations = Lists.newArrayList();
+        ifcAugmentations.add(getVppIfcAugmentationWriter());
+
+        final ChildWriter<Interface> interfaceWriter = new CompositeListWriter<>(Interface.class,
+            RWUtils.<Interface>emptyChildWriterList(),
+            ifcAugmentations,
+            new InterfaceCustomizer(getVppJapiIfcDependency()));
+
+        final List<ChildWriter<? extends ChildOf<Interfaces>>> childWriters = new ArrayList<>();
+        childWriters.add(interfaceWriter);
+
+        // FIXME if we just return the root writer and cfg subsystem takes care to set it into reader registry,
+        // we loose the ordering information for root writers
+        // Or can we rely to the order in which readers are configured ?
+        return new CloseableWriter<>(new CompositeRootWriter<>(Interfaces.class,
+            childWriters, new NoopWriterCustomizer<Interfaces>()));
+    }
+
+    private ChildWriter<? extends Augmentation<Interface>> getInterface1AugmentationWriter() {
+        final ChildWriter<Ipv4> ipv4Writer = new CompositeChildWriter<>(Ipv4.class,
+            new Ipv4Customizer(getVppJapiIfcDependency()));
+        final ChildWriter<Ipv6> ipv6Writer = new CompositeChildWriter<>(Ipv6.class,
+            new Ipv6Customizer(getVppJapiIfcDependency()));
+
+        final List<ChildWriter<? extends ChildOf<Interface1>>> interface1ChildWriters = Lists.newArrayList();
+        interface1ChildWriters.add(ipv4Writer);
+        interface1ChildWriters.add(ipv6Writer);
+
+        return new CompositeChildWriter<>(Interface1.class,
+            interface1ChildWriters, new ReflexiveChildWriterCustomizer<Interface1>());
+    }
+
+    private ChildWriter<VppInterfaceAugmentation> getVppIfcAugmentationWriter() {
+
+        final ChildWriter<Ethernet> ethernetWriter = new CompositeChildWriter<>(Ethernet.class,
+            new EthernetCustomizer(getVppJapiIfcDependency()));
+
+        final ChildWriter<Routing> routingWriter = new CompositeChildWriter<>(Routing.class,
+            new RoutingCustomizer(getVppJapiIfcDependency()));
+
+        final ChildWriter<Vxlan> vxlanWriter = new CompositeChildWriter<>(Vxlan.class,
+            new VxlanCustomizer(getVppJapiIfcDependency()));
+
+        final ChildWriter<L2> l2Writer = new CompositeChildWriter<>(L2.class,
+            new L2Customizer(getVppJapiIfcDependency()));
+
+        final List<ChildWriter<? extends ChildOf<VppInterfaceAugmentation>>> vppIfcChildWriters = Lists.newArrayList();
+        // TODO what's the order here ?
+        vppIfcChildWriters.add(ethernetWriter);
+        vppIfcChildWriters.add(vxlanWriter);
+        vppIfcChildWriters.add(l2Writer);
+        vppIfcChildWriters.add(routingWriter);
+
+        return new CompositeChildWriter<>(VppInterfaceAugmentation.class,
+            vppIfcChildWriters,
+            RWUtils.<VppInterfaceAugmentation>emptyAugWriterList(),
+            new VppInterfaceCustomizer(getVppJapiIfcDependency()),
+            // It's important that this customizer is handled in a postorder way, because you first have to handle child nodes
+            // e.g. Vxlan before setting other interface or vppInterfaceAugmentation leaves
+            TraversalType.POSTORDER);
+    }
+}
diff --git a/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesHoneycombWriterModuleFactory.java b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesHoneycombWriterModuleFactory.java
new file mode 100644
index 000000000..9332d3017
--- /dev/null
+++ b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesHoneycombWriterModuleFactory.java
@@ -0,0 +1,13 @@
+/*
+* Generated file
+*
+* Generated from: yang module name: v3po2vpp yang module local name: interfaces-honeycomb-writer
+* Generated by: org.opendaylight.controller.config.yangjmxgenerator.plugin.JMXGenerator
+* Generated at: Fri Apr 08 13:28:05 CEST 2016
+*
+* Do not modify this file unless it is present under src/main directory
+*/
+package org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406;
+public class InterfacesHoneycombWriterModuleFactory extends org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406.AbstractInterfacesHoneycombWriterModuleFactory {
+
+}
diff --git a/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesStateHoneycombReaderModule.java b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesStateHoneycombReaderModule.java
index 5b79ff0d3..aa72a29af 100644
--- a/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesStateHoneycombReaderModule.java
+++ b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/InterfacesStateHoneycombReaderModule.java
@@ -1,14 +1,11 @@
 package org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406;
 
-import com.google.common.base.Optional;
 import io.fd.honeycomb.v3po.translate.impl.read.CompositeChildReader;
 import io.fd.honeycomb.v3po.translate.impl.read.CompositeListReader;
 import io.fd.honeycomb.v3po.translate.impl.read.CompositeRootReader;
 import io.fd.honeycomb.v3po.translate.read.ChildReader;
-import io.fd.honeycomb.v3po.translate.read.ReadContext;
-import io.fd.honeycomb.v3po.translate.read.ReadFailedException;
-import io.fd.honeycomb.v3po.translate.read.Reader;
 import io.fd.honeycomb.v3po.translate.util.RWUtils;
+import io.fd.honeycomb.v3po.translate.util.read.CloseableReader;
 import io.fd.honeycomb.v3po.translate.util.read.ReflexiveRootReaderCustomizer;
 import io.fd.honeycomb.v3po.translate.v3po.interfacesstate.InterfaceCustomizer;
 import io.fd.honeycomb.v3po.translate.v3po.interfacesstate.VppInterfaceStateCustomizer;
@@ -17,14 +14,9 @@ import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.InterfaceBuilder;
 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.InterfaceKey;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceAugmentation;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppInterfaceStateAugmentation;
-import org.opendaylight.yangtools.yang.binding.DataObject;
-import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 import org.openvpp.vppjapi.vppApi;
 
-import javax.annotation.Nonnull;
-
 public class InterfacesStateHoneycombReaderModule extends org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406.AbstractInterfacesStateHoneycombReaderModule {
     public InterfacesStateHoneycombReaderModule(org.opendaylight.controller.config.api.ModuleIdentifier identifier, org.opendaylight.controller.config.api.DependencyResolver dependencyResolver) {
         super(identifier, dependencyResolver);
@@ -53,44 +45,10 @@ public class InterfacesStateHoneycombReaderModule extends org.opendaylight.yang.
                         RWUtils.<Interface>singletonAugReaderList(vppInterfaceStateAugmentationChildReader),
                         new InterfaceCustomizer(vppApi));
 
-        return new CloseableReader(new CompositeRootReader<>(
+        return new CloseableReader<>(new CompositeRootReader<>(
                 InterfacesState.class,
                 RWUtils.singletonChildReaderList(interfaceReader),
                 RWUtils.<InterfacesState>emptyAugReaderList(),
                 new ReflexiveRootReaderCustomizer<>(InterfacesStateBuilder.class)));
     }
-
-
-    private static final class CloseableReader implements Reader<InterfacesState>, AutoCloseable {
-
-        private CompositeRootReader<InterfacesState, InterfacesStateBuilder> compositeRootReader;
-
-        public CloseableReader(
-                final CompositeRootReader<InterfacesState, InterfacesStateBuilder> compositeRootReader) {
-            this.compositeRootReader = compositeRootReader;
-        }
-
-        @Nonnull
-        @Override
-        public Optional<? extends DataObject> read(@Nonnull InstanceIdentifier<? extends DataObject> id,
-                                                   @Nonnull ReadContext ctx) throws ReadFailedException {
-            return compositeRootReader.read(id, ctx);
-        }
-
-        @Nonnull
-        @Override
-        public InstanceIdentifier<InterfacesState> getManagedDataObjectType() {
-            return compositeRootReader.getManagedDataObjectType();
-        }
-
-        @Override
-        public String toString() {
-            return compositeRootReader.toString();
-        }
-
-        @Override
-        public void close() throws Exception {
-            //NOOP
-        }
-    }
 }
diff --git a/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/VppHoneycombWriterModule.java b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/VppHoneycombWriterModule.java
index 5694bc139..a9eff593d 100644
--- a/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/VppHoneycombWriterModule.java
+++ b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/VppHoneycombWriterModule.java
@@ -1,27 +1,21 @@
 package org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406;
 
-import io.fd.honeycomb.v3po.translate.TranslationException;
 import io.fd.honeycomb.v3po.translate.impl.write.CompositeChildWriter;
 import io.fd.honeycomb.v3po.translate.impl.write.CompositeListWriter;
 import io.fd.honeycomb.v3po.translate.impl.write.CompositeRootWriter;
 import io.fd.honeycomb.v3po.translate.util.RWUtils;
+import io.fd.honeycomb.v3po.translate.util.write.CloseableWriter;
 import io.fd.honeycomb.v3po.translate.util.write.NoopWriterCustomizer;
 import io.fd.honeycomb.v3po.translate.util.write.ReflexiveChildWriterCustomizer;
 import io.fd.honeycomb.v3po.translate.v3po.vpp.BridgeDomainCustomizer;
 import io.fd.honeycomb.v3po.translate.write.ChildWriter;
-import io.fd.honeycomb.v3po.translate.write.WriteContext;
-import io.fd.honeycomb.v3po.translate.write.Writer;
 import java.util.ArrayList;
 import java.util.List;
-import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.Vpp;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.vpp.BridgeDomains;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.vpp.bridge.domains.BridgeDomain;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.vpp.bridge.domains.BridgeDomainKey;
 import org.opendaylight.yangtools.yang.binding.ChildOf;
-import org.opendaylight.yangtools.yang.binding.DataObject;
-import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 
 public class VppHoneycombWriterModule extends org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406.AbstractVppHoneycombWriterModule {
     public VppHoneycombWriterModule(org.opendaylight.controller.config.api.ModuleIdentifier identifier, org.opendaylight.controller.config.api.DependencyResolver dependencyResolver) {
@@ -51,46 +45,10 @@ public class VppHoneycombWriterModule extends org.opendaylight.yang.gen.v1.urn.h
         final List<ChildWriter<? extends ChildOf<Vpp>>> childWriters = new ArrayList<>();
         childWriters.add(bridgeDomainsReader);
 
-        return new CloseableWriter(new CompositeRootWriter<>(
+        return new CloseableWriter<>(new CompositeRootWriter<>(
             Vpp.class,
             childWriters,
             new NoopWriterCustomizer<Vpp>()));
     }
 
-    // TODO move to translate-utils
-    private static final class CloseableWriter implements Writer<Vpp>, AutoCloseable {
-
-        private CompositeRootWriter<Vpp> vppCompositeRootWriter;
-
-        public CloseableWriter(
-            final CompositeRootWriter<Vpp> vppCompositeRootWriter) {
-            this.vppCompositeRootWriter = vppCompositeRootWriter;
-        }
-
-        @Override
-        public void update(
-            @Nonnull final InstanceIdentifier<? extends DataObject> id,
-            @Nullable final DataObject dataBefore,
-            @Nullable final DataObject dataAfter,
-            @Nonnull final WriteContext ctx) throws TranslationException {
-            vppCompositeRootWriter.update(id, dataBefore, dataAfter, ctx);
-        }
-
-        @Nonnull
-        @Override
-        public InstanceIdentifier<Vpp> getManagedDataObjectType() {
-            return vppCompositeRootWriter.getManagedDataObjectType();
-        }
-
-        @Override
-        public String toString() {
-            return vppCompositeRootWriter.toString();
-        }
-
-        @Override
-        public void close() throws Exception {
-
-        }
-    }
-
 }
diff --git a/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/VppStateHoneycombReaderModule.java b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/VppStateHoneycombReaderModule.java
index 8da7dad1c..0e1d48035 100644
--- a/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/VppStateHoneycombReaderModule.java
+++ b/v3po/v3po2vpp/src/main/java/org/opendaylight/yang/gen/v1/urn/honeycomb/params/xml/ns/yang/v3po2vpp/rev160406/VppStateHoneycombReaderModule.java
@@ -1,21 +1,17 @@
 package org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406;
 
-import com.google.common.base.Optional;
 import io.fd.honeycomb.v3po.translate.impl.read.CompositeChildReader;
 import io.fd.honeycomb.v3po.translate.impl.read.CompositeListReader;
 import io.fd.honeycomb.v3po.translate.impl.read.CompositeRootReader;
 import io.fd.honeycomb.v3po.translate.read.ChildReader;
-import io.fd.honeycomb.v3po.translate.read.ReadContext;
-import io.fd.honeycomb.v3po.translate.read.ReadFailedException;
-import io.fd.honeycomb.v3po.translate.read.Reader;
 import io.fd.honeycomb.v3po.translate.util.RWUtils;
+import io.fd.honeycomb.v3po.translate.util.read.CloseableReader;
 import io.fd.honeycomb.v3po.translate.util.read.ReflexiveChildReaderCustomizer;
 import io.fd.honeycomb.v3po.translate.util.read.ReflexiveRootReaderCustomizer;
 import io.fd.honeycomb.v3po.translate.v3po.vppstate.BridgeDomainCustomizer;
 import io.fd.honeycomb.v3po.translate.v3po.vppstate.VersionCustomizer;
 import java.util.ArrayList;
 import java.util.List;
-import javax.annotation.Nonnull;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppState;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.VppStateBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.vpp.state.BridgeDomains;
@@ -25,8 +21,6 @@ import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.vpp.state.bridge.domains.BridgeDomainBuilder;
 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.v3po.rev150105.vpp.state.bridge.domains.BridgeDomainKey;
 import org.opendaylight.yangtools.yang.binding.ChildOf;
-import org.opendaylight.yangtools.yang.binding.DataObject;
-import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 import org.openvpp.vppjapi.vppApi;
 
 public class VppStateHoneycombReaderModule extends org.opendaylight.yang.gen.v1.urn.honeycomb.params.xml.ns.yang.v3po2vpp.rev160406.AbstractVppStateHoneycombReaderModule {
@@ -61,44 +55,11 @@ public class VppStateHoneycombReaderModule extends org.opendaylight.yang.gen.v1.
         childVppReaders.add(versionReader);
         childVppReaders.add(bridgeDomainsReader);
 
-        return new CloseableReader(new CompositeRootReader<>(
+        return new CloseableReader<>(new CompositeRootReader<>(
             VppState.class,
             childVppReaders,
             RWUtils.<VppState>emptyAugReaderList(),
             new ReflexiveRootReaderCustomizer<>(VppStateBuilder.class)));
     }
 
-    // TODO move to utils
-    private static final class CloseableReader implements Reader<VppState>, AutoCloseable {
-
-        private CompositeRootReader<VppState, VppStateBuilder> vppStateVppStateBuilderCompositeRootReader;
-
-        public CloseableReader(
-            final CompositeRootReader<VppState, VppStateBuilder> vppStateVppStateBuilderCompositeRootReader) {
-            this.vppStateVppStateBuilderCompositeRootReader = vppStateVppStateBuilderCompositeRootReader;
-        }
-
-        @Nonnull
-        @Override
-        public Optional<? extends DataObject> read(@Nonnull final InstanceIdentifier<? extends DataObject> id,
-                                                   @Nonnull final ReadContext ctx) throws ReadFailedException {
-            return vppStateVppStateBuilderCompositeRootReader.read(id, ctx);
-        }
-
-        @Nonnull
-        @Override
-        public InstanceIdentifier<VppState> getManagedDataObjectType() {
-            return vppStateVppStateBuilderCompositeRootReader.getManagedDataObjectType();
-        }
-
-        @Override
-        public String toString() {
-            return vppStateVppStateBuilderCompositeRootReader.toString();
-        }
-
-        @Override
-        public void close() throws Exception {
-            //NOOP
-        }
-    }
 }
diff --git a/v3po/v3po2vpp/src/main/yang/v3po2vpp.yang b/v3po/v3po2vpp/src/main/yang/v3po2vpp.yang
index 9d3199970..286feb987 100644
--- a/v3po/v3po2vpp/src/main/yang/v3po2vpp.yang
+++ b/v3po/v3po2vpp/src/main/yang/v3po2vpp.yang
@@ -79,4 +79,25 @@ module v3po2vpp {
         }
     }
 
+    identity interfaces-honeycomb-writer {
+        base config:module-type;
+        config:provided-service tapi:honeycomb-writer;
+    }
+
+    augment "/config:modules/config:module/config:configuration" {
+        case interfaces-honeycomb-writer {
+            when "/config:modules/config:module/config:type = 'interfaces-honeycomb-writer'";
+
+            container vpp-japi-ifc {
+                uses config:service-ref {
+                    refine type {
+                        mandatory true;
+                        config:required-identity vjc:vpp-japi;
+                    }
+                }
+            }
+
+        }
+    }
+
 }
\ No newline at end of file