elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/internal/ElanServiceProvider.java

   1 /*
   2  * Copyright (c) 2016, 2017 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.netvirt.elan.internal;
  10
  11 import static java.util.Collections.emptyList;
  12
  13 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  14 import java.util.ArrayList;
  15 import java.util.Collection;
  16 import java.util.Collections;
  17 import java.util.HashSet;
  18 import java.util.List;
  19 import java.util.Map;
  20 import java.util.Objects;
  21 import java.util.Optional;
  22 import java.util.Set;
  23 import java.util.concurrent.Future;
  24 import java.util.function.BiFunction;
  25 import javax.inject.Inject;
  26 import javax.inject.Singleton;
  27 import org.eclipse.jdt.annotation.NonNull;
  28 import org.eclipse.jdt.annotation.Nullable;
  29 import org.opendaylight.genius.infra.Datastore;
  30 import org.opendaylight.genius.infra.ManagedNewTransactionRunner;
  31 import org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl;
  32 import org.opendaylight.genius.interfacemanager.exceptions.InterfaceAlreadyExistsException;
  33 import org.opendaylight.genius.interfacemanager.globals.IfmConstants;
  34 import org.opendaylight.genius.interfacemanager.interfaces.IInterfaceManager;
  35 import org.opendaylight.genius.mdsalutil.MDSALUtil;
  36 import org.opendaylight.genius.mdsalutil.NwConstants;
  37 import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager;
  38 import org.opendaylight.genius.utils.ServiceIndex;
  39 import org.opendaylight.genius.utils.hwvtep.HwvtepSouthboundConstants;
  40 import org.opendaylight.infrautils.inject.AbstractLifecycle;
  41 import org.opendaylight.infrautils.utils.concurrent.LoggingFutures;
  42 import org.opendaylight.mdsal.binding.api.DataBroker;
  43 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  44 import org.opendaylight.mdsal.eos.binding.api.Entity;
  45 import org.opendaylight.mdsal.eos.binding.api.EntityOwnershipCandidateRegistration;
  46 import org.opendaylight.mdsal.eos.binding.api.EntityOwnershipService;
  47 import org.opendaylight.mdsal.eos.common.api.CandidateAlreadyRegisteredException;
  48 import org.opendaylight.netvirt.elan.arp.responder.ArpResponderInput;
  49 import org.opendaylight.netvirt.elan.arp.responder.ArpResponderUtil;
  50 import org.opendaylight.netvirt.elan.cache.ElanInstanceCache;
  51 import org.opendaylight.netvirt.elan.cache.ElanInterfaceCache;
  52 import org.opendaylight.netvirt.elan.utils.ElanConstants;
  53 import org.opendaylight.netvirt.elan.utils.ElanUtils;
  54 import org.opendaylight.netvirt.elanmanager.api.ElanHelper;
  55 import org.opendaylight.netvirt.elanmanager.api.IElanService;
  56 import org.opendaylight.ovsdb.utils.southbound.utils.SouthboundUtils;
  57 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces;
  58 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.Interface;
  59 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.InterfaceKey;
  60 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.PhysAddress;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolInput;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolInputBuilder;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolOutput;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.rev160406.IfL2vlan;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.etree.rev160614.EtreeInstance;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.etree.rev160614.EtreeInstanceBuilder;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.etree.rev160614.EtreeInterface;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.etree.rev160614.EtreeInterface.EtreeInterfaceType;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.etree.rev160614.EtreeInterfaceBuilder;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.ElanInstances;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.ElanInterfaces;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan._interface.forwarding.entries.ElanInterfaceMac;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.dpn.interfaces.elan.dpn.interfaces.list.DpnInterfaces;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstance;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstanceBuilder;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstanceKey;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.interfaces.ElanInterface;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.interfaces.ElanInterfaceBuilder;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.interfaces.ElanInterfaceKey;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.interfaces.elan._interface.StaticMacEntries;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.interfaces.elan._interface.StaticMacEntriesBuilder;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.state.Elan;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.forwarding.entries.MacEntry;
  86 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  87 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  88 import org.opendaylight.yangtools.yang.common.RpcResult;
  89 import org.opendaylight.yangtools.yang.common.Uint32;
  90 import org.opendaylight.yangtools.yang.common.Uint64;
  91 import org.slf4j.Logger;
  92 import org.slf4j.LoggerFactory;
  93
  94 @Singleton
  95 public class ElanServiceProvider extends AbstractLifecycle implements IElanService {
  96
  97     private static final Logger LOG = LoggerFactory.getLogger(ElanServiceProvider.class);
  98
  99     private final IdManagerService idManager;
 100     private final IInterfaceManager interfaceManager;
 101     private final ElanBridgeManager bridgeMgr;
 102     private final DataBroker broker;
 103     private final ManagedNewTransactionRunner txRunner;
 104     private final ElanUtils elanUtils;
 105     private final SouthboundUtils southboundUtils;
 106     private final IMdsalApiManager mdsalManager;
 107     private final ElanInstanceCache elanInstanceCache;
 108     private final ElanInterfaceCache elanInterfaceCache;
 109     private boolean isL2BeforeL3;
 110
 111     private final EntityOwnershipCandidateRegistration candidateRegistration;
 112
 113     @Inject
 114     public ElanServiceProvider(IdManagerService idManager, IInterfaceManager interfaceManager,
 115                                ElanBridgeManager bridgeMgr,
 116                                DataBroker dataBroker,
 117                                ElanUtils elanUtils,
 118                                EntityOwnershipService entityOwnershipService,
 119                                SouthboundUtils southboundUtils, ElanInstanceCache elanInstanceCache,
 120                                ElanInterfaceCache elanInterfaceCache, IMdsalApiManager mdsalManager) {
 121         this.idManager = idManager;
 122         this.interfaceManager = interfaceManager;
 123         this.bridgeMgr = bridgeMgr;
 124         this.broker = dataBroker;
 125         this.txRunner = new ManagedNewTransactionRunnerImpl(dataBroker);
 126         this.elanUtils = elanUtils;
 127         this.southboundUtils = southboundUtils;
 128         this.elanInstanceCache = elanInstanceCache;
 129         this.elanInterfaceCache = elanInterfaceCache;
 130         this.mdsalManager = mdsalManager;
 131
 132         candidateRegistration = registerCandidate(entityOwnershipService);
 133     }
 134
 135     @Nullable
 136     private static EntityOwnershipCandidateRegistration registerCandidate(
 137             EntityOwnershipService entityOwnershipService) {
 138         try {
 139             return entityOwnershipService.registerCandidate(
 140                     new Entity(HwvtepSouthboundConstants.ELAN_ENTITY_TYPE, HwvtepSouthboundConstants.ELAN_ENTITY_TYPE));
 141         } catch (CandidateAlreadyRegisteredException e) {
 142             LOG.error("failed to register the entity");
 143             return null;
 144         }
 145     }
 146
 147     @Override
 148     @SuppressWarnings("checkstyle:IllegalCatch")
 149     protected void start() throws Exception {
 150         LOG.info("Starting ElanServiceProvider");
 151         setIsL2BeforeL3();
 152         createIdPool();
 153     }
 154
 155     @Override
 156     protected void stop() {
 157         if (candidateRegistration != null) {
 158             candidateRegistration.close();
 159         }
 160
 161         LOG.info("ElanServiceProvider stopped");
 162     }
 163
 164     @Override
 165     // Confusing with isOpenstackVniSemanticsEnforced but this is an interface method so can't change it.
 166     @SuppressFBWarnings("NM_CONFUSING")
 167     public Boolean isOpenStackVniSemanticsEnforced() {
 168         return elanUtils.isOpenstackVniSemanticsEnforced();
 169     }
 170
 171     private void createIdPool() throws Exception {
 172         CreateIdPoolInput createPool = new CreateIdPoolInputBuilder().setPoolName(ElanConstants.ELAN_ID_POOL_NAME)
 173                 .setLow(ElanConstants.ELAN_ID_LOW_VALUE).setHigh(ElanConstants.ELAN_ID_HIGH_VALUE).build();
 174         Future<RpcResult<CreateIdPoolOutput>> result = idManager.createIdPool(createPool);
 175         if (result != null && result.get().isSuccessful()) {
 176             LOG.debug("ELAN Id Pool is created successfully");
 177         }
 178     }
 179
 180     @Override
 181     public boolean createElanInstance(String elanInstanceName, long macTimeout, String description) {
 182         Optional<ElanInstance> existingElanInstance = elanInstanceCache.get(elanInstanceName);
 183         boolean isSuccess = true;
 184         if (existingElanInstance.isPresent()) {
 185             if (compareWithExistingElanInstance(existingElanInstance.get(), macTimeout, description)) {
 186                 LOG.debug("Elan Instance is already present in the Operational DS {}", existingElanInstance);
 187                 return true;
 188             } else {
 189                 ElanInstance updateElanInstance = new ElanInstanceBuilder().setElanInstanceName(elanInstanceName)
 190                         .setDescription(description).setMacTimeout(macTimeout)
 191                         .withKey(new ElanInstanceKey(elanInstanceName)).build();
 192                 MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 193                         ElanHelper.getElanInstanceConfigurationDataPath(elanInstanceName), updateElanInstance);
 194                 LOG.debug("Updating the Elan Instance {} with MAC TIME-OUT {} and Description {}",
 195                         updateElanInstance, macTimeout, description);
 196             }
 197         } else {
 198             ElanInstance elanInstance = new ElanInstanceBuilder().setElanInstanceName(elanInstanceName)
 199                     .setMacTimeout(macTimeout).setDescription(description)
 200                     .withKey(new ElanInstanceKey(elanInstanceName)).build();
 201             MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 202                     ElanHelper.getElanInstanceConfigurationDataPath(elanInstanceName), elanInstance);
 203             LOG.debug("Creating the new Elan Instance {}", elanInstance);
 204         }
 205         return isSuccess;
 206     }
 207
 208     @Override
 209     public boolean createEtreeInstance(String elanInstanceName, long macTimeout, String description) {
 210         Optional<ElanInstance> existingElanInstance = elanInstanceCache.get(elanInstanceName);
 211         boolean isSuccess = true;
 212         if (existingElanInstance.isPresent()) {
 213             if (compareWithExistingElanInstance(existingElanInstance.get(), macTimeout, description)) {
 214                 LOG.warn("Etree Instance is already present in the Operational DS {}", existingElanInstance);
 215                 return true;
 216             } else {
 217                 EtreeInstance etreeInstance = new EtreeInstanceBuilder().build();
 218                 ElanInstance updateElanInstance = new ElanInstanceBuilder().setElanInstanceName(elanInstanceName)
 219                         .setDescription(description).setMacTimeout(macTimeout)
 220                         .withKey(new ElanInstanceKey(elanInstanceName))
 221                         .addAugmentation(EtreeInstance.class, etreeInstance).build();
 222                 MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 223                         ElanHelper.getElanInstanceConfigurationDataPath(elanInstanceName), updateElanInstance);
 224                 LOG.debug("Updating the Etree Instance {} with MAC TIME-OUT {} and Description {} ",
 225                         updateElanInstance, macTimeout, description);
 226             }
 227         } else {
 228             EtreeInstance etreeInstance = new EtreeInstanceBuilder().build();
 229             ElanInstance elanInstance = new ElanInstanceBuilder().setElanInstanceName(elanInstanceName)
 230                     .setMacTimeout(macTimeout).setDescription(description)
 231                     .withKey(new ElanInstanceKey(elanInstanceName))
 232                     .addAugmentation(EtreeInstance.class, etreeInstance).build();
 233             MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 234                     ElanHelper.getElanInstanceConfigurationDataPath(elanInstanceName), elanInstance);
 235             LOG.debug("Creating the new Etree Instance {}", elanInstance);
 236         }
 237         return isSuccess;
 238     }
 239
 240     @Override
 241     @Nullable
 242     public EtreeInterface getEtreeInterfaceByElanInterfaceName(String elanInterface) {
 243         return elanInterfaceCache.getEtreeInterface(elanInterface).orElse(null);
 244     }
 245
 246     public static boolean compareWithExistingElanInstance(ElanInstance existingElanInstance, long macTimeOut,
 247             String description) {
 248         boolean isEqual = false;
 249         if (existingElanInstance.getMacTimeout().longValue() == macTimeOut
 250                 && Objects.equals(existingElanInstance.getDescription(), description)) {
 251             isEqual = true;
 252         }
 253         return isEqual;
 254     }
 255
 256     @Override
 257     public void updateElanInstance(String elanInstanceName, long newMacTimout, String newDescription) {
 258         createElanInstance(elanInstanceName, newMacTimout, newDescription);
 259     }
 260
 261     @Override
 262     public boolean deleteEtreeInstance(String etreeInstanceName) {
 263         return deleteElanInstance(etreeInstanceName);
 264     }
 265
 266     @Override
 267     public boolean deleteElanInstance(String elanInstanceName) {
 268         Optional<ElanInstance> existingElanInstance = elanInstanceCache.get(elanInstanceName);
 269         if (!existingElanInstance.isPresent()) {
 270             LOG.debug("Elan Instance is not present for {}", elanInstanceName);
 271             return false;
 272         }
 273         LOG.debug("Deletion of the existing Elan Instance {}", existingElanInstance);
 274         ElanUtils.delete(broker, LogicalDatastoreType.CONFIGURATION,
 275                 ElanHelper.getElanInstanceConfigurationDataPath(elanInstanceName));
 276         return true;
 277     }
 278
 279     @Override
 280     public void addEtreeInterface(String etreeInstanceName, String interfaceName, EtreeInterfaceType interfaceType,
 281             List<String> staticMacAddresses, String description) {
 282         Optional<ElanInstance> existingElanInstance = elanInstanceCache.get(etreeInstanceName);
 283         if (existingElanInstance.isPresent()
 284                 && existingElanInstance.get().augmentation(EtreeInstance.class) != null) {
 285             EtreeInterface etreeInterface = new EtreeInterfaceBuilder().setEtreeInterfaceType(interfaceType).build();
 286             ElanInterface elanInterface;
 287             if (staticMacAddresses == null) {
 288                 elanInterface = new ElanInterfaceBuilder().setElanInstanceName(etreeInstanceName)
 289                         .setDescription(description).setName(interfaceName).withKey(new ElanInterfaceKey(interfaceName))
 290                         .addAugmentation(EtreeInterface.class, etreeInterface).build();
 291             } else {
 292                 List<StaticMacEntries> staticMacEntries = ElanUtils.getStaticMacEntries(staticMacAddresses);
 293                 elanInterface = new ElanInterfaceBuilder().setElanInstanceName(etreeInstanceName)
 294                         .setDescription(description).setName(interfaceName)
 295                         .setStaticMacEntries(staticMacEntries)
 296                         .withKey(new ElanInterfaceKey(interfaceName))
 297                         .addAugmentation(EtreeInterface.class, etreeInterface).build();
 298             }
 299             MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 300                     ElanUtils.getElanInterfaceConfigurationDataPathId(interfaceName), elanInterface);
 301             LOG.debug("Creating the new Etree Interface {}", elanInterface);
 302         }
 303     }
 304
 305     @Override
 306     public void addElanInterface(String elanInstanceName, String interfaceName,
 307             @Nullable List<String> staticMacAddresses, @Nullable String description) {
 308         Optional<ElanInstance> existingElanInstance = elanInstanceCache.get(elanInstanceName);
 309         if (existingElanInstance.isPresent()) {
 310             ElanInterfaceBuilder elanInterfaceBuilder = new ElanInterfaceBuilder()
 311                     .setElanInstanceName(elanInstanceName)
 312                     .setDescription(description).setName(interfaceName)
 313                     .withKey(new ElanInterfaceKey(interfaceName));
 314             if (staticMacAddresses != null) {
 315                 List<StaticMacEntries> staticMacEntries = ElanUtils.getStaticMacEntries(staticMacAddresses);
 316                 elanInterfaceBuilder.setStaticMacEntries(staticMacEntries);
 317             }
 318             ElanInterface elanInterface = elanInterfaceBuilder.build();
 319             MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 320                     ElanUtils.getElanInterfaceConfigurationDataPathId(interfaceName), elanInterface);
 321             LOG.debug("Created the new ELan Interface {}", elanInterface);
 322         }
 323     }
 324
 325     @Override
 326     public void updateElanInterface(String elanInstanceName, String interfaceName,
 327             List<String> updatedStaticMacAddresses, String newDescription) {
 328         Optional<ElanInterface> existingElanInterface = elanInterfaceCache.get(interfaceName);
 329         if (!existingElanInterface.isPresent()) {
 330             return;
 331         }
 332
 333         List<StaticMacEntries> updatedStaticMacEntries = ElanUtils.getStaticMacEntries(updatedStaticMacAddresses);
 334         LOG.debug("updating the ElanInterface with new Mac Entries {}", updatedStaticMacAddresses);
 335         ElanInterface elanInterface = new ElanInterfaceBuilder().setElanInstanceName(elanInstanceName)
 336                 .setName(interfaceName).setDescription(newDescription).setStaticMacEntries(updatedStaticMacEntries)
 337                 .withKey(new ElanInterfaceKey(interfaceName)).build();
 338         MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION,
 339                 ElanUtils.getElanInterfaceConfigurationDataPathId(interfaceName), elanInterface);
 340     }
 341
 342     @Override
 343     public void deleteEtreeInterface(String interfaceName) {
 344         deleteElanInterface(interfaceName);
 345         LOG.debug("deleting the Etree Interface {}", interfaceName);
 346     }
 347
 348     @Override
 349     public void deleteElanInterface(String interfaceName) {
 350         Optional<ElanInterface> existingElanInterface = elanInterfaceCache.get(interfaceName);
 351         if (existingElanInterface.isPresent()) {
 352             ElanUtils.delete(broker, LogicalDatastoreType.CONFIGURATION,
 353                     ElanUtils.getElanInterfaceConfigurationDataPathId(interfaceName));
 354             LOG.debug("deleting the Elan Interface {}", existingElanInterface);
 355         }
 356     }
 357
 358     @Override
 359     public void addStaticMacAddress(String interfaceName, String macAddress) {
 360         Optional<ElanInterface> existingElanInterface = elanInterfaceCache.get(interfaceName);
 361         if (existingElanInterface.isPresent()) {
 362             StaticMacEntriesBuilder staticMacEntriesBuilder = new StaticMacEntriesBuilder();
 363             StaticMacEntries staticMacEntry = staticMacEntriesBuilder.setMacAddress(
 364                     new PhysAddress(macAddress)).build();
 365             InstanceIdentifier<StaticMacEntries> staticMacEntriesIdentifier =
 366                     ElanUtils.getStaticMacEntriesCfgDataPathIdentifier(interfaceName, macAddress);
 367             MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION, staticMacEntriesIdentifier, staticMacEntry);
 368         }
 369     }
 370
 371     @Override
 372     public void deleteStaticMacAddress(String interfaceName, String macAddress) {
 373         Optional<ElanInterface> existingElanInterface = elanInterfaceCache.get(interfaceName);
 374         if (existingElanInterface.isPresent()) {
 375             InstanceIdentifier<StaticMacEntries> staticMacEntriesIdentifier =
 376                     ElanUtils.getStaticMacEntriesCfgDataPathIdentifier(interfaceName,
 377                     macAddress);
 378             MDSALUtil.syncDelete(broker, LogicalDatastoreType.CONFIGURATION, staticMacEntriesIdentifier);
 379         }
 380     }
 381
 382     @Override
 383     public Collection<MacEntry> getElanMacTable(String elanInstanceName) {
 384         Elan elanInfo = ElanUtils.getElanByName(broker, elanInstanceName);
 385         List<MacEntry> macAddress = new ArrayList<>();
 386         if (elanInfo == null) {
 387             return macAddress;
 388         }
 389         List<String> elanInterfaces = elanInfo.getElanInterfaces();
 390         if (elanInterfaces != null && elanInterfaces.size() > 0) {
 391             for (String elanInterface : elanInterfaces) {
 392                 ElanInterfaceMac elanInterfaceMac = elanUtils.getElanInterfaceMacByInterfaceName(elanInterface);
 393                 if (elanInterfaceMac != null && elanInterfaceMac.getMacEntry() != null
 394                         && elanInterfaceMac.getMacEntry().size() > 0) {
 395                     macAddress.addAll(elanInterfaceMac.getMacEntry());
 396                 }
 397             }
 398         }
 399         return macAddress;
 400     }
 401
 402     @Override
 403     public void flushMACTable(String elanInstanceName) {
 404         Elan elanInfo = ElanUtils.getElanByName(broker, elanInstanceName);
 405         if (elanInfo == null) {
 406             return;
 407         }
 408         List<String> elanInterfaces = elanInfo.getElanInterfaces();
 409         if (elanInterfaces == null || elanInterfaces.isEmpty()) {
 410             return;
 411         }
 412         for (String elanInterface : elanInterfaces) {
 413             ElanInterfaceMac elanInterfaceMac = elanUtils.getElanInterfaceMacByInterfaceName(elanInterface);
 414             if (elanInterfaceMac.getMacEntry() != null && elanInterfaceMac.getMacEntry().size() > 0) {
 415                 List<MacEntry> macEntries = elanInterfaceMac.getMacEntry();
 416                 for (MacEntry macEntry : macEntries) {
 417                     deleteStaticMacAddress(elanInterface, macEntry.getMacAddress().getValue());
 418                 }
 419             }
 420         }
 421
 422     }
 423
 424     @Override
 425     @Nullable
 426     public ElanInstance getElanInstance(String elanName) {
 427         return elanInstanceCache.get(elanName).orElse(null);
 428     }
 429
 430     @Override
 431     public List<ElanInstance> getElanInstances() {
 432         InstanceIdentifier<ElanInstances> elanInstancesIdentifier = InstanceIdentifier.builder(ElanInstances.class)
 433                 .build();
 434         return ElanUtils.read(broker, LogicalDatastoreType.CONFIGURATION, elanInstancesIdentifier).map(
 435                 ElanInstances::getElanInstance).orElse(emptyList());
 436     }
 437
 438     @Override
 439     @NonNull
 440     public List<String> getElanInterfaces(String elanInstanceName) {
 441         List<String> elanInterfaces = new ArrayList<>();
 442         InstanceIdentifier<ElanInterfaces> elanInterfacesIdentifier = InstanceIdentifier.builder(ElanInterfaces.class)
 443                 .build();
 444         Optional<ElanInterfaces> elanInterfacesOptional = ElanUtils.read(broker, LogicalDatastoreType.CONFIGURATION,
 445                 elanInterfacesIdentifier);
 446         if (!elanInterfacesOptional.isPresent()) {
 447             return elanInterfaces;
 448         }
 449         List<ElanInterface> elanInterfaceList = elanInterfacesOptional.get().nonnullElanInterface();
 450         for (ElanInterface elanInterface : elanInterfaceList) {
 451             if (Objects.equals(elanInterface.getElanInstanceName(), elanInstanceName)) {
 452                 elanInterfaces.add(elanInterface.getName());
 453             }
 454         }
 455         return elanInterfaces;
 456     }
 457
 458     @Override
 459     public void createExternalElanNetworks(Node node) {
 460         handleExternalElanNetworks(node, true, (elanInstance, interfaceName) -> {
 461             createExternalElanNetwork(elanInstance, interfaceName);
 462             return null;
 463         });
 464     }
 465
 466     @Override
 467     public void createExternalElanNetwork(ElanInstance elanInstance) {
 468         handleExternalElanNetwork(elanInstance, false, (elanInstance1, interfaceName) -> {
 469             createExternalElanNetwork(elanInstance1, interfaceName);
 470             return null;
 471         });
 472     }
 473
 474     protected void createExternalElanNetwork(ElanInstance elanInstance, Uint64 dpId) {
 475         String providerIntfName = bridgeMgr.getProviderInterfaceName(dpId, elanInstance.getPhysicalNetworkName());
 476         String intfName = providerIntfName + IfmConstants.OF_URI_SEPARATOR + elanInstance.getSegmentationId();
 477         Interface memberIntf = interfaceManager.getInterfaceInfoFromConfigDataStore(intfName);
 478         if (memberIntf == null) {
 479             LOG.debug("creating vlan prv intf in elan {}, dpn {}", elanInstance.getElanInstanceName(),
 480                     dpId);
 481             createExternalElanNetwork(elanInstance, providerIntfName);
 482         }
 483     }
 484
 485     private void createExternalElanNetwork(ElanInstance elanInstance, String interfaceName) {
 486         if (interfaceName == null) {
 487             LOG.trace("No physical interface is attached to {}", elanInstance.getPhysicalNetworkName());
 488             return;
 489         }
 490
 491         String elanInterfaceName = createIetfInterfaces(elanInstance, interfaceName);
 492         addElanInterface(elanInstance.getElanInstanceName(), elanInterfaceName, null, null);
 493     }
 494
 495     @Override
 496     public void updateExternalElanNetwork(ElanInstance elanInstance) {
 497         handleExternalElanNetwork(elanInstance, true, (elanInstance1, interfaceName) -> {
 498             createExternalElanNetwork(elanInstance1, interfaceName);
 499             return null;
 500         });
 501     }
 502
 503     @Override
 504     public void deleteExternalElanNetworks(Node node) {
 505         handleExternalElanNetworks(node, false, (elanInstance, interfaceName) -> {
 506             deleteExternalElanNetwork(elanInstance, interfaceName);
 507             return null;
 508         });
 509     }
 510
 511     @Override
 512     public void deleteExternalElanNetwork(ElanInstance elanInstance) {
 513         handleExternalElanNetwork(elanInstance, false, (elanInstance1, interfaceName) -> {
 514             deleteExternalElanNetwork(elanInstance1, interfaceName);
 515             return null;
 516         });
 517     }
 518
 519     protected void deleteExternalElanNetwork(ElanInstance elanInstance, Uint64 dpnId) {
 520         String providerIntfName = bridgeMgr.getProviderInterfaceName(dpnId, elanInstance.getPhysicalNetworkName());
 521         String intfName = providerIntfName + IfmConstants.OF_URI_SEPARATOR + elanInstance.getSegmentationId();
 522         Interface memberIntf = interfaceManager.getInterfaceInfoFromConfigDataStore(intfName);
 523         if (memberIntf != null) {
 524             deleteElanInterface(intfName);
 525             deleteIetfInterface(intfName);
 526             LOG.debug("delete vlan prv intf {} in elan {}, dpID {}", intfName,
 527                     elanInstance.getElanInstanceName(), dpnId);
 528         } else {
 529             LOG.debug("vlan prv intf {} not found in interfacemgr config DS", intfName);
 530         }
 531     }
 532
 533     private void deleteExternalElanNetwork(ElanInstance elanInstance, String interfaceName) {
 534         if (interfaceName == null) {
 535             LOG.trace("No physial interface is attached to {}", elanInstance.getPhysicalNetworkName());
 536             return;
 537         }
 538
 539         String elanInstanceName = elanInstance.getElanInstanceName();
 540         for (String elanInterface : getExternalElanInterfaces(elanInstanceName)) {
 541             if (elanInterface.startsWith(interfaceName)) {
 542                 if (ElanUtils.isVlan(elanInstance)) {
 543                     deleteIetfInterface(elanInterface);
 544                 }
 545                 String trunkInterfaceName = getTrunkInterfaceName(interfaceName);
 546                 if (shouldDeleteTrunk(trunkInterfaceName, elanInterface)) {
 547                     deleteIetfInterface(trunkInterfaceName);
 548                 }
 549                 deleteElanInterface(elanInterface);
 550             }
 551         }
 552     }
 553
 554     private boolean shouldDeleteTrunk(String trunkInterfaceName, String elanInterfaceName) {
 555         List<Interface> childInterfaces = interfaceManager.getChildInterfaces(trunkInterfaceName);
 556         if (childInterfaces == null || childInterfaces.isEmpty()
 557                 || childInterfaces.size() == 1 && elanInterfaceName.equals(childInterfaces.get(0).getName())) {
 558             LOG.debug("No more VLAN member interfaces left for trunk {}", trunkInterfaceName);
 559             return true;
 560         }
 561
 562         LOG.debug("Trunk interface {} has {} VLAN member interfaces left", trunkInterfaceName, childInterfaces.size());
 563         return false;
 564     }
 565
 566     @Override
 567     public void updateExternalElanNetworks(Node origNode, Node updatedNode) {
 568         if (!bridgeMgr.isIntegrationBridge(updatedNode)) {
 569             return;
 570         }
 571
 572         List<ElanInstance> elanInstances = getElanInstances();
 573         if (elanInstances == null || elanInstances.isEmpty()) {
 574             LOG.trace("No ELAN instances found");
 575             return;
 576         }
 577
 578         LOG.trace("updateExternalElanNetworks, orig bridge {} . updated bridge {}", origNode, updatedNode);
 579
 580         Map<String, String> origProviderMappping = getMapFromOtherConfig(origNode,
 581                 ElanBridgeManager.PROVIDER_MAPPINGS_KEY);
 582         Map<String, String> updatedProviderMappping = getMapFromOtherConfig(updatedNode,
 583                 ElanBridgeManager.PROVIDER_MAPPINGS_KEY);
 584
 585         boolean hasDatapathIdOnOrigNode = bridgeMgr.hasDatapathID(origNode);
 586         boolean hasDatapathIdOnUpdatedNode = bridgeMgr.hasDatapathID(updatedNode);
 587         Uint64 origDpnID = bridgeMgr.getDatapathId(origNode);
 588
 589         for (ElanInstance elanInstance : elanInstances) {
 590             String physicalNetworkName = elanInstance.getPhysicalNetworkName();
 591             boolean createExternalElanNw = true;
 592             if (physicalNetworkName != null) {
 593                 String origPortName = origProviderMappping.get(physicalNetworkName);
 594                 String updatedPortName = updatedProviderMappping.get(physicalNetworkName);
 595                 /**
 596                  * for internal vlan network, vlan provider interface creation should be
 597                  * triggered only if there is existing vlan provider intf indicating presence
 598                  * of VM ports on the DPN
 599                  */
 600                 if (hasDatapathIdOnOrigNode && !elanInstance.isExternal()
 601                         && ElanUtils.isVlan(elanInstance)) {
 602                     String externalIntf = getExternalElanInterface(elanInstance.getElanInstanceName(),
 603                             origDpnID);
 604                     if (externalIntf == null) {
 605                         createExternalElanNw = false;
 606                     }
 607                 }
 608                 if (hasPortNameRemoved(origPortName, updatedPortName)) {
 609                     deleteExternalElanNetwork(elanInstance,
 610                             bridgeMgr.getProviderInterfaceName(origNode, physicalNetworkName));
 611                 }
 612
 613                 if (createExternalElanNw && (hasPortNameUpdated(origPortName, updatedPortName)
 614                         || hasDatapathIdAdded(hasDatapathIdOnOrigNode, hasDatapathIdOnUpdatedNode))) {
 615                     createExternalElanNetwork(elanInstance,
 616                             bridgeMgr.getProviderInterfaceName(updatedNode, physicalNetworkName));
 617                 }
 618             }
 619         }
 620     }
 621
 622     private static boolean hasDatapathIdAdded(boolean hasDatapathIdOnOrigNode, boolean hasDatapathIdOnUpdatedNode) {
 623         return !hasDatapathIdOnOrigNode && hasDatapathIdOnUpdatedNode;
 624     }
 625
 626     private static boolean hasPortNameUpdated(String origPortName, String updatedPortName) {
 627         return updatedPortName != null && !updatedPortName.equals(origPortName);
 628     }
 629
 630     private static boolean hasPortNameRemoved(String origPortName, String updatedPortName) {
 631         return origPortName != null && !origPortName.equals(updatedPortName);
 632     }
 633
 634     private Map<String, String> getMapFromOtherConfig(Node node, String otherConfigColumn) {
 635         return bridgeMgr.getOpenvswitchOtherConfigMap(node, otherConfigColumn);
 636     }
 637
 638     @Override
 639     public Collection<String> getExternalElanInterfaces(String elanInstanceName) {
 640         List<String> elanInterfaces = getElanInterfaces(elanInstanceName);
 641         if (elanInterfaces.isEmpty()) {
 642             LOG.trace("No ELAN interfaces defined for {}", elanInstanceName);
 643             return Collections.emptySet();
 644         }
 645
 646         Set<String> externalElanInterfaces = new HashSet<>();
 647         for (String elanInterface : elanInterfaces) {
 648             if (interfaceManager.isExternalInterface(elanInterface)) {
 649                 externalElanInterfaces.add(elanInterface);
 650             }
 651         }
 652
 653         return externalElanInterfaces;
 654     }
 655
 656     @Override
 657     public String getExternalElanInterface(String elanInstanceName, Uint64 dpnId) {
 658         return elanUtils.getExternalElanInterface(elanInstanceName, dpnId);
 659     }
 660
 661     @Override
 662     public boolean isExternalInterface(String interfaceName) {
 663         return interfaceManager.isExternalInterface(interfaceName);
 664     }
 665
 666     @Override
 667     @Nullable
 668     public ElanInterface getElanInterfaceByElanInterfaceName(String interfaceName) {
 669         return elanInterfaceCache.get(interfaceName).orElse(null);
 670     }
 671
 672     @Override
 673     public void handleKnownL3DmacAddress(String macAddress, String elanInstanceName, int addOrRemove) {
 674         if (addOrRemove == NwConstants.ADD_FLOW) {
 675             addKnownL3DmacAddress(macAddress, elanInstanceName);
 676         } else {
 677             removeKnownL3DmacAddress(macAddress, elanInstanceName);
 678         }
 679     }
 680
 681     @Override
 682     public void addKnownL3DmacAddress(String macAddress, String elanInstanceName) {
 683         if (!isL2BeforeL3) {
 684             LOG.trace("ELAN service is after L3VPN in the Netvirt pipeline skip known L3DMAC flows installation");
 685             return;
 686         }
 687         ElanInstance elanInstance = elanInstanceCache.get(elanInstanceName).orElse(null);
 688         if (elanInstance == null) {
 689             LOG.warn("Null elan instance {}", elanInstanceName);
 690             return;
 691         }
 692
 693         List<Uint64> dpnsIdsForElanInstance = elanUtils.getParticipatingDpnsInElanInstance(elanInstanceName);
 694         if (dpnsIdsForElanInstance.isEmpty()) {
 695             LOG.warn("No DPNs for elan instance {}", elanInstance);
 696             return;
 697         }
 698
 699         elanUtils.addDmacRedirectToDispatcherFlows(elanInstance.getElanTag(), elanInstanceName, macAddress,
 700                 dpnsIdsForElanInstance);
 701     }
 702
 703     @Override
 704     public void removeKnownL3DmacAddress(String macAddress, String elanInstanceName) {
 705         if (!isL2BeforeL3) {
 706             LOG.trace("ELAN service is after L3VPN in the Netvirt pipeline skip known L3DMAC flows installation");
 707             return;
 708         }
 709         ElanInstance elanInstance = elanInstanceCache.get(elanInstanceName).orElse(null);
 710         if (elanInstance == null) {
 711             LOG.warn("Null elan instance {}", elanInstanceName);
 712             return;
 713         }
 714
 715         List<Uint64> dpnsIdsForElanInstance = elanUtils.getParticipatingDpnsInElanInstance(elanInstanceName);
 716         if (dpnsIdsForElanInstance.isEmpty()) {
 717             LOG.warn("No DPNs for elan instance {}", elanInstance);
 718             return;
 719         }
 720
 721         elanUtils.removeDmacRedirectToDispatcherFlows(elanInstance.getElanTag(),
 722             macAddress, dpnsIdsForElanInstance);
 723     }
 724
 725     /**
 726      * Create ietf-interfaces based on the ELAN segment type.<br>
 727      * For segment type flat - create transparent interface pointing to the
 728      * patch-port attached to the physnet port.<br>
 729      * For segment type vlan - create trunk interface pointing to the patch-port
 730      * attached to the physnet port + trunk-member interface pointing to the
 731      * trunk interface.
 732      *
 733      * @param elanInstance
 734      *            ELAN instance
 735      * @param parentRef
 736      *            parent interface name
 737      * @return the name of the interface to be added to the ELAN instance i.e.
 738      *         trunk-member name for vlan network and transparent for flat
 739      *         network or null otherwise
 740      */
 741     private String createIetfInterfaces(ElanInstance elanInstance, String parentRef) {
 742         String interfaceName = null;
 743
 744         try {
 745             String trunkName = getTrunkInterfaceName(parentRef);
 746             // trunk interface may have been created by other vlan network
 747             Interface trunkInterface = interfaceManager.getInterfaceInfoFromConfigDataStore(trunkName);
 748             if (trunkInterface == null) {
 749                 interfaceManager.createVLANInterface(trunkName, parentRef, null, null,
 750                         IfL2vlan.L2vlanMode.Trunk, true);
 751             }
 752             if (ElanUtils.isFlat(elanInstance)) {
 753                 interfaceName = trunkName;
 754             } else if (ElanUtils.isVlan(elanInstance)) {
 755                 Long segmentationId = elanInstance.getSegmentationId().toJava();
 756                 interfaceName = parentRef + IfmConstants.OF_URI_SEPARATOR + segmentationId;
 757                 interfaceManager.createVLANInterface(interfaceName, trunkName, segmentationId.intValue(), null,
 758                         IfL2vlan.L2vlanMode.TrunkMember, true);
 759             }
 760         } catch (InterfaceAlreadyExistsException e) {
 761             LOG.trace("Interface {} was already created", interfaceName);
 762         }
 763
 764         return interfaceName;
 765     }
 766
 767     private void deleteIetfInterface(String interfaceName) {
 768         InterfaceKey interfaceKey = new InterfaceKey(interfaceName);
 769         InstanceIdentifier<Interface> interfaceInstanceIdentifier = InstanceIdentifier.builder(Interfaces.class)
 770                 .child(Interface.class, interfaceKey).build();
 771         MDSALUtil.syncDelete(broker, LogicalDatastoreType.CONFIGURATION, interfaceInstanceIdentifier);
 772         LOG.debug("Deleting IETF interface {}", interfaceName);
 773     }
 774
 775     private void handleExternalElanNetworks(Node node, boolean skipIntVlanNw,
 776                                             BiFunction<ElanInstance, String, Void> function) {
 777         if (!bridgeMgr.isIntegrationBridge(node)) {
 778             return;
 779         }
 780
 781         List<ElanInstance> elanInstances = getElanInstances();
 782         if (elanInstances == null || elanInstances.isEmpty()) {
 783             LOG.trace("No ELAN instances found");
 784             return;
 785         }
 786
 787         for (ElanInstance elanInstance : elanInstances) {
 788             if (skipIntVlanNw && !elanInstance.isExternal() && ElanUtils.isVlan(elanInstance)) {
 789                 continue;
 790             }
 791             String interfaceName = bridgeMgr.getProviderInterfaceName(node, elanInstance.getPhysicalNetworkName());
 792             if (interfaceName != null) {
 793                 function.apply(elanInstance, interfaceName);
 794             }
 795         }
 796     }
 797
 798     private void handleExternalElanNetwork(ElanInstance elanInstance, boolean update,
 799                                            BiFunction<ElanInstance, String, Void> function) {
 800         String elanInstanceName = elanInstance.getElanInstanceName();
 801         boolean isFlatOrVlanNetwork = (ElanUtils.isFlat(elanInstance) || ElanUtils.isVlan(elanInstance));
 802         if (!isFlatOrVlanNetwork) {
 803             LOG.error("Network is not of type FLAT/VLAN."
 804                     + "Ignoring Elan-interface creation for given ProviderInterface {}",
 805                 elanInstance.getPhysicalNetworkName());
 806             return;
 807         }
 808         if (elanInstance.getPhysicalNetworkName() == null) {
 809             LOG.trace("No physical network attached to {}", elanInstanceName);
 810             return;
 811         }
 812
 813         List<Node> nodes = southboundUtils.getOvsdbNodes();
 814         if (nodes == null || nodes.isEmpty()) {
 815             LOG.trace("No OVS nodes found while creating external network for ELAN {}",
 816                     elanInstance.getElanInstanceName());
 817             return;
 818         }
 819
 820         for (Node node : nodes) {
 821             if (bridgeMgr.isIntegrationBridge(node)) {
 822                 if (update && !elanInstance.isExternal()) {
 823                     DpnInterfaces dpnInterfaces = elanUtils.getElanInterfaceInfoByElanDpn(elanInstanceName,
 824                             bridgeMgr.getDatapathId(node));
 825                     if (dpnInterfaces == null || dpnInterfaces.getInterfaces().isEmpty()) {
 826                         continue;
 827                     }
 828                 }
 829                 String interfaceName = bridgeMgr.getProviderInterfaceName(node, elanInstance.getPhysicalNetworkName());
 830                 function.apply(elanInstance, interfaceName);
 831             }
 832         }
 833     }
 834
 835     private static String getTrunkInterfaceName(String parentRef) {
 836         return parentRef + IfmConstants.OF_URI_SEPARATOR + "trunk";
 837     }
 838
 839     private void setIsL2BeforeL3() {
 840         short elanServiceRealIndex = ServiceIndex.getIndex(NwConstants.ELAN_SERVICE_NAME,
 841                 NwConstants.ELAN_SERVICE_INDEX);
 842         short l3vpnServiceRealIndex = ServiceIndex.getIndex(NwConstants.L3VPN_SERVICE_NAME,
 843                 NwConstants.L3VPN_SERVICE_INDEX);
 844         if (elanServiceRealIndex < l3vpnServiceRealIndex) {
 845             LOG.info("ELAN service is set before L3VPN service in the Netvirt pipeline");
 846             isL2BeforeL3 = true;
 847         } else {
 848             LOG.info("ELAN service is set after L3VPN service in the Netvirt pipeline");
 849             isL2BeforeL3 = false;
 850         }
 851     }
 852
 853     @Override
 854     public void addArpResponderFlow(ArpResponderInput arpResponderInput) {
 855         String ingressInterfaceName = arpResponderInput.getInterfaceName();
 856         String macAddress = arpResponderInput.getSha();
 857         String ipAddress = arpResponderInput.getSpa();
 858         int lportTag = arpResponderInput.getLportTag();
 859         Uint64 dpnId = Uint64.valueOf(arpResponderInput.getDpId());
 860
 861         LOG.info("Installing the ARP responder flow on DPN {} for Interface {} with MAC {} & IP {}", dpnId,
 862                 ingressInterfaceName, macAddress, ipAddress);
 863         Optional<ElanInterface> elanIface = elanInterfaceCache.get(ingressInterfaceName);
 864         ElanInstance elanInstance = elanIface.isPresent()
 865                 ? elanInstanceCache.get(elanIface.get().getElanInstanceName()).orElse(null) : null;
 866         if (elanInstance == null) {
 867             LOG.debug("addArpResponderFlow: elanInstance is null, Failed to install arp responder flow for dpnId {}"
 868                     + "for Interface {} with MAC {} & IP {}", dpnId, ingressInterfaceName, macAddress, ipAddress);
 869             return;
 870         }
 871         String flowId = ArpResponderUtil.getFlowId(lportTag, ipAddress);
 872         Flow flowEntity =
 873             MDSALUtil.buildFlowNew(NwConstants.ARP_RESPONDER_TABLE, flowId, NwConstants.DEFAULT_ARP_FLOW_PRIORITY,
 874                 flowId, 0, 0,
 875                 ArpResponderUtil.generateCookie(lportTag, ipAddress),
 876                 ArpResponderUtil.getMatchCriteria(lportTag, elanInstance, ipAddress),
 877                 arpResponderInput.getInstructions());
 878         LoggingFutures.addErrorLogging(txRunner.callWithNewWriteOnlyTransactionAndSubmit(Datastore.CONFIGURATION,
 879             tx -> mdsalManager.addFlow(tx, dpnId, flowEntity)), LOG, "Error adding flow {}", flowEntity);
 880         LOG.info("Installed the ARP Responder flow for Interface {}", ingressInterfaceName);
 881     }
 882
 883     @Override
 884     public void addExternalTunnelArpResponderFlow(ArpResponderInput arpResponderInput, String elanInstanceName) {
 885         Uint64 dpnId = Uint64.valueOf(arpResponderInput.getDpId());
 886         String ipAddress = arpResponderInput.getSpa();
 887         String macAddress = arpResponderInput.getSha();
 888
 889         LOG.trace("Installing the ExternalTunnel ARP responder flow on DPN {} for ElanInstance {} with MAC {} & IP {}",
 890                 dpnId, elanInstanceName, macAddress, ipAddress);
 891
 892         ElanInstance elanInstance = elanInstanceCache.get(elanInstanceName).orElse(null);
 893         if (elanInstance == null) {
 894             LOG.warn("Null elan instance {}", elanInstanceName);
 895             return;
 896         }
 897
 898         int lportTag = arpResponderInput.getLportTag();
 899         String flowId = ArpResponderUtil.getFlowId(lportTag, ipAddress);
 900         Flow flowEntity =
 901             MDSALUtil.buildFlowNew(NwConstants.ARP_RESPONDER_TABLE, flowId, NwConstants.DEFAULT_ARP_FLOW_PRIORITY,
 902                 flowId, 0, 0,
 903                 ArpResponderUtil.generateCookie(lportTag, ipAddress),
 904                 ArpResponderUtil.getMatchCriteria(lportTag, elanInstance, ipAddress),
 905                 arpResponderInput.getInstructions());
 906         LoggingFutures.addErrorLogging(txRunner.callWithNewWriteOnlyTransactionAndSubmit(Datastore.CONFIGURATION,
 907             tx -> mdsalManager.addFlow(tx, dpnId, flowEntity)), LOG, "Error adding flow {}", flowEntity);
 908         LOG.trace("Installed the ExternalTunnel ARP Responder flow for ElanInstance {}", elanInstanceName);
 909     }
 910
 911     @Override
 912     public void removeArpResponderFlow(ArpResponderInput arpResponderInput) {
 913         elanUtils.removeArpResponderFlow(Uint64.valueOf(arpResponderInput.getDpId()),
 914                 arpResponderInput.getInterfaceName(),
 915                 arpResponderInput.getSpa(), arpResponderInput.getLportTag());
 916     }
 917
 918     /**
 919      * Uses the IdManager to retrieve a brand new ElanTag.
 920      *
 921      * @param idKey
 922      *            the id key
 923      * @return the integer
 924      */
 925     @Override
 926     public Uint32 retrieveNewElanTag(String idKey) {
 927         return ElanUtils.retrieveNewElanTag(idManager, idKey);
 928     }
 929
 930     @Override
 931     public InstanceIdentifier<DpnInterfaces> getElanDpnInterfaceOperationalDataPath(
 932                                                                 String elanInstanceName, Uint64 dpnId) {
 933         return ElanUtils.getElanDpnInterfaceOperationalDataPath(elanInstanceName, dpnId);
 934     }
 935
 936     @Override
 937     public DpnInterfaces getElanInterfaceInfoByElanDpn(String elanInstanceName, Uint64 dpId) {
 938         return elanUtils.getElanInterfaceInfoByElanDpn(elanInstanceName, dpId);
 939     }
 940
 941 }