/* * Copyright (c) 2016, 2017 Ericsson India Global Services Pvt Ltd. and others. All rights reserved. * * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html */ package org.opendaylight.netvirt.elan.internal; import java.math.BigInteger; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.List; import javax.annotation.PostConstruct; import javax.inject.Inject; import javax.inject.Singleton; import org.opendaylight.controller.md.sal.binding.api.DataBroker; import org.opendaylight.controller.md.sal.binding.api.WriteTransaction; import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType; import org.opendaylight.genius.datastoreutils.AsyncDataTreeChangeListenerBase; import org.opendaylight.genius.infra.ManagedNewTransactionRunner; import org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl; import org.opendaylight.genius.mdsalutil.ActionInfo; import org.opendaylight.genius.mdsalutil.BucketInfo; import org.opendaylight.genius.mdsalutil.FlowEntity; import org.opendaylight.genius.mdsalutil.InstructionInfo; import org.opendaylight.genius.mdsalutil.MDSALUtil; import org.opendaylight.genius.mdsalutil.MatchInfo; import org.opendaylight.genius.mdsalutil.MatchInfoBase; import org.opendaylight.genius.mdsalutil.MetaDataUtil; import org.opendaylight.genius.mdsalutil.NwConstants; import org.opendaylight.genius.mdsalutil.NwConstants.NxmOfFieldType; import org.opendaylight.genius.mdsalutil.actions.ActionDrop; import org.opendaylight.genius.mdsalutil.actions.ActionGroup; import org.opendaylight.genius.mdsalutil.actions.ActionLearn; import org.opendaylight.genius.mdsalutil.actions.ActionLearn.CopyFromValue; import org.opendaylight.genius.mdsalutil.actions.ActionLearn.MatchFromField; import org.opendaylight.genius.mdsalutil.actions.ActionLearn.MatchFromValue; import org.opendaylight.genius.mdsalutil.actions.ActionNxResubmit; import org.opendaylight.genius.mdsalutil.actions.ActionPuntToController; import org.opendaylight.genius.mdsalutil.actions.ActionRegLoad; import org.opendaylight.genius.mdsalutil.instructions.InstructionApplyActions; import org.opendaylight.genius.mdsalutil.instructions.InstructionGotoTable; import org.opendaylight.genius.mdsalutil.interfaces.IMdsalApiManager; import org.opendaylight.genius.mdsalutil.matches.MatchArpOp; import org.opendaylight.genius.mdsalutil.matches.MatchEthernetDestination; import org.opendaylight.genius.mdsalutil.matches.MatchEthernetType; import org.opendaylight.genius.mdsalutil.nxmatches.NxMatchRegister; import org.opendaylight.infrautils.jobcoordinator.JobCoordinator; import org.opendaylight.netvirt.elan.arp.responder.ArpResponderConstant; import org.opendaylight.netvirt.elan.arp.responder.ArpResponderUtil; import org.opendaylight.netvirt.elan.utils.ElanConstants; import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.MacAddress; import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService; import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId; import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes; import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node; import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.config.rev150710.ElanConfig; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflowjava.nx.match.rev140421.NxmNxReg4; import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; import org.slf4j.Logger; import org.slf4j.LoggerFactory; @Singleton public class ElanNodeListener extends AsyncDataTreeChangeListenerBase { private static final Logger LOG = LoggerFactory.getLogger(ElanNodeListener.class); private static final int LEARN_MATCH_REG4_VALUE = 1; private static final int ARP_LEARN_FLOW_PRIORITY = 10; private static final int ARP_LEARN_MATCH_VALUE = 0x1; private static final int GARP_LEARN_MATCH_VALUE = 0x101; private static final long ARP_LEARN_MATCH_MASK = 0xFFFFL; private final DataBroker broker; private final ManagedNewTransactionRunner txRunner; private final IMdsalApiManager mdsalManager; private final IdManagerService idManagerService; private final int tempSmacLearnTimeout; private final int arpPuntTimeout; private final boolean puntLldpToController; private final JobCoordinator jobCoordinator; @Inject public ElanNodeListener(DataBroker dataBroker, IMdsalApiManager mdsalManager, ElanConfig elanConfig, IdManagerService idManagerService, JobCoordinator jobCoordinator) { this.broker = dataBroker; this.txRunner = new ManagedNewTransactionRunnerImpl(dataBroker); this.mdsalManager = mdsalManager; this.tempSmacLearnTimeout = elanConfig.getTempSmacLearnTimeout(); this.arpPuntTimeout = elanConfig.getArpPuntTimeout().intValue(); this.puntLldpToController = elanConfig.isPuntLldpToController(); this.idManagerService = idManagerService; this.jobCoordinator = jobCoordinator; } @Override @PostConstruct public void init() { registerListener(LogicalDatastoreType.OPERATIONAL, broker); } @Override protected InstanceIdentifier getWildCardPath() { return InstanceIdentifier.create(Nodes.class).child(Node.class); } @Override protected void remove(InstanceIdentifier identifier, Node del) { } @Override protected void update(InstanceIdentifier identifier, Node original, Node update) { } @Override protected void add(InstanceIdentifier identifier, Node add) { NodeId nodeId = add.getId(); String[] node = nodeId.getValue().split(":"); if (node.length < 2) { LOG.warn("Unexpected nodeId {}", nodeId.getValue()); return; } BigInteger dpId = new BigInteger(node[1]); createTableMissEntry(dpId); createMulticastFlows(dpId); createArpDefaultFlowsForArpCheckTable(dpId); } private void createArpDefaultFlowsForArpCheckTable(BigInteger dpId) { jobCoordinator.enqueueJob("ARP_CHECK_TABLE-" + dpId.toString(), () -> Collections.singletonList(txRunner.callWithNewWriteOnlyTransactionAndSubmit(tx -> { LOG.debug("Received notification to install Arp Check Default entries for dpn {} ", dpId); createArpRequestMatchFlows(dpId, tx); createArpResponseMatchFlows(dpId, tx); createArpPuntAndLearnFlow(dpId, tx); addGarpLearnMatchFlow(dpId, tx); addArpLearnMatchFlow(dpId, tx); }))); } public void createTableMissEntry(BigInteger dpnId) { setupTableMissSmacFlow(dpnId); setupTableMissDmacFlow(dpnId); setupTableMissArpCheckFlow(dpnId); setupTableMissApResponderFlow(dpnId); setupExternalL2vniTableMissFlow(dpnId); } private void createMulticastFlows(BigInteger dpId) { createL2ControlProtocolDropFlows(dpId); createMulticastPuntFlows(dpId); } private void createMulticastPuntFlows(BigInteger dpId) { if (puntLldpToController) { createLldpFlows(dpId); } } private void createLldpFlows(BigInteger dpId) { createLldpFlow(dpId, ElanConstants.LLDP_DST_1, "LLDP dMac Table Flow 1"); createLldpFlow(dpId, ElanConstants.LLDP_DST_2, "LLDP dMac Table Flow 2"); createLldpFlow(dpId, ElanConstants.LLDP_DST_3, "LLDP dMac Table Flow 3"); } private void createLldpFlow(BigInteger dpId, String dstMac, String flowName) { List mkMatches = new ArrayList<>(); mkMatches.add(new MatchEthernetType(ElanConstants.LLDP_ETH_TYPE)); mkMatches.add(new MatchEthernetDestination(new MacAddress(dstMac))); List listActionInfo = new ArrayList<>(); listActionInfo.add(new ActionPuntToController()); List mkInstructions = new ArrayList<>(); mkInstructions.add(new InstructionApplyActions(listActionInfo)); String flowId = dpId.toString() + NwConstants.ELAN_DMAC_TABLE + "lldp" + ElanConstants.LLDP_ETH_TYPE + dstMac; FlowEntity lldpFlow = MDSALUtil.buildFlowEntity(dpId, NwConstants.ELAN_DMAC_TABLE, flowId, 16, flowName, 0, 0, ElanConstants.COOKIE_ELAN_KNOWN_DMAC, mkMatches, mkInstructions); mdsalManager.installFlow(lldpFlow); } private void setupTableMissSmacFlow(BigInteger dpId) { List actionsInfos = new ArrayList<>(); actionsInfos.add(new ActionPuntToController()); actionsInfos.add(new ActionLearn(0, tempSmacLearnTimeout, 0, ElanConstants.COOKIE_ELAN_LEARNED_SMAC, 0, NwConstants.ELAN_SMAC_LEARNED_TABLE, 0, 0, Arrays.asList( new ActionLearn.MatchFromField(NwConstants.NxmOfFieldType.NXM_OF_ETH_SRC.getType(), NwConstants.NxmOfFieldType.NXM_OF_ETH_SRC.getType(), NwConstants.NxmOfFieldType.NXM_OF_ETH_SRC.getFlowModHeaderLenInt()), new ActionLearn.MatchFromField(NwConstants.NxmOfFieldType.NXM_NX_REG1.getType(), NwConstants.NxmOfFieldType.NXM_NX_REG1.getType(), ElanConstants.INTERFACE_TAG_LENGTH), new ActionLearn.CopyFromValue(LEARN_MATCH_REG4_VALUE, NwConstants.NxmOfFieldType.NXM_NX_REG4.getType(), 8)))); List mkInstructions = new ArrayList<>(); mkInstructions.add(new InstructionApplyActions(actionsInfos)); mkInstructions.add(new InstructionGotoTable(NwConstants.ELAN_DMAC_TABLE)); List mkMatches = new ArrayList<>(); FlowEntity flowEntity = MDSALUtil.buildFlowEntity(dpId, NwConstants.ELAN_SMAC_TABLE, getTableMissFlowRef(NwConstants.ELAN_SMAC_TABLE), 0, "ELAN sMac Table Miss Flow", 0, 0, ElanConstants.COOKIE_ELAN_KNOWN_SMAC, mkMatches, mkInstructions); mdsalManager.installFlow(flowEntity); addSmacBaseTableFlow(dpId); addSmacLearnedTableFlow(dpId); } private void addSmacBaseTableFlow(BigInteger dpId) { // T48 - resubmit to T49 & T50 List actionsInfo = new ArrayList<>(); actionsInfo.add(new ActionNxResubmit(NwConstants.ELAN_SMAC_LEARNED_TABLE)); actionsInfo.add(new ActionNxResubmit(NwConstants.ELAN_SMAC_TABLE)); List mkInstruct = new ArrayList<>(); mkInstruct.add(new InstructionApplyActions(actionsInfo)); List mkMatch = new ArrayList<>(); FlowEntity doubleResubmitTable = MDSALUtil.buildFlowEntity(dpId, NwConstants.ELAN_BASE_TABLE, getTableMissFlowRef(NwConstants.ELAN_BASE_TABLE), 0, "Elan sMac resubmit table", 0, 0, ElanConstants.COOKIE_ELAN_BASE_SMAC, mkMatch, mkInstruct); mdsalManager.installFlow(doubleResubmitTable); } private void addSmacLearnedTableFlow(BigInteger dpId) { // T50 - match on Reg4 and goto T51 List mkMatches = new ArrayList<>(); mkMatches.add(new NxMatchRegister(NxmNxReg4.class, LEARN_MATCH_REG4_VALUE)); List mkInstructions = new ArrayList<>(); mkInstructions.add(new InstructionGotoTable(NwConstants.ELAN_DMAC_TABLE)); String flowRef = new StringBuffer().append(NwConstants.ELAN_SMAC_TABLE).append(NwConstants.FLOWID_SEPARATOR) .append(LEARN_MATCH_REG4_VALUE).toString(); FlowEntity flowEntity = MDSALUtil.buildFlowEntity(dpId, NwConstants.ELAN_SMAC_TABLE, flowRef, 10, "ELAN sMac Table Reg4 Flow", 0, 0, ElanConstants.COOKIE_ELAN_KNOWN_SMAC.add(BigInteger.valueOf(LEARN_MATCH_REG4_VALUE)), mkMatches, mkInstructions); mdsalManager.installFlow(flowEntity); } private void setupTableMissDmacFlow(BigInteger dpId) { List mkMatches = new ArrayList<>(); List mkInstructions = new ArrayList<>(); mkInstructions.add(new InstructionGotoTable(NwConstants.ELAN_UNKNOWN_DMAC_TABLE)); FlowEntity flowEntity = MDSALUtil.buildFlowEntity(dpId, NwConstants.ELAN_DMAC_TABLE, getTableMissFlowRef(NwConstants.ELAN_DMAC_TABLE), 0, "ELAN dMac Table Miss Flow", 0, 0, ElanConstants.COOKIE_ELAN_KNOWN_DMAC, mkMatches, mkInstructions); mdsalManager.installFlow(flowEntity); } private void setupExternalL2vniTableMissFlow(BigInteger dpnId) { List matches = new ArrayList<>(); List actionsInfos = Collections.singletonList(new ActionNxResubmit(NwConstants .LPORT_DISPATCHER_TABLE)); List instructions = Collections.singletonList(new InstructionApplyActions(actionsInfos)); FlowEntity flowEntity = MDSALUtil.buildFlowEntity(dpnId, NwConstants.L2VNI_EXTERNAL_TUNNEL_DEMUX_TABLE, getTableMissFlowRef(NwConstants.L2VNI_EXTERNAL_TUNNEL_DEMUX_TABLE), 0, "External L2VNI Table Miss Flow", 0, 0, ElanConstants.COOKIE_L2VNI_DEMUX, matches, instructions); mdsalManager.installFlow(flowEntity); } private void createL2ControlProtocolDropFlows(BigInteger dpId) { List mkMatches = new ArrayList<>(); MatchEthernetDestination matchEthDst = new MatchEthernetDestination(new MacAddress(ElanConstants.L2_CONTROL_PACKETS_DMAC), new MacAddress(ElanConstants.L2_CONTROL_PACKETS_DMAC_MASK)); mkMatches.add(matchEthDst); List listActionInfo = new ArrayList<>(); listActionInfo.add(new ActionDrop()); List mkInstructions = new ArrayList<>(); mkInstructions.add(new InstructionApplyActions(listActionInfo)); String flowId = dpId.toString() + NwConstants.ELAN_DMAC_TABLE + "l2control" + ElanConstants.L2_CONTROL_PACKETS_DMAC + ElanConstants.L2_CONTROL_PACKETS_DMAC_MASK; FlowEntity flow = MDSALUtil.buildFlowEntity(dpId, NwConstants.ELAN_DMAC_TABLE, flowId, 15, "L2 control packets dMac Table Flow", 0, 0, ElanConstants.COOKIE_ELAN_KNOWN_DMAC, mkMatches, mkInstructions); mdsalManager.installFlow(flow); } private String getTableMissFlowRef(long tableId) { return new StringBuffer().append(tableId).toString(); } @Override protected ElanNodeListener getDataTreeChangeListener() { return ElanNodeListener.this; } private void setupTableMissApResponderFlow(final BigInteger dpnId) { mdsalManager.installFlow(dpnId, ArpResponderUtil.getArpResponderTableMissFlow(dpnId)); } private void setupTableMissArpCheckFlow(BigInteger dpnId) { mdsalManager.installFlow(dpnId, MDSALUtil.buildFlowEntity(dpnId, NwConstants.ARP_CHECK_TABLE, String.valueOf("L2.ELAN." + NwConstants.ARP_CHECK_TABLE), NwConstants.TABLE_MISS_PRIORITY, ArpResponderConstant.DROP_FLOW_NAME.value(), 0, 0, NwConstants.COOKIE_ARP_RESPONDER, new ArrayList(), Collections.singletonList(new InstructionGotoTable(NwConstants.ELAN_BASE_TABLE)))); } private void createArpRequestMatchFlows(BigInteger dpId, WriteTransaction writeFlowTx) { long arpRequestGroupId = ArpResponderUtil.retrieveStandardArpResponderGroupId(idManagerService); List buckets = ArpResponderUtil.getDefaultBucketInfos(NwConstants.ARP_RESPONDER_TABLE); ArpResponderUtil.installGroup(mdsalManager, dpId, arpRequestGroupId, ArpResponderConstant.GROUP_FLOW_NAME.value(), buckets); FlowEntity arpReqArpCheckTbl = ArpResponderUtil.createArpDefaultFlow(dpId, NwConstants.ARP_CHECK_TABLE, NwConstants.ARP_REQUEST, () -> Arrays.asList(MatchEthernetType.ARP, MatchArpOp.REQUEST), () -> Arrays.asList(new ActionGroup(arpRequestGroupId), new ActionNxResubmit(NwConstants.ARP_LEARN_TABLE_1), new ActionNxResubmit(NwConstants.ARP_LEARN_TABLE_2), new ActionNxResubmit(NwConstants.ELAN_BASE_TABLE))); LOG.trace("Invoking MDSAL to install Arp Rquest Match Flow for table {}", NwConstants.ARP_CHECK_TABLE); mdsalManager.addFlowToTx(arpReqArpCheckTbl, writeFlowTx); } private void createArpResponseMatchFlows(BigInteger dpId, WriteTransaction writeFlowTx) { FlowEntity arpRepArpCheckTbl = ArpResponderUtil.createArpDefaultFlow(dpId, NwConstants.ARP_CHECK_TABLE, NwConstants.ARP_REPLY, () -> Arrays.asList(MatchEthernetType.ARP, MatchArpOp.REPLY), () -> Arrays.asList(new ActionNxResubmit(NwConstants.ARP_LEARN_TABLE_1), new ActionNxResubmit(NwConstants.ARP_LEARN_TABLE_2), new ActionNxResubmit(NwConstants.ELAN_BASE_TABLE))); LOG.trace("Invoking MDSAL to install Arp Reply Match Flow for Table {} ", NwConstants.ARP_CHECK_TABLE); mdsalManager.addFlowToTx(arpRepArpCheckTbl, writeFlowTx); } private void createArpPuntAndLearnFlow(BigInteger dpId, WriteTransaction writeFlowTx) { LOG.debug("adding arp punt and learn entry in table {}", NwConstants.ARP_LEARN_TABLE_1); List matches = new ArrayList<>(); List actions = new ArrayList<>(); BigInteger cookie = new BigInteger("88880000", 16); matches.add(MatchEthernetType.ARP); actions.add(new ActionPuntToController()); if (arpPuntTimeout != 0) { actions.add(new ActionLearn(0, arpPuntTimeout, ARP_LEARN_FLOW_PRIORITY, cookie, 0, NwConstants.ARP_LEARN_TABLE_1, 0, 0, Arrays.asList( new MatchFromValue(NwConstants.ETHTYPE_ARP, NxmOfFieldType.NXM_OF_ETH_TYPE.getType(), NxmOfFieldType.NXM_OF_ETH_TYPE.getFlowModHeaderLenInt()), new MatchFromField(NxmOfFieldType.NXM_OF_ARP_SPA.getType(), NxmOfFieldType.NXM_OF_ARP_SPA.getType(), NxmOfFieldType.NXM_OF_ARP_SPA.getFlowModHeaderLenInt()), new MatchFromField(NxmOfFieldType.NXM_OF_ARP_TPA.getType(), NxmOfFieldType.NXM_OF_ARP_TPA.getType(), NxmOfFieldType.NXM_OF_ARP_TPA.getFlowModHeaderLenInt()), new ActionLearn.MatchFromField(NxmOfFieldType.OXM_OF_METADATA.getType(), MetaDataUtil.METADATA_ELAN_TAG_OFFSET, NxmOfFieldType.OXM_OF_METADATA.getType(), MetaDataUtil.METADATA_ELAN_TAG_OFFSET, ElanConstants.ELAN_TAG_LENGTH), new CopyFromValue(1, NxmOfFieldType.NXM_NX_REG4.getType(), 8)))); actions.add(new ActionLearn(0, arpPuntTimeout, ARP_LEARN_FLOW_PRIORITY, cookie, 0, NwConstants.ARP_LEARN_TABLE_2, 0, 0, Arrays.asList( new MatchFromValue(NwConstants.ETHTYPE_ARP, NxmOfFieldType.NXM_OF_ETH_TYPE.getType(), NxmOfFieldType.NXM_OF_ETH_TYPE.getFlowModHeaderLenInt()), new MatchFromField(NxmOfFieldType.NXM_OF_ARP_SPA.getType(), NxmOfFieldType.NXM_OF_ARP_TPA.getType(), NxmOfFieldType.NXM_OF_ARP_SPA.getFlowModHeaderLenInt()), new MatchFromField(NxmOfFieldType.NXM_OF_ARP_TPA.getType(), NxmOfFieldType.NXM_OF_ARP_SPA.getType(), NxmOfFieldType.NXM_OF_ARP_TPA.getFlowModHeaderLenInt()), new ActionLearn.MatchFromField(NxmOfFieldType.OXM_OF_METADATA.getType(), MetaDataUtil.METADATA_ELAN_TAG_OFFSET, NxmOfFieldType.OXM_OF_METADATA.getType(), MetaDataUtil.METADATA_ELAN_TAG_OFFSET, MetaDataUtil.METADATA_ELAN_TAG_BITLEN), new CopyFromValue(1, NxmOfFieldType.NXM_NX_REG4.getType(), 8, 8)))); } List instructions = new ArrayList<>(); instructions.add(new InstructionApplyActions(actions)); String flowid = String.valueOf(NwConstants.ARP_LEARN_TABLE_1) + NwConstants.FLOWID_SEPARATOR + "arp.punt"; FlowEntity flow = MDSALUtil.buildFlowEntity(dpId, NwConstants.ARP_LEARN_TABLE_1, flowid, NwConstants.TABLE_MISS_PRIORITY, "arp punt/learn flow", 0, 0, cookie, matches, instructions); mdsalManager.addFlowToTx(flow, writeFlowTx); } private void addGarpLearnMatchFlow(BigInteger dpId, WriteTransaction writeFlowTx) { List actions = new ArrayList<>(); List matches = new ArrayList<>(); matches.add(MatchEthernetType.ARP); matches.add(new NxMatchRegister(NxmNxReg4.class, GARP_LEARN_MATCH_VALUE, ARP_LEARN_MATCH_MASK)); actions.add(new ActionRegLoad(NxmNxReg4.class, 0, 31, 0)); actions.add(new ActionPuntToController()); actions.add(new ActionNxResubmit(NwConstants.ELAN_SMAC_LEARNED_TABLE)); actions.add(new ActionNxResubmit(NwConstants.ELAN_SMAC_TABLE)); List instructions = new ArrayList<>(); instructions.add(new InstructionApplyActions(actions)); String flowid = String.valueOf(NwConstants.ELAN_BASE_TABLE) + NwConstants.FLOWID_SEPARATOR + "garp.match"; FlowEntity garpFlow = MDSALUtil.buildFlowEntity(dpId, NwConstants.ELAN_BASE_TABLE, flowid, NwConstants.DEFAULT_ARP_FLOW_PRIORITY, "GARP learn match flow", 0, 0, ElanConstants.COOKIE_ELAN_BASE_SMAC, matches, instructions); mdsalManager.addFlowToTx(garpFlow, writeFlowTx); } private void addArpLearnMatchFlow(BigInteger dpId, WriteTransaction writeFlowTx) { List actions = new ArrayList<>(); List matches = new ArrayList<>(); matches.add(MatchEthernetType.ARP); matches.add(new NxMatchRegister(NxmNxReg4.class, ARP_LEARN_MATCH_VALUE, ARP_LEARN_MATCH_MASK)); actions.add(new ActionRegLoad(NxmNxReg4.class, 0, 31, 0)); actions.add(new ActionNxResubmit(NwConstants.ELAN_SMAC_LEARNED_TABLE)); actions.add(new ActionNxResubmit(NwConstants.ELAN_SMAC_TABLE)); List instructions = new ArrayList<>(); instructions.add(new InstructionApplyActions(actions)); String flowid = String.valueOf(NwConstants.ELAN_BASE_TABLE) + NwConstants.FLOWID_SEPARATOR + "arp.match"; FlowEntity arpFlow = MDSALUtil.buildFlowEntity(dpId, NwConstants.ELAN_BASE_TABLE, flowid, NwConstants.DEFAULT_ARP_FLOW_PRIORITY, "ARP learn match flow", 0, 0, ElanConstants.COOKIE_ELAN_BASE_SMAC, matches, instructions); mdsalManager.addFlowToTx(arpFlow, writeFlowTx); } }