Examples with Mapping org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mappingservice.rev150906.db.instance.Mapping used on opensource projects

Example 11 with Mapping

use of org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mappingservice.rev150906.db.instance.Mapping in project netvirt by opendaylight.

the class VpnFloatingIpHandler method onAddFloatingIp.

@Override
public void onAddFloatingIp(final BigInteger dpnId, final String routerUuid, final long routerId, final Uuid networkId, final String interfaceName, final InternalToExternalPortMap mapping, WriteTransaction writeFlowInvTx) {
    String externalIp = mapping.getExternalIp();
    String internalIp = mapping.getInternalIp();
    Uuid floatingIpId = mapping.getExternalId();
    Uuid subnetId = NatUtil.getFloatingIpPortSubnetIdFromFloatingIpId(dataBroker, floatingIpId);
    String floatingIpPortMacAddress = NatUtil.getFloatingIpPortMacFromFloatingIpId(dataBroker, floatingIpId);
    if (floatingIpPortMacAddress == null) {
        LOG.error("onAddFloatingIp: Unable to retrieve floatingIp port MAC address from floatingIpId {} for " + "router {} to handle floatingIp {}", floatingIpId, routerUuid, externalIp);
        return;
    }
    Optional<Subnets> externalSubnet = NatUtil.getOptionalExternalSubnets(dataBroker, subnetId);
    final String vpnName = externalSubnet.isPresent() ? subnetId.getValue() : NatUtil.getAssociatedVPN(dataBroker, networkId);
    final String subnetVpnName = externalSubnet.isPresent() ? subnetId.getValue() : null;
    if (vpnName == null) {
        LOG.error("onAddFloatingIp: No VPN is associated with ext nw {} to handle add floating ip {} configuration " + "for router {}", networkId, externalIp, routerId);
        return;
    }
    String rd = NatUtil.getVpnRd(dataBroker, vpnName);
    if (rd == null) {
        LOG.error("onAddFloatingIp: Unable to retrieve external (internet) VPN RD from external VPN {} for " + "router {} to handle floatingIp {}", vpnName, routerId, externalIp);
        return;
    }
    ProviderTypes provType = NatEvpnUtil.getExtNwProvTypeFromRouterName(dataBroker, routerUuid, networkId);
    if (provType == null) {
        return;
    }
    /*
         *  For external network of type GRE, it is required to use "Internet VPN VNI" for intra-DC
         *  communication, but we still require "MPLS labels" to reach SNAT/DNAT VMs from external
         *  entities via MPLSOverGRE.
         *
         *  MPLSOverGRE based external networks, the ``opendaylight-vni-ranges`` pool will be
         *  used to carve out a unique VNI per Internet VPN (GRE-provider-type) to be used in the
         *  datapath for traffic forwarding for ``SNAT-to-DNAT`` and ``DNAT-to-DNAT`` cases within the
         *  DataCenter.
        */
    if (NatUtil.isOpenStackVniSemanticsEnforcedForGreAndVxlan(elanService, provType)) {
        NatOverVxlanUtil.validateAndCreateVxlanVniPool(dataBroker, nvpnManager, idManager, NatConstants.ODL_VNI_POOL_NAME);
    }
    String nextHopIp = NatUtil.getEndpointIpAddressForDPN(dataBroker, dpnId);
    LOG.debug("onAddFloatingIp: Nexthop ip for prefix {} is {}", externalIp, nextHopIp);
    if (provType == ProviderTypes.VXLAN) {
        Uuid floatingIpInterface = NatEvpnUtil.getFloatingIpInterfaceIdFromFloatingIpId(dataBroker, floatingIpId);
        evpnDnatFlowProgrammer.onAddFloatingIp(dpnId, routerUuid, routerId, vpnName, internalIp, externalIp, networkId, interfaceName, floatingIpInterface.getValue(), floatingIpPortMacAddress, rd, nextHopIp, writeFlowInvTx);
        return;
    }
    /*
         *  MPLS label will be used to advertise prefixes and in "L3_LFIB_TABLE" (table 20) taking the packet
         *  to "INBOUND_NAPT_TABLE" (table 44) and "PDNAT_TABLE" (table 25).
         */
    GenerateVpnLabelInput labelInput = new GenerateVpnLabelInputBuilder().setVpnName(vpnName).setIpPrefix(externalIp).build();
    Future<RpcResult<GenerateVpnLabelOutput>> labelFuture = vpnService.generateVpnLabel(labelInput);
    ListenableFuture<RpcResult<Void>> future = Futures.transformAsync(JdkFutureAdapters.listenInPoolThread(labelFuture), (AsyncFunction<RpcResult<GenerateVpnLabelOutput>, RpcResult<Void>>) result -> {
        if (result.isSuccessful()) {
            GenerateVpnLabelOutput output = result.getResult();
            long label = output.getLabel();
            LOG.debug("onAddFloatingIp : Generated label {} for prefix {}", label, externalIp);
            FloatingIPListener.updateOperationalDS(dataBroker, routerUuid, interfaceName, label, internalIp, externalIp);
            long l3vni = 0;
            if (NatUtil.isOpenStackVniSemanticsEnforcedForGreAndVxlan(elanService, provType)) {
                l3vni = NatOverVxlanUtil.getInternetVpnVni(idManager, vpnName, l3vni).longValue();
            }
            String fibExternalIp = NatUtil.validateAndAddNetworkMask(externalIp);
            NatUtil.addPrefixToBGP(dataBroker, bgpManager, fibManager, vpnName, rd, subnetId, fibExternalIp, nextHopIp, networkId.getValue(), floatingIpPortMacAddress, label, l3vni, RouteOrigin.STATIC, dpnId);
            List<Instruction> instructions = new ArrayList<>();
            List<ActionInfo> actionsInfos = new ArrayList<>();
            actionsInfos.add(new ActionNxResubmit(NwConstants.PDNAT_TABLE));
            instructions.add(new InstructionApplyActions(actionsInfos).buildInstruction(0));
            makeTunnelTableEntry(vpnName, dpnId, label, instructions, writeFlowInvTx, provType);
            List<ActionInfo> actionInfoFib = new ArrayList<>();
            List<Instruction> customInstructions = new ArrayList<>();
            actionInfoFib.add(new ActionSetFieldEthernetDestination(new MacAddress(floatingIpPortMacAddress)));
            customInstructions.add(new InstructionApplyActions(actionInfoFib).buildInstruction(0));
            customInstructions.add(new InstructionGotoTable(NwConstants.PDNAT_TABLE).buildInstruction(1));
            makeLFibTableEntry(dpnId, label, floatingIpPortMacAddress, NwConstants.PDNAT_TABLE, writeFlowInvTx);
            CreateFibEntryInput input = new CreateFibEntryInputBuilder().setVpnName(vpnName).setSourceDpid(dpnId).setInstruction(customInstructions).setIpAddress(fibExternalIp).setServiceId(label).setIpAddressSource(CreateFibEntryInput.IpAddressSource.FloatingIP).setInstruction(customInstructions).build();
            Future<RpcResult<Void>> future1 = fibService.createFibEntry(input);
            LOG.debug("onAddFloatingIp : Add Floating Ip {} , found associated to fixed port {}", externalIp, interfaceName);
            String networkVpnName = NatUtil.getAssociatedVPN(dataBroker, networkId);
            txRunner.callWithNewWriteOnlyTransactionAndSubmit(tx -> {
                vpnManager.addSubnetMacIntoVpnInstance(networkVpnName, subnetVpnName, floatingIpPortMacAddress, dpnId, tx);
                vpnManager.addArpResponderFlowsToExternalNetworkIps(routerUuid, Collections.singleton(externalIp), floatingIpPortMacAddress, dpnId, networkId, tx);
            });
            return JdkFutureAdapters.listenInPoolThread(future1);
        } else {
            String errMsg = String.format("onAddFloatingIp : Could not retrieve the label for prefix %s " + "in VPN %s, %s", externalIp, vpnName, result.getErrors());
            LOG.error(errMsg);
            return Futures.immediateFailedFuture(new RuntimeException(errMsg));
        }
    }, MoreExecutors.directExecutor());
    Futures.addCallback(future, new FutureCallback<RpcResult<Void>>() {

        @Override
        public void onFailure(@Nonnull Throwable error) {
            LOG.error("onAddFloatingIp : Error in generate label or fib install process", error);
        }

        @Override
        public void onSuccess(@Nonnull RpcResult<Void> result) {
            if (result.isSuccessful()) {
                LOG.info("onAddFloatingIp : Successfully installed custom FIB routes for prefix {}", externalIp);
            } else {
                LOG.error("onAddFloatingIp : Error in rpc call to create custom Fib entries for prefix {} " + "in DPN {}, {}", externalIp, dpnId, result.getErrors());
            }
        }
    }, MoreExecutors.directExecutor());
    // Handle GARP transmission
    final IpAddress extrenalAddress = IpAddressBuilder.getDefaultInstance(externalIp);
    sendGarpOnInterface(dpnId, networkId, extrenalAddress, floatingIpPortMacAddress);
}

Example 12 with Mapping

use of org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mappingservice.rev150906.db.instance.Mapping in project netvirt by opendaylight.

the class VpnFloatingIpHandler method removeFromFloatingIpPortInfo.

// TODO Clean up the exception handling
@SuppressWarnings("checkstyle:IllegalCatch")
private void removeFromFloatingIpPortInfo(Uuid floatingIpId) {
    InstanceIdentifier id = buildfloatingIpIdToPortMappingIdentifier(floatingIpId);
    try {
        Optional<FloatingIpIdToPortMapping> optFloatingIpIdToPortMapping = SingleTransactionDataBroker.syncReadOptionalAndTreatReadFailedExceptionAsAbsentOptional(dataBroker, LogicalDatastoreType.CONFIGURATION, id);
        if (optFloatingIpIdToPortMapping.isPresent() && optFloatingIpIdToPortMapping.get().isFloatingIpDeleted()) {
            LOG.debug("Deleting floating IP UUID {} to Floating IP neutron port mapping from Floating " + "IP Port Info Config DS", floatingIpId.getValue());
            MDSALUtil.syncDelete(dataBroker, LogicalDatastoreType.CONFIGURATION, id);
        }
    } catch (Exception e) {
        LOG.error("removeFromFloatingIpPortInfo : Deleting floating IP UUID {} to Floating IP neutron port " + "mapping from Floating IP Port Info Config DS failed", floatingIpId.getValue(), e);
    }
}

Example 13 with Mapping

use of org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mappingservice.rev150906.db.instance.Mapping in project netvirt by opendaylight.

the class NatRpcServiceImpl method constructNatInformation.

private List<RouterNat> constructNatInformation(Uuid routerUuid, long routerId) {
    String neutronRouterName = NatUtil.getNeutronRouterNamebyUuid(dataBroker, routerUuid);
    RouterNatBuilder natRouterBuilder = new RouterNatBuilder();
    natRouterBuilder.setRouterUuid(routerUuid);
    natRouterBuilder.setRouterName(neutronRouterName);
    IpPortMapping ipPortMapping = NatUtil.getIportMapping(dataBroker, routerId);
    if (ipPortMapping == null) {
        LOG.warn("constructNatInformation : No SNAT IP Mapping found for router-uuid {}", routerUuid.getValue());
    } else {
        // Capturing SNAT information
        List<SnatIpMapping> snatIpMapping = new ArrayList<SnatIpMapping>();
        for (IntextIpProtocolType protocolType : ipPortMapping.getIntextIpProtocolType()) {
            for (IpPortMap ipPortMap : protocolType.getIpPortMap()) {
                String[] internalPortMap = ipPortMap.getIpPortInternal().split(NwConstants.MACADDR_SEP);
                SnatIpMappingBuilder natIpMappingBuilder = new SnatIpMappingBuilder().setInternalIp(internalPortMap[0]).setInternalPort(internalPortMap[1]).setExternalIp(ipPortMap.getIpPortExternal().getIpAddress()).setExternalPort(ipPortMap.getIpPortExternal().getPortNum().toString()).setProtocol(protocolType.getProtocol().getName());
                snatIpMapping.add(natIpMappingBuilder.build());
            }
        }
        natRouterBuilder.setSnatIpMapping(snatIpMapping);
    }
    // Capturing DNAT information
    List<DnatIpMapping> dnatIpMapping = new ArrayList<DnatIpMapping>();
    List<Ports> fipPorts = NatUtil.getFloatingIpPortsForRouter(dataBroker, routerUuid);
    if (fipPorts.isEmpty()) {
        LOG.warn("constructNatInformation : No DNAT IP Mapping found for router-uuid {}", routerUuid.getValue());
    } else {
        for (Ports fipPort : fipPorts) {
            List<InternalToExternalPortMap> ipMapping = fipPort.getInternalToExternalPortMap();
            for (InternalToExternalPortMap fipMap : ipMapping) {
                DnatIpMappingBuilder natIpMappingBuilder = new DnatIpMappingBuilder().setExternalIp(fipMap.getExternalIp()).setInternalIp(fipMap.getInternalIp());
                dnatIpMapping.add(natIpMappingBuilder.build());
            }
        }
        natRouterBuilder.setDnatIpMapping(dnatIpMapping);
    }
    List<RouterNat> natRouterList = new ArrayList<RouterNat>();
    natRouterList.add(natRouterBuilder.build());
    return natRouterList;
}

Example 14 with Mapping

use of org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mappingservice.rev150906.db.instance.Mapping in project netvirt by opendaylight.

the class NaptManager method getExternalAddressMapping.

/**
 * method to get external ip/port mapping when provided with internal ip/port pair
 * If already a mapping exist for the given input, then the existing mapping is returned
 * instead of overwriting with new ip/port pair.
 *
 * @param segmentId     - Router ID
 * @param sourceAddress - internal ip address/port pair
 * @param protocol      - TCP/UDP
 * @return external ip address/port
 */
// TODO Clean up the exception handling
@SuppressWarnings("checkstyle:IllegalCatch")
public SessionAddress getExternalAddressMapping(long segmentId, SessionAddress sourceAddress, NAPTEntryEvent.Protocol protocol) {
    LOG.debug("getExternalAddressMapping : called with segmentId {}, internalIp {} and port {}", segmentId, sourceAddress.getIpAddress(), sourceAddress.getPortNumber());
    /*
         1. Get Internal IP, Port in IP:Port format
         2. Inside DB with routerId get the list of entries and check if it matches with existing IP:Port
         3. If True return SessionAddress of ExternalIp and Port
         4. Else check ip Map and Form the ExternalIp and Port and update DB and then return ExternalIp and Port
         */
    // SessionAddress externalIpPort = new SessionAddress();
    String internalIpPort = sourceAddress.getIpAddress() + ":" + sourceAddress.getPortNumber();
    // First check existing Port Map.
    SessionAddress existingIpPort = checkIpPortMap(segmentId, internalIpPort, protocol);
    if (existingIpPort != null) {
        // populate externalIpPort from IpPortMap and return
        LOG.debug("getExternalAddressMapping : successfully returning existingIpPort as {} and {}", existingIpPort.getIpAddress(), existingIpPort.getPortNumber());
        return existingIpPort;
    } else {
        // Now check in ip-map
        String externalIp = checkIpMap(segmentId, sourceAddress.getIpAddress());
        if (externalIp == null) {
            LOG.error("getExternalAddressMapping : Unexpected error, internal to external " + "ip map does not exist");
            return null;
        } else {
            /* Logic assuming internalIp is always ip and not subnet
                  * case 1: externalIp is ip
                  *        a) goto externalIp pool and getPort and return
                  *        b) else return error
                  * case 2: externalIp is subnet
                  *        a) Take first externalIp and goto that Pool and getPort
                  *             if port -> return
                  *             else Take second externalIp and create that Pool and getPort
                  *             if port ->return
                  *             else
                  *             Continue same with third externalIp till we exhaust subnet
                  *        b) Nothing worked return error
                  */
            SubnetUtils externalIpSubnet;
            List<String> allIps = new ArrayList<>();
            String subnetPrefix = "/" + String.valueOf(NatConstants.DEFAULT_PREFIX);
            boolean extSubnetFlag = false;
            if (!externalIp.contains(subnetPrefix)) {
                extSubnetFlag = true;
                externalIpSubnet = new SubnetUtils(externalIp);
                allIps = Arrays.asList(externalIpSubnet.getInfo().getAllAddresses());
                LOG.debug("getExternalAddressMapping : total count of externalIps available {}", externalIpSubnet.getInfo().getAddressCount());
            } else {
                LOG.debug("getExternalAddressMapping : getExternalAddress single ip case");
                if (externalIp.contains(subnetPrefix)) {
                    // remove /32 what we got from checkIpMap
                    externalIp = externalIp.substring(0, externalIp.indexOf(subnetPrefix));
                }
                allIps.add(externalIp);
            }
            boolean nextExtIpFlag = false;
            for (String extIp : allIps) {
                LOG.info("getExternalAddressMapping : Looping externalIPs with externalIP now as {}", extIp);
                if (nextExtIpFlag) {
                    createNaptPortPool(extIp);
                    LOG.debug("getExternalAddressMapping : Created Pool for next Ext IP {}", extIp);
                }
                AllocateIdInput getIdInput = new AllocateIdInputBuilder().setPoolName(extIp).setIdKey(internalIpPort).build();
                try {
                    Future<RpcResult<AllocateIdOutput>> result = idManager.allocateId(getIdInput);
                    RpcResult<AllocateIdOutput> rpcResult;
                    if (result != null && result.get().isSuccessful()) {
                        LOG.debug("getExternalAddressMapping : Got id from idManager");
                        rpcResult = result.get();
                    } else {
                        LOG.error("getExternalAddressMapping : getExternalAddressMapping, idManager could not " + "allocate id retry if subnet");
                        if (!extSubnetFlag) {
                            LOG.error("getExternalAddressMapping : getExternalAddressMapping returning null " + "for single IP case, may be ports exhausted");
                            return null;
                        }
                        LOG.debug("getExternalAddressMapping : Could be ports exhausted case, " + "try with another externalIP if possible");
                        nextExtIpFlag = true;
                        continue;
                    }
                    int extPort = rpcResult.getResult().getIdValue().intValue();
                    // Write to ip-port-map before returning
                    IpPortExternalBuilder ipExt = new IpPortExternalBuilder();
                    IpPortExternal ipPortExt = ipExt.setIpAddress(extIp).setPortNum(extPort).build();
                    IpPortMap ipm = new IpPortMapBuilder().setKey(new IpPortMapKey(internalIpPort)).setIpPortInternal(internalIpPort).setIpPortExternal(ipPortExt).build();
                    LOG.debug("getExternalAddressMapping : writing into ip-port-map with " + "externalIP {} and port {}", ipPortExt.getIpAddress(), ipPortExt.getPortNum());
                    try {
                        MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.CONFIGURATION, getIpPortMapIdentifier(segmentId, internalIpPort, protocol), ipm);
                    } catch (UncheckedExecutionException uee) {
                        LOG.error("getExternalAddressMapping : Failed to write into ip-port-map with exception", uee);
                    }
                    // Write to snat-internal-ip-port-info
                    String internalIpAddress = sourceAddress.getIpAddress();
                    int ipPort = sourceAddress.getPortNumber();
                    ProtocolTypes protocolType = NatUtil.getProtocolType(protocol);
                    List<Integer> portList = new ArrayList<>(NatUtil.getInternalIpPortListInfo(dataBroker, segmentId, internalIpAddress, protocolType));
                    portList.add(ipPort);
                    IntIpProtoTypeBuilder builder = new IntIpProtoTypeBuilder();
                    IntIpProtoType intIpProtocolType = builder.setKey(new IntIpProtoTypeKey(protocolType)).setPorts(portList).build();
                    try {
                        MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.CONFIGURATION, NatUtil.buildSnatIntIpPortIdentifier(segmentId, internalIpAddress, protocolType), intIpProtocolType);
                    } catch (Exception ex) {
                        LOG.error("getExternalAddressMapping : Failed to write into snat-internal-ip-port-info " + "with exception", ex);
                    }
                    SessionAddress externalIpPort = new SessionAddress(extIp, extPort);
                    LOG.debug("getExternalAddressMapping : successfully returning externalIP {} " + "and port {}", externalIpPort.getIpAddress(), externalIpPort.getPortNumber());
                    return externalIpPort;
                } catch (InterruptedException | ExecutionException e) {
                    LOG.error("getExternalAddressMapping : Exception caught", e);
                    return null;
                }
            }
        // end of for loop
        }
    // end of else ipmap present
    }
    // end of else check ipmap
    LOG.error("getExternalAddressMapping : Unable to handle external IP address and port mapping with segmentId {}," + "internalIp {} and internalPort {}", segmentId, sourceAddress.getIpAddress(), sourceAddress.getPortNumber());
    return null;
}

Example 15 with Mapping

use of org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.mappingservice.rev150906.db.instance.Mapping in project netvirt by opendaylight.

the class NaptSwitchHA method removeSnatFlowsInOldNaptSwitch.

/* This method checks the switch that gone down is a NaptSwitch for a router.
       If it is a NaptSwitch
          1) selects new NAPT switch
          2) installs nat flows in new NAPT switch
          table 21(FIB)->26(PSNAT)->group(resubmit/napttunnel)->36(Terminating)->46(outbound)->47(resubmit)->21
          3) modify the group and miss entry flow in other vSwitches pointing to newNaptSwitch
          4) Remove nat flows in oldNaptSwitch
     */
/*public void handleNaptSwitchDown(BigInteger dpnId){

        LOG.debug("handleNaptSwitchDown method is called with dpnId {}",dpnId);
        BigInteger naptSwitch;
        try {
            NaptSwitches naptSwitches = NatUtil.getNaptSwitch(dataBroker);
            if (naptSwitches == null || naptSwitches.getRouterToNaptSwitch() == null
             || naptSwitches.getRouterToNaptSwitch().isEmpty()) {
                LOG.debug("NaptSwitchDown: NaptSwitch is not allocated for none of the routers");
                return;
            }
            for (RouterToNaptSwitch routerToNaptSwitch : naptSwitches.getRouterToNaptSwitch()) {
                String routerName = routerToNaptSwitch.getRouterName();
                naptSwitch = routerToNaptSwitch.getPrimarySwitchId();
                boolean naptStatus = isNaptSwitchDown(routerName,dpnId,naptSwitch);
                if (!naptStatus) {
                    LOG.debug("NaptSwitchDown: Switch with DpnId {} is not naptSwitch for router {}",
                            dpnId, routerName);
                } else {
                    removeSnatFlowsInOldNaptSwitch(routerName,naptSwitch);
                    return;
                }
            }
        } catch (Exception ex) {
            LOG.error("Exception in handleNaptSwitchDown method {}",ex);
        }
    }*/
protected void removeSnatFlowsInOldNaptSwitch(String routerName, Long routerId, BigInteger naptSwitch, Map<String, Long> externalIpmap, WriteTransaction removeFlowInvTx) {
    // remove SNAT flows in old NAPT SWITCH
    Uuid networkId = NatUtil.getNetworkIdFromRouterName(dataBroker, routerName);
    String vpnName = getExtNetworkVpnName(routerName, networkId);
    if (vpnName == null) {
        LOG.error("removeSnatFlowsInOldNaptSwitch : Vpn is not associated to externalN/w of router {}", routerName);
        return;
    }
    ProviderTypes extNwProvType = NatEvpnUtil.getExtNwProvTypeFromRouterName(dataBroker, routerName, networkId);
    if (extNwProvType == null) {
        LOG.error("removeSnatFlowsInOldNaptSwitch : Unable to retrieve the External Network Provider Type " + "for Router {}", routerName);
        return;
    }
    if (extNwProvType == ProviderTypes.VXLAN) {
        evpnNaptSwitchHA.evpnRemoveSnatFlowsInOldNaptSwitch(routerName, routerId, vpnName, naptSwitch, removeFlowInvTx);
    } else {
        // Remove the Terminating Service table entry which forwards the packet to Outbound NAPT Table
        long tunnelId = NatUtil.getTunnelIdForNonNaptToNaptFlow(dataBroker, elanManager, idManager, routerId, routerName);
        String tsFlowRef = externalRouterListener.getFlowRefTs(naptSwitch, NwConstants.INTERNAL_TUNNEL_TABLE, tunnelId);
        FlowEntity tsNatFlowEntity = NatUtil.buildFlowEntity(naptSwitch, NwConstants.INTERNAL_TUNNEL_TABLE, tsFlowRef);
        LOG.info("removeSnatFlowsInOldNaptSwitch : Remove the flow in table {} for the old napt switch " + "with the DPN ID {} and router ID {}", NwConstants.INTERNAL_TUNNEL_TABLE, naptSwitch, routerId);
        mdsalManager.removeFlowToTx(tsNatFlowEntity, removeFlowInvTx);
    }
    if (NatUtil.isOpenStackVniSemanticsEnforcedForGreAndVxlan(elanManager, extNwProvType)) {
        // Remove the flow table 25->44 If there is no FIP Match on table 25 (PDNAT_TABLE)
        NatUtil.removePreDnatToSnatTableEntry(mdsalManager, naptSwitch, removeFlowInvTx);
    }
    // Remove the Outbound flow entry which forwards the packet to Outbound NAPT Table
    String outboundNatFlowRef = externalRouterListener.getFlowRefOutbound(naptSwitch, NwConstants.OUTBOUND_NAPT_TABLE, routerId);
    FlowEntity outboundNatFlowEntity = NatUtil.buildFlowEntity(naptSwitch, NwConstants.OUTBOUND_NAPT_TABLE, outboundNatFlowRef);
    LOG.info("Remove the flow in table {} for the old napt switch with the DPN ID {} and router ID {}", NwConstants.OUTBOUND_NAPT_TABLE, naptSwitch, routerId);
    mdsalManager.removeFlowToTx(outboundNatFlowEntity, removeFlowInvTx);
    // Remove the NAPT PFIB TABLE (47->21) which forwards the incoming packet to FIB Table matching on the
    // External Subnet Vpn Id.
    Collection<Uuid> externalSubnetIdsForRouter = NatUtil.getExternalSubnetIdsForRouter(dataBroker, routerName);
    for (Uuid externalSubnetId : externalSubnetIdsForRouter) {
        long subnetVpnId = NatUtil.getVpnId(dataBroker, externalSubnetId.getValue());
        if (subnetVpnId != -1) {
            String natPfibSubnetFlowRef = externalRouterListener.getFlowRefTs(naptSwitch, NwConstants.NAPT_PFIB_TABLE, subnetVpnId);
            FlowEntity natPfibFlowEntity = NatUtil.buildFlowEntity(naptSwitch, NwConstants.NAPT_PFIB_TABLE, natPfibSubnetFlowRef);
            mdsalManager.removeFlowToTx(natPfibFlowEntity, removeFlowInvTx);
            LOG.debug("removeSnatFlowsInOldNaptSwitch : Removed the flow in table {} with external subnet " + "Vpn Id {} as metadata on Napt Switch {}", NwConstants.NAPT_PFIB_TABLE, subnetVpnId, naptSwitch);
        }
    }
    // Remove the NAPT_PFIB_TABLE(47) flow entry forwards the packet to Fib Table for inbound traffic
    // matching on the router ID.
    String naptPFibflowRef = externalRouterListener.getFlowRefTs(naptSwitch, NwConstants.NAPT_PFIB_TABLE, routerId);
    FlowEntity naptPFibFlowEntity = NatUtil.buildFlowEntity(naptSwitch, NwConstants.NAPT_PFIB_TABLE, naptPFibflowRef);
    LOG.info("removeSnatFlowsInOldNaptSwitch : Remove the flow in table {} for the old napt switch " + "with the DPN ID {} and router ID {}", NwConstants.NAPT_PFIB_TABLE, naptSwitch, routerId);
    mdsalManager.removeFlowToTx(naptPFibFlowEntity, removeFlowInvTx);
    // Remove the NAPT_PFIB_TABLE(47) flow entry forwards the packet to Fib Table for outbound traffic
    // matching on the vpn ID.
    boolean switchSharedByRouters = false;
    Uuid extNetworkId = NatUtil.getNetworkIdFromRouterName(dataBroker, routerName);
    if (extNetworkId != null) {
        List<String> routerNamesAssociated = getRouterIdsForExtNetwork(extNetworkId);
        for (String routerNameAssociated : routerNamesAssociated) {
            if (!routerNameAssociated.equals(routerName)) {
                Long routerIdAssociated = NatUtil.getVpnId(dataBroker, routerNameAssociated);
                BigInteger naptDpn = NatUtil.getPrimaryNaptfromRouterName(dataBroker, routerNameAssociated);
                if (naptDpn != null && naptDpn.equals(naptSwitch)) {
                    LOG.debug("removeSnatFlowsInOldNaptSwitch : Napt switch {} is also acting as primary " + "for router {}", naptSwitch, routerIdAssociated);
                    switchSharedByRouters = true;
                    break;
                }
            }
        }
        if (!switchSharedByRouters) {
            Long vpnId = getVpnIdForRouter(routerId, extNetworkId);
            if (vpnId != NatConstants.INVALID_ID) {
                String naptFibflowRef = externalRouterListener.getFlowRefTs(naptSwitch, NwConstants.NAPT_PFIB_TABLE, vpnId);
                FlowEntity naptFibFlowEntity = NatUtil.buildFlowEntity(naptSwitch, NwConstants.NAPT_PFIB_TABLE, naptFibflowRef);
                LOG.info("removeSnatFlowsInOldNaptSwitch : Remove the flow in table {} for the old napt switch" + " with the DPN ID {} and vpnId {}", NwConstants.NAPT_PFIB_TABLE, naptSwitch, vpnId);
                mdsalManager.removeFlowToTx(naptFibFlowEntity, removeFlowInvTx);
            } else {
                LOG.error("removeSnatFlowsInOldNaptSwitch : Invalid vpnId retrieved for routerId {}", routerId);
                return;
            }
        }
    }
    // Remove Fib entries,tables 20->44 ,36-> 44
    String gwMacAddress = NatUtil.getExtGwMacAddFromRouterName(dataBroker, routerName);
    if (externalIpmap != null && !externalIpmap.isEmpty()) {
        for (Entry<String, Long> entry : externalIpmap.entrySet()) {
            String externalIp = entry.getKey();
            Long label = entry.getValue();
            externalRouterListener.delFibTsAndReverseTraffic(naptSwitch, routerId, externalIp, vpnName, extNetworkId, label, gwMacAddress, true, removeFlowInvTx);
            LOG.debug("removeSnatFlowsInOldNaptSwitch : Successfully removed fib entries in old naptswitch {} " + "for router {} and externalIps {} label {}", naptSwitch, routerId, externalIp, label);
        }
    } else {
        List<String> externalIps = NatUtil.getExternalIpsForRouter(dataBroker, routerName);
        if (networkId != null) {
            externalRouterListener.clearFibTsAndReverseTraffic(naptSwitch, routerId, networkId, externalIps, null, gwMacAddress, removeFlowInvTx);
            LOG.debug("removeSnatFlowsInOldNaptSwitch : Successfully removed fib entries in old naptswitch {} for " + "router {} with networkId {} and externalIps {}", naptSwitch, routerId, networkId, externalIps);
        } else {
            LOG.debug("removeSnatFlowsInOldNaptSwitch : External network not associated to router {}", routerId);
        }
        externalRouterListener.removeNaptFibExternalOutputFlows(routerId, naptSwitch, extNetworkId, externalIps, removeFlowInvTx);
    }
    // For the router ID get the internal IP , internal port and the corresponding external IP and external Port.
    IpPortMapping ipPortMapping = NatUtil.getIportMapping(dataBroker, routerId);
    if (ipPortMapping == null || ipPortMapping.getIntextIpProtocolType() == null || ipPortMapping.getIntextIpProtocolType().isEmpty()) {
        LOG.warn("removeSnatFlowsInOldNaptSwitch : No Internal Ip Port mapping associated to router {}, " + "no flows need to be removed in oldNaptSwitch {}", routerId, naptSwitch);
        return;
    }
    BigInteger cookieSnatFlow = NatUtil.getCookieNaptFlow(routerId);
    List<IntextIpProtocolType> intextIpProtocolTypes = ipPortMapping.getIntextIpProtocolType();
    for (IntextIpProtocolType intextIpProtocolType : intextIpProtocolTypes) {
        if (intextIpProtocolType.getIpPortMap() == null || intextIpProtocolType.getIpPortMap().isEmpty()) {
            LOG.debug("removeSnatFlowsInOldNaptSwitch : No {} session associated to router {}," + "no flows need to be removed in oldNaptSwitch {}", intextIpProtocolType.getProtocol(), routerId, naptSwitch);
            break;
        }
        List<IpPortMap> ipPortMaps = intextIpProtocolType.getIpPortMap();
        for (IpPortMap ipPortMap : ipPortMaps) {
            String ipPortInternal = ipPortMap.getIpPortInternal();
            String[] ipPortParts = ipPortInternal.split(":");
            if (ipPortParts.length != 2) {
                LOG.error("removeSnatFlowsInOldNaptSwitch : Unable to retrieve the Internal IP and port");
                continue;
            }
            String internalIp = ipPortParts[0];
            String internalPort = ipPortParts[1];
            // Build and remove flow in outbound NAPT table
            String switchFlowRef = NatUtil.getNaptFlowRef(naptSwitch, NwConstants.OUTBOUND_NAPT_TABLE, String.valueOf(routerId), internalIp, Integer.parseInt(internalPort));
            FlowEntity outboundNaptFlowEntity = NatUtil.buildFlowEntity(naptSwitch, NwConstants.OUTBOUND_NAPT_TABLE, cookieSnatFlow, switchFlowRef);
            LOG.info("removeSnatFlowsInOldNaptSwitch : Remove the flow in table {} for old napt switch " + "with the DPN ID {} and router ID {}", NwConstants.OUTBOUND_NAPT_TABLE, naptSwitch, routerId);
            mdsalManager.removeFlowToTx(outboundNaptFlowEntity, removeFlowInvTx);
            IpPortExternal ipPortExternal = ipPortMap.getIpPortExternal();
            if (ipPortExternal == null) {
                LOG.debug("removeSnatFlowsInOldNaptSwitch : External Ipport mapping not found for internalIp {} " + "with port {} for router {}", internalIp, internalPort, routerId);
                continue;
            }
            String externalIp = ipPortExternal.getIpAddress();
            int externalPort = ipPortExternal.getPortNum();
            // Build and remove flow in  inbound NAPT table
            switchFlowRef = NatUtil.getNaptFlowRef(naptSwitch, NwConstants.INBOUND_NAPT_TABLE, String.valueOf(routerId), externalIp, externalPort);
            FlowEntity inboundNaptFlowEntity = NatUtil.buildFlowEntity(naptSwitch, NwConstants.INBOUND_NAPT_TABLE, cookieSnatFlow, switchFlowRef);
            LOG.info("removeSnatFlowsInOldNaptSwitch : Remove the flow in table {} for old napt switch with the " + "DPN ID {} and router ID {}", NwConstants.INBOUND_NAPT_TABLE, naptSwitch, routerId);
            mdsalManager.removeFlowToTx(inboundNaptFlowEntity, removeFlowInvTx);
        }
    }
}