Examples with Of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.of.object.Of used on opensource projects

Example 26 with Of

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.of.object.Of in project netvirt by opendaylight.

the class VpnFloatingIpHandler method makeTunnelTableEntry.

private void makeTunnelTableEntry(String vpnName, BigInteger dpnId, long serviceId, List<Instruction> customInstructions, WriteTransaction writeFlowInvTx, ProviderTypes provType) {
    List<MatchInfo> mkMatches = new ArrayList<>();
    LOG.info("makeTunnelTableEntry on DpnId = {} and serviceId = {}", dpnId, serviceId);
    int flowPriority = 5;
    // then handled back to using using flow 25->44(which will be installed as part of SNAT)
    if (NatUtil.isOpenStackVniSemanticsEnforcedForGreAndVxlan(elanService, provType)) {
        mkMatches.add(new MatchTunnelId(NatOverVxlanUtil.getInternetVpnVni(idManager, vpnName, serviceId)));
        flowPriority = 6;
    } else {
        mkMatches.add(new MatchTunnelId(BigInteger.valueOf(serviceId)));
    }
    Flow terminatingServiceTableFlowEntity = MDSALUtil.buildFlowNew(NwConstants.INTERNAL_TUNNEL_TABLE, getFlowRef(dpnId, NwConstants.INTERNAL_TUNNEL_TABLE, serviceId, ""), flowPriority, String.format("%s:%d", "TST Flow Entry ", serviceId), 0, 0, COOKIE_TUNNEL.add(BigInteger.valueOf(serviceId)), mkMatches, customInstructions);
    mdsalManager.addFlowToTx(dpnId, terminatingServiceTableFlowEntity, writeFlowInvTx);
}

Example 27 with Of

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.of.object.Of 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 28 with Of

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.of.object.Of in project netvirt by opendaylight.

the class NaptManager method checkIpMap.

protected String checkIpMap(long segmentId, String internalIp) {
    LOG.debug("checkIpMap : called with segmentId {} and internalIp {}", segmentId, internalIp);
    String externalIp;
    // check if ip-map node is there
    InstanceIdentifierBuilder<IpMapping> idBuilder = InstanceIdentifier.builder(IntextIpMap.class).child(IpMapping.class, new IpMappingKey(segmentId));
    InstanceIdentifier<IpMapping> id = idBuilder.build();
    Optional<IpMapping> ipMapping = MDSALUtil.read(dataBroker, LogicalDatastoreType.OPERATIONAL, id);
    if (ipMapping.isPresent()) {
        List<IpMap> ipMaps = ipMapping.get().getIpMap();
        for (IpMap ipMap : ipMaps) {
            if (ipMap.getInternalIp().equals(internalIp)) {
                LOG.debug("checkIpMap : IpMap : {}", ipMap);
                externalIp = ipMap.getExternalIp();
                LOG.debug("checkIpMap : successfully returning externalIp {}", externalIp);
                return externalIp;
            } else if (ipMap.getInternalIp().contains("/")) {
                // subnet case
                SubnetUtils subnetUtils = new SubnetUtils(ipMap.getInternalIp());
                SubnetInfo subnetInfo = subnetUtils.getInfo();
                if (subnetInfo.isInRange(internalIp)) {
                    LOG.debug("checkIpMap : internalIp {} found to be IpMap of internalIpSubnet {}", internalIp, ipMap.getInternalIp());
                    externalIp = ipMap.getExternalIp();
                    LOG.debug("checkIpMap : checkIpMap successfully returning externalIp {}", externalIp);
                    return externalIp;
                }
            }
        }
    }
    // return null if not found
    LOG.error("checkIpMap : failed, returning NULL for segmentId {} and internalIp {}", segmentId, internalIp);
    return null;
}

Example 29 with Of

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.of.object.Of in project netvirt by opendaylight.

the class NaptSwitchHA method bestEffortDeletion.

protected void bestEffortDeletion(long routerId, String routerName, Map<String, Long> externalIpLabel, WriteTransaction removeFlowInvTx) {
    Collection<String> newExternalIps = NatUtil.getExternalIpsForRouter(dataBroker, routerId);
    if (externalIpsCache != null) {
        Set<String> removedExternalIps = new HashSet<>(externalIpsCache);
        removedExternalIps.removeAll(newExternalIps);
        if (removedExternalIps.isEmpty()) {
            LOG.info("bestEffortDeletion : No external Ip needed to be removed in bestEffortDeletion " + "method for router {}", routerName);
            return;
        }
        Uuid networkId = NatUtil.getNetworkIdFromRouterName(dataBroker, routerName);
        String vpnName = getExtNetworkVpnName(routerName, networkId);
        if (vpnName == null) {
            LOG.error("bestEffortDeletion : Vpn is not associated to externalN/w of router {}", routerName);
            return;
        }
        BigInteger naptSwitch = NatUtil.getPrimaryNaptfromRouterName(dataBroker, routerName);
        if (naptSwitch == null || naptSwitch.equals(BigInteger.ZERO)) {
            LOG.error("bestEffortDeletion : No naptSwitch is selected for router {}", routerName);
            return;
        }
        ProviderTypes extNwProvType = NatEvpnUtil.getExtNwProvTypeFromRouterName(dataBroker, routerName, networkId);
        if (extNwProvType == null) {
            return;
        }
        String gwMacAddress = NatUtil.getExtGwMacAddFromRouterName(dataBroker, routerName);
        if (gwMacAddress != null) {
            LOG.debug("bestEffortDeletion : External Gateway MAC address {} found for External Router ID {}", gwMacAddress, routerId);
        } else {
            LOG.error("bestEffortDeletion : No External Gateway MAC address found for External Router ID {}", routerId);
            return;
        }
        if (extNwProvType == ProviderTypes.VXLAN) {
            for (String externalIp : removedExternalIps) {
                externalRouterListener.clearBgpRoutes(externalIp, vpnName);
                externalRouterListener.delFibTsAndReverseTraffic(naptSwitch, routerId, externalIp, vpnName, networkId, NatConstants.DEFAULT_LABEL_VALUE, gwMacAddress, true, removeFlowInvTx);
                LOG.debug("bestEffortDeletion : Successfully removed fib entry for externalIp {} for routerId {} " + "on NAPT switch {} ", externalIp, routerId, naptSwitch);
            }
        } else {
            if (externalIpLabel == null || externalIpLabel.isEmpty()) {
                LOG.error("bestEffortDeletion : ExternalIpLabel map is empty for router {}", routerName);
                return;
            }
            Long label;
            for (String externalIp : removedExternalIps) {
                if (externalIpLabel.containsKey(externalIp)) {
                    label = externalIpLabel.get(externalIp);
                    LOG.debug("bestEffortDeletion : Label {} for ExternalIp {} for router {}", label, externalIp, routerName);
                } else {
                    LOG.debug("bestEffortDeletion : Label for ExternalIp {} is not found for router {}", externalIp, routerName);
                    continue;
                }
                externalRouterListener.clearBgpRoutes(externalIp, vpnName);
                externalRouterListener.delFibTsAndReverseTraffic(naptSwitch, routerId, externalIp, vpnName, networkId, label, gwMacAddress, true, removeFlowInvTx);
                LOG.debug("bestEffortDeletion : Successfully removed fib entries in switch {} for router {} " + "and externalIps {}", naptSwitch, routerId, externalIp);
            }
        }
    } else {
        LOG.debug("bestEffortDeletion : No external IP found for router {}", routerId);
    }
}

Example 30 with Of

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.of.object.Of 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);
        }
    }
}