Examples with Interfaces org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces used on opensource projects

Example 46 with Interfaces

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces in project netvirt by opendaylight.

the class TunnelInterfaceStateListener method handleTunnelEventForDPN.

// TODO Clean up the exception handling
@SuppressWarnings("checkstyle:IllegalCatch")
private void handleTunnelEventForDPN(StateTunnelList stateTunnelList, TunnelAction tunnelAction) {
    final BigInteger srcDpnId = new BigInteger(stateTunnelList.getSrcInfo().getTepDeviceId());
    final String srcTepIp = String.valueOf(stateTunnelList.getSrcInfo().getTepIp().getValue());
    String destTepIp = String.valueOf(stateTunnelList.getDstInfo().getTepIp().getValue());
    String rd;
    BigInteger remoteDpnId = null;
    boolean isTepDeletedOnDpn = false;
    LOG.info("handleTunnelEventForDPN: Handle tunnel event for srcDpn {} SrcTepIp {} DestTepIp {} ", srcDpnId, srcTepIp, destTepIp);
    int tunTypeVal = getTunnelType(stateTunnelList);
    LOG.trace("handleTunnelEventForDPN: tunTypeVal is {}", tunTypeVal);
    try {
        if (tunnelAction == TunnelAction.TUNNEL_EP_ADD) {
            LOG.info("handleTunnelEventForDPN: Tunnel ADD event received for Dpn {} VTEP Ip {} destTepIp {}", srcDpnId, srcTepIp, destTepIp);
            if (isTunnelInLogicalGroup(stateTunnelList)) {
                return;
            }
        } else if (tunnelAction == TunnelAction.TUNNEL_EP_DELETE) {
            LOG.info("handleTunnelEventForDPN: Tunnel DELETE event received for Dpn {} VTEP Ip {} DestTepIp {}", srcDpnId, srcTepIp, destTepIp);
            // When tunnel EP is deleted on a DPN , VPN gets two deletion event.
            // One for a DPN on which tunnel EP was deleted and another for other-end DPN.
            // Update the adj for the vpninterfaces for a DPN on which TEP is deleted.
            // Update the adj & VRF for the vpninterfaces for a DPN on which TEP is deleted.
            // Dont update the adj & VRF for vpninterfaces for a DPN on which TEP is not deleted.
            String endpointIpForDPN = null;
            try {
                endpointIpForDPN = InterfaceUtils.getEndpointIpAddressForDPN(dataBroker, srcDpnId);
            } catch (Exception e) {
                LOG.error("handleTunnelEventForDPN: Unable to resolve endpoint IP for srcDpn {}", srcDpnId);
                /* this dpn does not have the VTEP */
                endpointIpForDPN = null;
            }
            if (endpointIpForDPN == null) {
                LOG.info("handleTunnelEventForDPN: Tunnel TEP is deleted on Dpn {} VTEP Ip {} destTepIp {}", srcDpnId, srcTepIp, destTepIp);
                isTepDeletedOnDpn = true;
            }
        }
        // Get the list of VpnInterfaces from Intf Mgr for a SrcDPN on which TEP is added/deleted
        Future<RpcResult<GetDpnInterfaceListOutput>> result;
        List<Interfaces> srcDpninterfacelist = new ArrayList<>();
        List<Interfaces> destDpninterfacelist = new ArrayList<>();
        try {
            result = intfRpcService.getDpnInterfaceList(new GetDpnInterfaceListInputBuilder().setDpid(srcDpnId).build());
            RpcResult<GetDpnInterfaceListOutput> rpcResult = result.get();
            if (!rpcResult.isSuccessful()) {
                LOG.error("handleTunnelEventForDPN: RPC Call to GetDpnInterfaceList for srcDpnid {} srcTepIp {}" + " destTepIP {} returned with Errors {}", srcDpnId, srcTepIp, destTepIp, rpcResult.getErrors());
            } else {
                srcDpninterfacelist = rpcResult.getResult().getInterfaces();
            }
        } catch (Exception e) {
            LOG.error("handleTunnelEventForDPN: Exception when querying for GetDpnInterfaceList for srcDpnid {}" + " srcTepIp {} destTepIp {}", srcDpnId, srcTepIp, destTepIp, e);
        }
        // Get the list of VpnInterfaces from Intf Mgr for a destDPN only for internal tunnel.
        if (tunTypeVal == VpnConstants.ITMTunnelLocType.Internal.getValue()) {
            remoteDpnId = new BigInteger(stateTunnelList.getDstInfo().getTepDeviceId());
            try {
                result = intfRpcService.getDpnInterfaceList(new GetDpnInterfaceListInputBuilder().setDpid(remoteDpnId).build());
                RpcResult<GetDpnInterfaceListOutput> rpcResult = result.get();
                if (!rpcResult.isSuccessful()) {
                    LOG.error("handleTunnelEventForDPN: RPC Call to GetDpnInterfaceList for remoteDpnid {}" + " srcTepIP {} destTepIp {} returned with Errors {}", remoteDpnId, srcTepIp, destTepIp, rpcResult.getErrors());
                } else {
                    destDpninterfacelist = rpcResult.getResult().getInterfaces();
                }
            } catch (Exception e) {
                LOG.error("handleTunnelEventForDPN: Exception when querying for GetDpnInterfaceList" + " for remoteDpnid {} srcTepIp {} destTepIp {}", remoteDpnId, srcTepIp, destTepIp, e);
            }
        }
        /*
             * Iterate over the list of VpnInterface for a SrcDpn on which TEP is added or deleted and read the adj.
             * Update the adjacencies with the updated nexthop.
             */
        Iterator<Interfaces> interfacelistIter = srcDpninterfacelist.iterator();
        Interfaces interfaces = null;
        String intfName = null;
        List<Uuid> subnetList = new ArrayList<>();
        Map<Long, String> vpnIdRdMap = new HashMap<>();
        Set<String> listVpnName = new HashSet<>();
        while (interfacelistIter.hasNext()) {
            interfaces = interfacelistIter.next();
            if (!L2vlan.class.equals(interfaces.getInterfaceType())) {
                LOG.info("handleTunnelEventForDPN: Interface {} not of type L2Vlan", interfaces.getInterfaceName());
                return;
            }
            intfName = interfaces.getInterfaceName();
            VpnInterface vpnInterface = VpnUtil.getConfiguredVpnInterface(dataBroker, intfName);
            if (vpnInterface != null && !Boolean.TRUE.equals(vpnInterface.isScheduledForRemove())) {
                listVpnName.addAll(VpnHelper.getVpnInterfaceVpnInstanceNamesString(vpnInterface.getVpnInstanceNames()));
                handleTunnelEventForDPNVpn(stateTunnelList, vpnIdRdMap, tunnelAction, isTepDeletedOnDpn, subnetList, TunnelEventProcessingMethod.POPULATESUBNETS, vpnInterface);
            }
        }
        /*
             * Iterate over the list of VpnInterface for destDPN and get the prefix .
             * Create remote rule for each of those prefix on srcDPN.
             */
        interfacelistIter = destDpninterfacelist.iterator();
        while (interfacelistIter.hasNext()) {
            interfaces = interfacelistIter.next();
            if (!L2vlan.class.equals(interfaces.getInterfaceType())) {
                LOG.info("handleTunnelEventForDPN: Interface {} not of type L2Vlan", interfaces.getInterfaceName());
                return;
            }
            intfName = interfaces.getInterfaceName();
            VpnInterface vpnInterface = VpnUtil.getConfiguredVpnInterface(dataBroker, intfName);
            if (vpnInterface != null) {
                handleTunnelEventForDPNVpn(stateTunnelList, vpnIdRdMap, tunnelAction, isTepDeletedOnDpn, subnetList, TunnelEventProcessingMethod.MANAGEREMOTEROUTES, vpnInterface);
            }
        }
        // Iterate over the VpnId-to-Rd map.
        for (Map.Entry<Long, String> entry : vpnIdRdMap.entrySet()) {
            Long vpnId = entry.getKey();
            rd = entry.getValue();
            if (tunnelAction == TunnelAction.TUNNEL_EP_ADD && tunTypeVal == VpnConstants.ITMTunnelLocType.External.getValue()) {
                fibManager.populateExternalRoutesOnDpn(srcDpnId, vpnId, rd, srcTepIp, destTepIp);
            } else if (tunnelAction == TunnelAction.TUNNEL_EP_DELETE && tunTypeVal == VpnConstants.ITMTunnelLocType.External.getValue()) {
                fibManager.cleanUpExternalRoutesOnDpn(srcDpnId, vpnId, rd, srcTepIp, destTepIp);
            }
        }
        if (listVpnName.size() >= 1) {
            if (tunnelAction == TunnelAction.TUNNEL_EP_ADD) {
                for (Uuid subnetId : subnetList) {
                    // Populate the List of subnets
                    vpnSubnetRouteHandler.updateSubnetRouteOnTunnelUpEvent(subnetId, srcDpnId);
                }
            }
            if (tunnelAction == TunnelAction.TUNNEL_EP_DELETE && isTepDeletedOnDpn) {
                for (Uuid subnetId : subnetList) {
                    // Populate the List of subnets
                    vpnSubnetRouteHandler.updateSubnetRouteOnTunnelDownEvent(subnetId, srcDpnId);
                }
            }
        }
    } catch (RuntimeException e) {
        LOG.error("handleTunnelEventForDpn: Unable to handle the tunnel event for srcDpnId {} srcTepIp {}" + " remoteDpnId {} destTepIp {}", srcDpnId, srcTepIp, remoteDpnId, destTepIp, e);
    }
}

Example 47 with Interfaces

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces in project netvirt by opendaylight.

the class ElanDpnInterfacesListener method remove.

@Override
protected void remove(InstanceIdentifier<DpnInterfaces> identifier, final DpnInterfaces dpnInterfaces) {
    final String elanName = getElanName(identifier);
    BigInteger removeDpnId = dpnInterfaces.getDpId();
    LOG.debug("ELAN interfaces {} removed from on DPN {} for ELAN {}", dpnInterfaces.getInterfaces(), removeDpnId, elanName);
    Optional<ElanServiceChainState> elanServiceChainState = ElanServiceChainUtils.getElanServiceChainState(broker, elanName);
    if (elanServiceChainState.isPresent()) {
        List<ElanToPseudoPortData> elanToPseudoPortDataList = elanServiceChainState.get().getElanToPseudoPortData();
        for (ElanToPseudoPortData elanToPseudoPortData : elanToPseudoPortDataList) {
            Long scfTag = elanToPseudoPortData.getScfTag();
            Long elanLportTag = elanToPseudoPortData.getElanLportTag();
            if (scfTag != null && elanLportTag != null) {
                handleUpdate(removeDpnId, elanName, (short) 0, /* tableId, ignored in removals */
                elanLportTag.intValue(), /*21 bit*/
                0, /* scfTag, ignored in removals */
                NwConstants.DEL_FLOW);
            } else {
                LOG.debug("One of scfTag or lPortTag is null for ELAN={}:  scfTag={}  lportTag={}", elanName, scfTag, elanLportTag);
            }
        }
    }
}

Example 48 with Interfaces

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces in project netvirt by opendaylight.

the class NatTunnelInterfaceStateListener method hndlTepAddForDnatInEachRtr.

private void hndlTepAddForDnatInEachRtr(RoutersList router, long routerId, String nextHopIp, BigInteger tepAddedDpnId, ProviderTypes extNwProvType, WriteTransaction writeFlowInvTx) {
    // DNAT : Advertise the new route to the floating IP having the new TEP IP as the next hop IP
    final String routerName = router.getRouter();
    InstanceIdentifier<RouterPorts> routerPortsId = NatUtil.getRouterPortsId(routerName);
    Optional<RouterPorts> optRouterPorts = MDSALUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, routerPortsId);
    if (!optRouterPorts.isPresent()) {
        LOG.debug("hndlTepAddForDnatInEachRtr : DNAT -> Could not read Router Ports data object with id: {} " + "from DNAT FloatinIpInfo", routerName);
        return;
    }
    RouterPorts routerPorts = optRouterPorts.get();
    Uuid extNwId = routerPorts.getExternalNetworkId();
    final String vpnName = NatUtil.getAssociatedVPN(dataBroker, extNwId);
    if (vpnName == null) {
        LOG.info("hndlTepAddForDnatInEachRtr : DNAT -> No External VPN associated with ext nw {} for router {}", extNwId, routerName);
        return;
    }
    String rd = NatUtil.getVpnRd(dataBroker, vpnName);
    if (extNwProvType == null) {
        return;
    }
    String gwMacAddress = null;
    long l3Vni = 0;
    if (extNwProvType == ProviderTypes.VXLAN) {
        // Get the External Gateway MAC Address which is Router gateway MAC address for SNAT
        gwMacAddress = NatUtil.getExtGwMacAddFromRouterName(dataBroker, routerName);
        if (gwMacAddress != null) {
            LOG.debug("hndlTepAddForDnatInEachRtr : External GwMAC address {} found for External Router ID {}", gwMacAddress, routerId);
        } else {
            LOG.error("hndlTepAddForDnatInEachRtr : No External GwMAC address found for External Router ID {}", routerId);
            return;
        }
        // get l3Vni value for external VPN
        l3Vni = NatEvpnUtil.getL3Vni(dataBroker, rd);
        if (l3Vni == NatConstants.DEFAULT_L3VNI_VALUE) {
            LOG.debug("hndlTepAddForDnatInEachRtr : L3VNI value is not configured in Internet VPN {} and RD {} " + "Carve-out L3VNI value from OpenDaylight VXLAN VNI Pool and continue to installing " + "NAT flows", vpnName, rd);
            l3Vni = NatOverVxlanUtil.getInternetVpnVni(idManager, vpnName, routerId).longValue();
        }
    }
    List<Ports> interfaces = routerPorts.getPorts();
    for (Ports port : interfaces) {
        // Get the DPN on which this interface resides
        final String interfaceName = port.getPortName();
        final BigInteger fipCfgdDpnId = NatUtil.getDpnForInterface(interfaceService, interfaceName);
        if (fipCfgdDpnId.equals(BigInteger.ZERO)) {
            LOG.info("hndlTepAddForDnatInEachRtr : DNAT->Skip processing Floating ip configuration for the port {}," + "since no DPN present for it", interfaceName);
            continue;
        }
        if (!fipCfgdDpnId.equals(tepAddedDpnId)) {
            LOG.debug("hndlTepAddForDnatInEachRtr : DNAT -> TEP added DPN {} is not the DPN {} which has the " + "floating IP configured for the port: {}", tepAddedDpnId, fipCfgdDpnId, interfaceName);
            continue;
        }
        List<InternalToExternalPortMap> intExtPortMapList = port.getInternalToExternalPortMap();
        for (InternalToExternalPortMap intExtPortMap : intExtPortMapList) {
            final String internalIp = intExtPortMap.getInternalIp();
            final String externalIp = intExtPortMap.getExternalIp();
            LOG.debug("hndlTepAddForDnatInEachRtr : DNAT -> Advertising the FIB route to the floating IP {} " + "configured for the port: {}", externalIp, interfaceName);
            long serviceId = 0;
            String fibExternalIp = NatUtil.validateAndAddNetworkMask(externalIp);
            if (extNwProvType == ProviderTypes.VXLAN) {
                LOG.debug("hndlTepAddForDnatInEachRtr : DNAT -> Advertise the route to the externalIp {} " + "having nextHopIp {}", externalIp, nextHopIp);
                NatEvpnUtil.addRoutesForVxLanProvType(dataBroker, bgpManager, fibManager, vpnName, rd, externalIp, nextHopIp, l3Vni, interfaceName, gwMacAddress, writeFlowInvTx, RouteOrigin.STATIC, fipCfgdDpnId);
                serviceId = l3Vni;
            } else {
                long label = floatingIPListener.getOperationalIpMapping(routerName, interfaceName, internalIp);
                if (label == NatConstants.INVALID_ID) {
                    LOG.error("hndlTepAddForDnatInEachRtr : DNAT -> Unable to advertise to the DC GW since label " + "is invalid");
                    return;
                }
                LOG.debug("hndlTepAddForDnatInEachRtr : DNAT -> Advertise the route to the externalIp {} " + "having nextHopIp {}", externalIp, nextHopIp);
                long l3vni = 0;
                if (NatUtil.isOpenStackVniSemanticsEnforcedForGreAndVxlan(elanManager, extNwProvType)) {
                    l3vni = NatOverVxlanUtil.getInternetVpnVni(idManager, vpnName, l3vni).longValue();
                }
                NatUtil.addPrefixToBGP(dataBroker, bgpManager, fibManager, vpnName, rd, null, fibExternalIp, nextHopIp, null, null, label, l3vni, RouteOrigin.STATIC, fipCfgdDpnId);
                serviceId = label;
            }
            // Install custom FIB routes (Table 21 -> Push MPLS label to Tunnel port
            List<Instruction> customInstructions = new ArrayList<>();
            customInstructions.add(new InstructionGotoTable(NwConstants.PDNAT_TABLE).buildInstruction(0));
            CreateFibEntryInput input = new CreateFibEntryInputBuilder().setVpnName(vpnName).setSourceDpid(fipCfgdDpnId).setInstruction(customInstructions).setIpAddress(fibExternalIp).setServiceId(serviceId).setInstruction(customInstructions).build();
            Future<RpcResult<Void>> future = fibRpcService.createFibEntry(input);
            ListenableFuture<RpcResult<Void>> listenableFuture = JdkFutureAdapters.listenInPoolThread(future);
            Futures.addCallback(listenableFuture, new FutureCallback<RpcResult<Void>>() {

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

                @Override
                public void onSuccess(@Nonnull RpcResult<Void> result) {
                    if (result.isSuccessful()) {
                        LOG.info("hndlTepAddForDnatInEachRtr : DNAT -> Successfully installed custom FIB routes " + "for prefix {}", externalIp);
                    } else {
                        LOG.error("hndlTepAddForDnatInEachRtr : DNAT -> Error in rpc call to create custom Fib " + "entries for prefix {} in DPN {}, {}", externalIp, fipCfgdDpnId, result.getErrors());
                    }
                }
            }, MoreExecutors.directExecutor());
        }
    }
}

Example 49 with Interfaces

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces in project netvirt by opendaylight.

the class NatTunnelInterfaceStateListener method hndlTepDelForDnatInEachRtr.

private void hndlTepDelForDnatInEachRtr(RoutersList router, long routerId, BigInteger tepDeletedDpnId, ProviderTypes extNwProvType) {
    // DNAT : Withdraw the routes from the BGP
    String routerName = router.getRouter();
    LOG.debug("hndlTepDelForDnatInEachRtr : DNAT -> Trying to clear routes to the Floating IP " + "associated to the router {}", routerName);
    InstanceIdentifier<RouterPorts> routerPortsId = NatUtil.getRouterPortsId(routerName);
    Optional<RouterPorts> optRouterPorts = MDSALUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, routerPortsId);
    if (!optRouterPorts.isPresent()) {
        LOG.debug("hndlTepDelForDnatInEachRtr : DNAT -> Could not read Router Ports data object with id: {} " + "from DNAT FloatingIpInfo", routerName);
        return;
    }
    RouterPorts routerPorts = optRouterPorts.get();
    Uuid extNwId = routerPorts.getExternalNetworkId();
    final String vpnName = NatUtil.getAssociatedVPN(dataBroker, extNwId);
    if (vpnName == null) {
        LOG.error("hndlTepDelForDnatInEachRtr : DNAT -> No External VPN associated with Ext N/W {} for Router {}", extNwId, routerName);
        return;
    }
    String rd = NatUtil.getVpnRd(dataBroker, vpnName);
    if (extNwProvType == null) {
        return;
    }
    long l3Vni = 0;
    if (extNwProvType == ProviderTypes.VXLAN) {
        // get l3Vni value for external VPN
        l3Vni = NatEvpnUtil.getL3Vni(dataBroker, rd);
        if (l3Vni == NatConstants.DEFAULT_L3VNI_VALUE) {
            LOG.debug("hndlTepDelForDnatInEachRtr : L3VNI value is not configured in Internet VPN {} and RD {} " + "Carve-out L3VNI value from OpenDaylight VXLAN VNI Pool and continue to installing " + "NAT flows", vpnName, rd);
            l3Vni = NatOverVxlanUtil.getInternetVpnVni(idManager, vpnName, routerId).longValue();
        }
    }
    List<Ports> interfaces = routerPorts.getPorts();
    for (Ports port : interfaces) {
        // Get the DPN on which this interface resides
        String interfaceName = port.getPortName();
        BigInteger fipCfgdDpnId = NatUtil.getDpnForInterface(interfaceService, interfaceName);
        if (fipCfgdDpnId.equals(BigInteger.ZERO)) {
            LOG.info("hndlTepDelForDnatInEachRtr : DNAT -> Abort processing Floating ip configuration. " + "No DPN for port : {}", interfaceName);
            continue;
        }
        if (!fipCfgdDpnId.equals(tepDeletedDpnId)) {
            LOG.info("hndlTepDelForDnatInEachRtr : DNAT -> TEP deleted DPN {} is not the DPN {} which has the " + "floating IP configured for the port: {}", tepDeletedDpnId, fipCfgdDpnId, interfaceName);
            continue;
        }
        List<InternalToExternalPortMap> intExtPortMapList = port.getInternalToExternalPortMap();
        for (InternalToExternalPortMap intExtPortMap : intExtPortMapList) {
            String internalIp = intExtPortMap.getInternalIp();
            String externalIp = intExtPortMap.getExternalIp();
            externalIp = NatUtil.validateAndAddNetworkMask(externalIp);
            LOG.debug("hndlTepDelForDnatInEachRtr : DNAT -> Withdrawing the FIB route to the floating IP {} " + "configured for the port: {}", externalIp, interfaceName);
            NatUtil.removePrefixFromBGP(bgpManager, fibManager, rd, externalIp, vpnName, LOG);
            long serviceId = 0;
            if (extNwProvType == ProviderTypes.VXLAN) {
                serviceId = l3Vni;
            } else {
                long label = floatingIPListener.getOperationalIpMapping(routerName, interfaceName, internalIp);
                if (label == NatConstants.INVALID_ID) {
                    LOG.error("hndlTepDelForDnatInEachRtr : DNAT -> Unable to remove the table 21 entry pushing the" + " MPLS label to the tunnel since label is invalid");
                    return;
                }
                serviceId = label;
            }
            RemoveFibEntryInput input = new RemoveFibEntryInputBuilder().setVpnName(vpnName).setSourceDpid(fipCfgdDpnId).setIpAddress(externalIp).setServiceId(serviceId).setIpAddressSource(RemoveFibEntryInput.IpAddressSource.FloatingIP).build();
            Future<RpcResult<Void>> future = fibRpcService.removeFibEntry(input);
            ListenableFuture<RpcResult<Void>> listenableFuture = JdkFutureAdapters.listenInPoolThread(future);
            Futures.addCallback(listenableFuture, new FutureCallback<RpcResult<Void>>() {

                @Override
                public void onFailure(@Nonnull Throwable error) {
                    LOG.error("hndlTepDelForDnatInEachRtr : DNAT -> Error in removing the table 21 entry pushing " + "the MPLS label to the tunnel since label is invalid ", error);
                }

                @Override
                public void onSuccess(@Nonnull RpcResult<Void> result) {
                    if (result.isSuccessful()) {
                        LOG.info("hndlTepDelForDnatInEachRtr : DNAT -> Successfully removed the entry pushing the " + "MPLS label to the tunnel");
                    } else {
                        LOG.error("hndlTepDelForDnatInEachRtr : DNAT -> Error in fib rpc call to remove the table " + "21 entry pushing the MPLS label to the tunnnel due to {}", result.getErrors());
                    }
                }
            }, MoreExecutors.directExecutor());
        }
    }
}

Example 50 with Interfaces

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.Interfaces in project netvirt by opendaylight.

the class RouterToVpnListener method handleDNATConfigurationForRouterAssociation.

void handleDNATConfigurationForRouterAssociation(String routerName, String vpnName, String externalNetwork) {
    InstanceIdentifier<RouterPorts> routerPortsId = NatUtil.getRouterPortsId(routerName);
    Optional<RouterPorts> optRouterPorts = MDSALUtil.read(dataBroker, LogicalDatastoreType.CONFIGURATION, routerPortsId);
    if (!optRouterPorts.isPresent()) {
        LOG.debug("handleDNATConfigurationForRouterAssociation : Could not read Router Ports data " + "object with id: {} to handle associate vpn {}", routerName, vpnName);
        return;
    }
    Uuid networkId = Uuid.getDefaultInstance(externalNetwork);
    RouterPorts routerPorts = optRouterPorts.get();
    List<Ports> interfaces = routerPorts.getPorts();
    for (Ports port : interfaces) {
        String portName = port.getPortName();
        BigInteger dpnId = NatUtil.getDpnForInterface(interfaceManager, portName);
        if (dpnId.equals(BigInteger.ZERO)) {
            LOG.warn("handleDNATConfigurationForRouterAssociation : DPN not found for {}, " + "skip handling of router {} association with vpn {}", portName, routerName, vpnName);
            continue;
        }
        List<InternalToExternalPortMap> intExtPortMapList = port.getInternalToExternalPortMap();
        for (InternalToExternalPortMap intExtPortMap : intExtPortMapList) {
            // remove all NAT related entries with routerName
            // floatingIpListener.removeNATOnlyFlowEntries(dpnId, portName, routerName, null,
            // intExtPortMap.getInternalIp(), externalIp);
            // Create NAT entries with VPN Id
            LOG.debug("handleDNATConfigurationForRouterAssociation : Updating DNAT flows with VPN metadata {} ", vpnName);
            floatingIpListener.createNATOnlyFlowEntries(dpnId, routerName, vpnName, networkId, intExtPortMap);
        }
    }
}