Examples with ProviderTypes org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ProviderTypes used on opensource projects

Example 21 with ProviderTypes

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ProviderTypes 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 22 with ProviderTypes

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ProviderTypes 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 23 with ProviderTypes

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ProviderTypes in project netvirt by opendaylight.

the class NatTunnelInterfaceStateListener method hndlTepDelForSnatInEachRtr.

private void hndlTepDelForSnatInEachRtr(RoutersList router, long routerId, BigInteger dpnId, String tunnelType, String srcTepIp, String destTepIp, String tunnelName, ProviderTypes extNwProvType, WriteTransaction writeFlowInvTx) {
    /*SNAT :
            1) Elect a new switch as the primary NAPT
            2) Advertise the new routes to BGP for the newly elected TEP IP as the DPN IP
            3) This will make sure old routes are withdrawn and new routes are advertised.
         */
    String routerName = router.getRouter();
    LOG.debug("hndlTepDelForSnatInEachRtr : SNAT -> Trying to clear routes to the External fixed IP associated " + "to the router {}", routerName);
    // Check if this is externalRouter else ignore
    InstanceIdentifier<Routers> extRoutersId = NatUtil.buildRouterIdentifier(routerName);
    Optional<Routers> routerData = SingleTransactionDataBroker.syncReadOptionalAndTreatReadFailedExceptionAsAbsentOptional(dataBroker, LogicalDatastoreType.CONFIGURATION, extRoutersId);
    if (!routerData.isPresent()) {
        LOG.debug("hndlTepDelForSnatInEachRtr : SNAT->Ignoring TEP del for router {} since its not External Router", routerName);
        return;
    }
    // Check if the DPN having the router is the NAPT switch
    BigInteger naptId = NatUtil.getPrimaryNaptfromRouterName(dataBroker, routerName);
    if (naptId == null || naptId.equals(BigInteger.ZERO) || !naptId.equals(dpnId)) {
        LOG.warn("hndlTepDelForSnatInEachRtr : SNAT -> Ignoring TEP delete for the DPN {} since" + " its NOT a NAPT switch for the TUNNEL TYPE {} b/w SRC IP {} and DST IP {} and" + "TUNNEL NAME {} ", dpnId, tunnelType, srcTepIp, destTepIp, tunnelName);
        return;
    }
    if (natMode == NatMode.Conntrack) {
        natServiceManager.notify(routerData.get(), naptId, dpnId, SnatServiceManager.Action.SNAT_ROUTER_DISBL);
    } else {
        Uuid networkId = routerData.get().getNetworkId();
        if (networkId == null) {
            LOG.error("hndlTepDelForSnatInEachRtr : SNAT->Ignoring TEP delete for the DPN {} having the router {} " + "since the Router instance {} not found in ExtRouters model b/w SRC IP {} and DST " + "IP {} and TUNNEL NAME {} ", dpnId, routerData.get().getRouterName(), tunnelType, srcTepIp, destTepIp, tunnelName);
            return;
        }
        LOG.debug("hndlTepDelForSnatInEachRtr : SNAT->Router {} is associated with ext nw {}", routerId, networkId);
        Uuid bgpVpnUuid = NatUtil.getVpnForRouter(dataBroker, routerName);
        Long bgpVpnId;
        if (bgpVpnUuid == null) {
            LOG.debug("hndlTepDelForSnatInEachRtr : SNAT->Internal VPN-ID {} associated to router {}", routerId, routerName);
            bgpVpnId = routerId;
            // Install default entry in FIB to SNAT table
            LOG.debug("hndlTepDelForSnatInEachRtr : Installing default route in FIB on DPN {} for router {} with" + " vpn {}...", dpnId, routerName, bgpVpnId);
            defaultRouteProgrammer.installDefNATRouteInDPN(dpnId, bgpVpnId, writeFlowInvTx);
        } else {
            bgpVpnId = NatUtil.getVpnId(dataBroker, bgpVpnUuid.getValue());
            if (bgpVpnId == NatConstants.INVALID_ID) {
                LOG.error("hndlTepDelForSnatInEachRtr :SNAT->Invalid Private BGP VPN ID returned for routerName {}", routerName);
                return;
            }
            LOG.debug("hndlTepDelForSnatInEachRtr :SNAT->External BGP VPN (Private BGP) {} associated to router {}", bgpVpnId, routerName);
            // Install default entry in FIB to SNAT table
            LOG.debug("hndlTepDelForSnatInEachRtr : Installing default route in FIB on dpn {} for routerId {} " + "with vpnId {}...", dpnId, routerId, bgpVpnId);
            defaultRouteProgrammer.installDefNATRouteInDPN(dpnId, bgpVpnId, routerId, writeFlowInvTx);
        }
        if (routerData.get().isEnableSnat()) {
            LOG.info("hndlTepDelForSnatInEachRtr : SNAT enabled for router {}", routerId);
            long routerVpnId = routerId;
            if (bgpVpnId != NatConstants.INVALID_ID) {
                LOG.debug("hndlTepDelForSnatInEachRtr : SNAT -> Private BGP VPN ID (Internal BGP VPN ID) {} " + "associated to the router {}", bgpVpnId, routerName);
                routerVpnId = bgpVpnId;
            } else {
                LOG.debug("hndlTepDelForSnatInEachRtr : SNAT -> Internal L3 VPN ID (Router ID) {} " + "associated to the router {}", routerVpnId, routerName);
            }
            // Re-elect the other available switch as the NAPT switch and program the NAT flows.
            removeSNATFromDPN(dpnId, routerName, routerId, routerVpnId, networkId, extNwProvType, writeFlowInvTx);
        } else {
            LOG.info("hndlTepDelForSnatInEachRtr : SNAT is not enabled for router {} to handle addDPN event {}", routerId, dpnId);
        }
    }
}

Example 24 with ProviderTypes

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ProviderTypes in project netvirt by opendaylight.

the class RouterDpnChangeListener method handleSNATForDPN.

// TODO Clean up the exception handling
@SuppressWarnings("checkstyle:IllegalCatch")
void handleSNATForDPN(BigInteger dpnId, String routerName, long routerId, Long routerVpnId, WriteTransaction writeFlowInvTx, WriteTransaction removeFlowInvTx, ProviderTypes extNwProvType) {
    // Check if primary and secondary switch are selected, If not select the role
    // Install select group to NAPT switch
    // Install default miss entry to NAPT switch
    BigInteger naptSwitch;
    try {
        BigInteger naptId = NatUtil.getPrimaryNaptfromRouterName(dataBroker, routerName);
        if (naptId == null || naptId.equals(BigInteger.ZERO) || !naptSwitchHA.getSwitchStatus(naptId)) {
            LOG.debug("handleSNATForDPN : No NaptSwitch is selected for router {}", routerName);
            naptSwitch = dpnId;
            boolean naptstatus = naptSwitchHA.updateNaptSwitch(routerName, naptSwitch);
            if (!naptstatus) {
                LOG.error("handleSNATForDPN : Failed to update newNaptSwitch {} for routername {}", naptSwitch, routerName);
                return;
            }
            LOG.debug("handleSNATForDPN : Switch {} is elected as NaptSwitch for router {}", dpnId, routerName);
            // When NAPT switch is elected during first VM comes up for the given Router
            if (NatUtil.isOpenStackVniSemanticsEnforcedForGreAndVxlan(elanManager, extNwProvType)) {
                NatOverVxlanUtil.validateAndCreateVxlanVniPool(dataBroker, nvpnManager, idManager, NatConstants.ODL_VNI_POOL_NAME);
            }
            Routers extRouters = NatUtil.getRoutersFromConfigDS(dataBroker, routerName);
            if (extRouters != null) {
                NatUtil.createRouterIdsConfigDS(dataBroker, routerId, routerName);
                naptSwitchHA.subnetRegisterMapping(extRouters, routerId);
            }
            naptSwitchHA.installSnatFlows(routerName, routerId, naptSwitch, routerVpnId, writeFlowInvTx);
            // Install miss entry (table 26) pointing to table 46
            FlowEntity flowEntity = naptSwitchHA.buildSnatFlowEntityForNaptSwitch(dpnId, routerName, routerVpnId, NatConstants.ADD_FLOW);
            if (flowEntity == null) {
                LOG.error("handleSNATForDPN : Failed to populate flowentity for router {} with dpnId {}", routerName, dpnId);
                return;
            }
            LOG.debug("handleSNATForDPN : Successfully installed flow for dpnId {} router {}", dpnId, routerName);
            mdsalManager.addFlowToTx(flowEntity, writeFlowInvTx);
            // Removing primary flows from old napt switch
            if (naptId != null && !naptId.equals(BigInteger.ZERO)) {
                LOG.debug("handleSNATForDPN : Removing primary flows from old napt switch {} for router {}", naptId, routerName);
                naptSwitchHA.removeSnatFlowsInOldNaptSwitch(routerName, routerId, naptId, null, removeFlowInvTx);
            }
        } else if (naptId.equals(dpnId)) {
            LOG.debug("handleSNATForDPN : NaptSwitch {} gone down during cluster reboot came alive", naptId);
        } else {
            naptSwitch = naptId;
            LOG.debug("handleSNATForDPN : Napt switch with Id {} is already elected for router {}", naptId, routerName);
            // installing group
            List<BucketInfo> bucketInfo = naptSwitchHA.handleGroupInNeighborSwitches(dpnId, routerName, routerId, naptSwitch);
            naptSwitchHA.installSnatGroupEntry(dpnId, bucketInfo, routerName);
            // Install miss entry (table 26) pointing to group
            long groupId = NatUtil.createGroupId(NatUtil.getGroupIdKey(routerName), idManager);
            FlowEntity flowEntity = naptSwitchHA.buildSnatFlowEntity(dpnId, routerName, groupId, routerVpnId, NatConstants.ADD_FLOW);
            if (flowEntity == null) {
                LOG.error("handleSNATForDPN : Failed to populate flowentity for router {} with dpnId {} groupId {}", routerName, dpnId, groupId);
                return;
            }
            LOG.debug("handleSNATForDPN : Successfully installed flow for dpnId {} router {} group {}", dpnId, routerName, groupId);
            mdsalManager.addFlowToTx(flowEntity, writeFlowInvTx);
        }
    } catch (Exception ex) {
        LOG.error("handleSNATForDPN : Exception in handleSNATForDPN", ex);
    }
}

Example 25 with ProviderTypes

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.natservice.rev160111.ProviderTypes in project netvirt by opendaylight.

the class RouterToVpnListener method onRouterAssociatedToVpn.

/**
 * router association to vpn.
 */
@Override
public void onRouterAssociatedToVpn(RouterAssociatedToVpn notification) {
    String routerName = notification.getRouterId().getValue();
    String vpnName = notification.getVpnId().getValue();
    WriteTransaction writeFlowInvTx = dataBroker.newWriteOnlyTransaction();
    // check router is associated to external network
    String extNetwork = NatUtil.getAssociatedExternalNetwork(dataBroker, routerName);
    if (extNetwork != null) {
        LOG.debug("onRouterAssociatedToVpn : Router {} is associated with ext nw {}", routerName, extNetwork);
        handleDNATConfigurationForRouterAssociation(routerName, vpnName, extNetwork);
        Uuid extNetworkUuid = NatUtil.getNetworkIdFromRouterName(dataBroker, routerName);
        if (extNetworkUuid == null) {
            LOG.error("onRouterAssociatedToVpn : Unable to retrieve external network Uuid for router {}", routerName);
            return;
        }
        ProviderTypes extNwProvType = NatEvpnUtil.getExtNwProvTypeFromRouterName(dataBroker, routerName, extNetworkUuid);
        if (extNwProvType == null) {
            LOG.error("onRouterAssociatedToVpn : External Network Provider Type missing");
            return;
        }
        long routerId = NatUtil.getVpnId(dataBroker, routerName);
        externalRoutersListener.changeLocalVpnIdToBgpVpnId(routerName, routerId, vpnName, writeFlowInvTx, extNwProvType);
    } else {
        LOG.debug("onRouterAssociatedToVpn : Ignoring the Router {} association with VPN {} " + "since it is not external router", routerName, vpnName);
    }
    NatUtil.waitForTransactionToComplete(writeFlowInvTx);
}