Examples with Bgp org.opendaylight.yang.gen.v1.urn.ericsson.params.xml.ns.yang.ebgp.rev150901.Bgp used on opensource projects

Example 91 with Bgp

use of org.opendaylight.yang.gen.v1.urn.ericsson.params.xml.ns.yang.ebgp.rev150901.Bgp in project netvirt by opendaylight.

the class EvpnSnatFlowProgrammer method evpnAdvToBgpAndInstallFibAndTsFlows.

public void evpnAdvToBgpAndInstallFibAndTsFlows(final BigInteger dpnId, final short tableId, final String externalIp, final String vpnName, final String rd, final String nextHopIp, final WriteTransaction writeTx, final long routerId, final String routerName, WriteTransaction writeFlowInvTx) {
    /*
      * 1) Install the flow INTERNAL_TUNNEL_TABLE (table=36)-> INBOUND_NAPT_TABLE (table=44)
      *    (FIP VM on DPN1 is responding back to external fixed IP on DPN2) {DNAT to SNAT traffic on
      *     different Hypervisor}
      *
      * 2) Install the flow L3_GW_MAC_TABLE (table=19)-> INBOUND_NAPT_TABLE (table=44)
      *    (FIP VM on DPN1 is responding back to external fixed IP on beyond DC-GW VM){DNAT to SNAT Inter DC traffic}
      *
      * 3) Install the flow PDNAT_TABLE (table=25)-> INBOUND_NAPT_TABLE (table=44)
      *    (If there is no FIP Match on table 25 (PDNAT_TABLE) then default flow to INBOUND_NAPT_TABLE (table=44))
      *
      * 4) Install the flow L3_FIB_TABLE (table=21)-> INBOUND_NAPT_TABLE (table=44)
      *    (FIP VM on DPN1 is responding back to external fixed Ip on DPN1 itself. ie. same Hypervisor)
      *    {DNAT to SNAT Intra DC traffic}
      */
    LOG.info("evpnAdvToBgpAndInstallFibAndTsFlows : Handling SNAT Reverse Traffic for External Fixed IP {} for " + "RouterId {}", externalIp, routerId);
    // Get the External Gateway MAC Address which is Router gateway MAC address for SNAT
    String gwMacAddress = NatUtil.getExtGwMacAddFromRouterName(dataBroker, routerName);
    if (gwMacAddress == null) {
        LOG.error("evpnAdvToBgpAndInstallFibAndTsFlows : Unable to Retrieve External Gateway MAC address " + "from Router ID {}", routerId);
        return;
    }
    // get l3Vni value for external VPN
    long l3Vni = NatEvpnUtil.getL3Vni(dataBroker, rd);
    if (l3Vni == NatConstants.DEFAULT_L3VNI_VALUE) {
        LOG.debug("evpnAdvToBgpAndInstallFibAndTsFlows : L3VNI value is not configured in Internet VPN {}" + " and RD {} Carve-out L3VNI value from OpenDaylight VXLAN VNI Pool and continue with " + "installing SNAT flows for External Fixed IP {}", vpnName, rd, externalIp);
        l3Vni = NatOverVxlanUtil.getInternetVpnVni(idManager, vpnName, routerId).longValue();
    }
    long vpnId = NatUtil.getVpnId(dataBroker, vpnName);
    if (vpnId == NatConstants.INVALID_ID) {
        LOG.error("evpnAdvToBgpAndInstallFibAndTsFlows : Invalid Vpn Id is found for Vpn Name {}", vpnName);
        return;
    }
    /* As of now neither SNAT nor DNAT will use mac-address while advertising to FIB and BGP instead
         * use only gwMacAddress. Hence default value of macAddress is null
         */
    // Inform to BGP
    NatEvpnUtil.addRoutesForVxLanProvType(dataBroker, bgpManager, fibManager, vpnName, rd, externalIp, nextHopIp, l3Vni, null, /*InterfaceName*/
    gwMacAddress, writeTx, RouteOrigin.STATIC, dpnId);
    // Install custom FIB routes - FIB table.
    List<Instruction> customInstructions = new ArrayList<>();
    customInstructions.add(new InstructionGotoTable(tableId).buildInstruction(0));
    final String externalFixedIp = NatUtil.validateAndAddNetworkMask(externalIp);
    CreateFibEntryInput input = new CreateFibEntryInputBuilder().setVpnName(vpnName).setSourceDpid(dpnId).setIpAddress(externalFixedIp).setServiceId(l3Vni).setIpAddressSource(CreateFibEntryInput.IpAddressSource.ExternalFixedIP).setInstruction(customInstructions).build();
    LOG.debug("evpnAdvToBgpAndInstallFibAndTsFlows : Installing custom FIB table {} --> table {} flow on " + "NAPT Switch {} with l3Vni {}, ExternalFixedIp {}, ExternalVpnName {} for RouterId {}", NwConstants.L3_FIB_TABLE, tableId, dpnId, l3Vni, externalIp, vpnName, routerId);
    Future<RpcResult<Void>> future1 = fibService.createFibEntry(input);
    ListenableFuture<RpcResult<Void>> futureVxlan = JdkFutureAdapters.listenInPoolThread(future1);
    final long finalL3Vni = l3Vni;
    Futures.addCallback(futureVxlan, new FutureCallback<RpcResult<Void>>() {

        @Override
        public void onFailure(@Nonnull Throwable error) {
            LOG.error("evpnAdvToBgpAndInstallFibAndTsFlows : Error in custom fib routes install process for " + "External Fixed IP {} on DPN {} with l3Vni {}, ExternalVpnName {} for RouterId {}", externalIp, dpnId, finalL3Vni, vpnName, routerId, error);
        }

        @Override
        public void onSuccess(@Nonnull RpcResult<Void> result) {
            if (result.isSuccessful()) {
                LOG.info("evpnAdvToBgpAndInstallFibAndTsFlows : Successfully installed custom FIB routes for " + "External Fixed IP {} on DPN {} with l3Vni {}, ExternalVpnName {} for RouterId {}", externalIp, dpnId, finalL3Vni, vpnName, routerId);
                /* Install the flow INTERNAL_TUNNEL_TABLE (table=36)-> INBOUND_NAPT_TABLE (table=44)
                  * (SNAT to DNAT reverse Traffic: If traffic is Initiated from NAPT to FIP VM on different Hypervisor)
                  */
                makeTunnelTableEntry(dpnId, finalL3Vni, customInstructions, tableId, writeFlowInvTx);
                /* Install the flow L3_GW_MAC_TABLE (table=19)-> INBOUND_NAPT_TABLE (table=44)
                  * (SNAT reverse traffic: If the traffic is Initiated from DC-GW to VM (SNAT Reverse traffic))
                  */
                NatEvpnUtil.makeL3GwMacTableEntry(dpnId, vpnId, gwMacAddress, customInstructions, mdsalManager, writeFlowInvTx);
                /* Install the flow PDNAT_TABLE (table=25)-> INBOUND_NAPT_TABLE (table=44)
                  * If there is no FIP Match on table 25 (PDNAT_TABLE)
                  */
                NatUtil.makePreDnatToSnatTableEntry(mdsalManager, dpnId, tableId, writeFlowInvTx);
            }
        }
    }, MoreExecutors.directExecutor());
}

Example 92 with Bgp

use of org.opendaylight.yang.gen.v1.urn.ericsson.params.xml.ns.yang.ebgp.rev150901.Bgp in project netvirt by opendaylight.

the class ExternalRoutersListener method allocateExternalIp.

private void allocateExternalIp(BigInteger dpnId, Routers router, long routerId, String routerName, Uuid networkId, String subnetIp, WriteTransaction writeFlowInvTx) {
    String[] subnetIpParts = NatUtil.getSubnetIpAndPrefix(subnetIp);
    try {
        InetAddress address = InetAddress.getByName(subnetIpParts[0]);
        if (address instanceof Inet6Address) {
            LOG.debug("allocateExternalIp : Skipping ipv6 address {} for the router {}.", address, routerName);
            return;
        }
    } catch (UnknownHostException e) {
        LOG.error("allocateExternalIp : Invalid ip address {}", subnetIpParts[0], e);
        return;
    }
    String leastLoadedExtIpAddr = NatUtil.getLeastLoadedExternalIp(dataBroker, routerId);
    if (leastLoadedExtIpAddr != null) {
        String[] externalIpParts = NatUtil.getExternalIpAndPrefix(leastLoadedExtIpAddr);
        String leastLoadedExtIp = externalIpParts[0];
        String leastLoadedExtIpPrefix = externalIpParts[1];
        IPAddress externalIpAddr = new IPAddress(leastLoadedExtIp, Integer.parseInt(leastLoadedExtIpPrefix));
        subnetIp = subnetIpParts[0];
        String subnetIpPrefix = subnetIpParts[1];
        IPAddress subnetIpAddr = new IPAddress(subnetIp, Integer.parseInt(subnetIpPrefix));
        LOG.debug("allocateExternalIp : Add the IP mapping for the router ID {} and internal " + "IP {} and prefix {} -> external IP {} and prefix {}", routerId, subnetIp, subnetIpPrefix, leastLoadedExtIp, leastLoadedExtIpPrefix);
        naptManager.registerMapping(routerId, subnetIpAddr, externalIpAddr);
        // Check if external IP is already assigned a route. (i.e. External IP is previously
        // allocated to any of the subnets)
        // If external IP is already assigned a route, (, do not re-advertise to the BGP
        String leastLoadedExtIpAddrStr = leastLoadedExtIp + "/" + leastLoadedExtIpPrefix;
        Long label = checkExternalIpLabel(routerId, leastLoadedExtIpAddrStr);
        if (label != null) {
            // update
            String internalIp = subnetIpParts[0] + "/" + subnetIpParts[1];
            IpMapKey ipMapKey = new IpMapKey(internalIp);
            LOG.debug("allocateExternalIp : Setting label {} for internalIp {} and externalIp {}", label, internalIp, leastLoadedExtIpAddrStr);
            IpMap newIpm = new IpMapBuilder().setKey(ipMapKey).setInternalIp(internalIp).setExternalIp(leastLoadedExtIpAddrStr).setLabel(label).build();
            MDSALUtil.syncWrite(dataBroker, LogicalDatastoreType.OPERATIONAL, naptManager.getIpMapIdentifier(routerId, internalIp), newIpm);
            return;
        }
        // Re-advertise to the BGP for the external IP, which is allocated to the subnet
        // for the first time and hence not having a route.
        // Get the VPN Name using the network ID
        final String vpnName = NatUtil.getAssociatedVPN(dataBroker, networkId);
        if (vpnName != null) {
            LOG.debug("allocateExternalIp : Retrieved vpnName {} for networkId {}", vpnName, networkId);
            if (dpnId == null || dpnId.equals(BigInteger.ZERO)) {
                LOG.debug("allocateExternalIp : Best effort for getting primary napt switch when router i/f are" + "added after gateway-set");
                dpnId = NatUtil.getPrimaryNaptfromRouterId(dataBroker, routerId);
                if (dpnId == null || dpnId.equals(BigInteger.ZERO)) {
                    LOG.error("allocateExternalIp : dpnId is null or Zero for the router {}", routerName);
                    return;
                }
            }
            advToBgpAndInstallFibAndTsFlows(dpnId, NwConstants.INBOUND_NAPT_TABLE, vpnName, routerId, routerName, leastLoadedExtIp + "/" + leastLoadedExtIpPrefix, networkId, router, writeFlowInvTx);
        }
    }
}

Example 93 with Bgp

use of org.opendaylight.yang.gen.v1.urn.ericsson.params.xml.ns.yang.ebgp.rev150901.Bgp in project netvirt by opendaylight.

the class ExternalRoutersListener method changeBgpVpnIdToLocalVpnId.

/**
 * router disassociation from vpn.
 *
 * @param routerName - Name of router
 * @param routerId - router id
 * @param bgpVpnName BGP VPN name
 */
public void changeBgpVpnIdToLocalVpnId(String routerName, long routerId, String bgpVpnName, WriteTransaction writeFlowInvTx, ProviderTypes extNwProvType) {
    LOG.debug("changeBgpVpnIdToLocalVpnId : Router dissociated from BGP VPN");
    if (chkExtRtrAndSnatEnbl(new Uuid(routerName))) {
        long bgpVpnId = NatUtil.getVpnId(dataBroker, bgpVpnName);
        LOG.debug("changeBgpVpnIdToLocalVpnId : BGP VPN ID value {} ", bgpVpnId);
        // Get the allocated Primary NAPT Switch for this router
        LOG.debug("changeBgpVpnIdToLocalVpnId : Router ID value {} ", routerId);
        LOG.debug("changeBgpVpnIdToLocalVpnId : Update the BGP VPN ID {} to the Router ID {}", bgpVpnId, routerId);
        addOrDelDefaultFibRouteForSnatWithBgpVpn(routerName, routerId, NatConstants.INVALID_ID, true, writeFlowInvTx);
        // Get the group ID
        createGroupId(getGroupIdKey(routerName));
        BigInteger primarySwitchId = NatUtil.getPrimaryNaptfromRouterName(dataBroker, routerName);
        installFlowsWithUpdatedVpnId(primarySwitchId, routerName, NatConstants.INVALID_ID, routerId, true, writeFlowInvTx, extNwProvType);
    }
}

Example 94 with Bgp

use of org.opendaylight.yang.gen.v1.urn.ericsson.params.xml.ns.yang.ebgp.rev150901.Bgp in project netvirt by opendaylight.

the class EvpnDnatFlowProgrammer method onRemoveFloatingIp.

public void onRemoveFloatingIp(final BigInteger dpnId, final String vpnName, final String externalIp, final String floatingIpInterface, final String floatingIpPortMacAddress, final long routerId, WriteTransaction removeFlowInvTx) {
    /*
     *  1) Remove the flow INTERNAL_TUNNEL_TABLE (table=36)-> PDNAT_TABLE (table=25) (SNAT VM on DPN1 is
     *     responding back to FIP VM on DPN2) {SNAT to DNAT traffic on different Hypervisor}
     *
     *  2) Remove the flow L3_FIB_TABLE (table=21)-> PDNAT_TABLE (table=25) (FIP VM1 to FIP VM2
     *    Traffic on Same Hypervisor) {DNAT to DNAT on Same Hypervisor}
     *
     *  3) Remove the flow L3_GW_MAC_TABLE (table=19)-> PDNAT_TABLE (table=25)
     *    (DC-GW is responding back to FIP VM) {DNAT Reverse traffic})
     *
     */
    String rd = NatUtil.getVpnRd(dataBroker, vpnName);
    if (rd == null) {
        LOG.error("onRemoveFloatingIp : Could not retrieve RD value from VPN Name {}  ", vpnName);
        return;
    }
    long vpnId = NatUtil.getVpnId(dataBroker, vpnName);
    if (vpnId == NatConstants.INVALID_ID) {
        LOG.error("onRemoveFloatingIp : Invalid Vpn Id is found for Vpn Name {}", vpnName);
        return;
    }
    long l3Vni = NatEvpnUtil.getL3Vni(dataBroker, rd);
    if (l3Vni == NatConstants.DEFAULT_L3VNI_VALUE) {
        LOG.debug("onRemoveFloatingIp : L3VNI value is not configured in Internet VPN {} and RD {} " + "Carve-out L3VNI value from OpenDaylight VXLAN VNI Pool and continue with installing " + "DNAT flows for FloatingIp {}", vpnName, rd, externalIp);
        l3Vni = NatOverVxlanUtil.getInternetVpnVni(idManager, vpnName, routerId).longValue();
    }
    String fibExternalIp = NatUtil.validateAndAddNetworkMask(externalIp);
    // Remove Prefix from BGP
    NatUtil.removePrefixFromBGP(bgpManager, fibManager, rd, fibExternalIp, vpnName, LOG);
    // Remove custom FIB routes flow for L3_FIB_TABLE (table=21)-> PDNAT_TABLE (table=25)
    RemoveFibEntryInput input = new RemoveFibEntryInputBuilder().setVpnName(vpnName).setSourceDpid(dpnId).setIpAddress(fibExternalIp).setServiceId(l3Vni).setIpAddressSource(RemoveFibEntryInput.IpAddressSource.FloatingIP).build();
    Future<RpcResult<Void>> future = fibService.removeFibEntry(input);
    ListenableFuture<RpcResult<Void>> futureVxlan = JdkFutureAdapters.listenInPoolThread(future);
    final long finalL3Vni = l3Vni;
    Futures.addCallback(futureVxlan, new FutureCallback<RpcResult<Void>>() {

        @Override
        public void onFailure(@Nonnull Throwable error) {
            LOG.error("onRemoveFloatingIp : Error {} in custom fib routes remove process for Floating " + "IP Prefix {} on DPN {}", error, externalIp, dpnId);
        }

        @Override
        public void onSuccess(@Nonnull RpcResult<Void> result) {
            if (result.isSuccessful()) {
                LOG.info("onRemoveFloatingIp : Successfully removed custom FIB routes for Floating " + "IP Prefix {} on DPN {}", externalIp, dpnId);
                /*  check if any floating IP information is available in vpn-to-dpn-list for given dpn id.
                      *  If exist any floating IP then do not remove
                      *  INTERNAL_TUNNEL_TABLE (table=36) -> PDNAT_TABLE (table=25) flow entry.
                      */
                if (!NatUtil.isFloatingIpPresentForDpn(dataBroker, dpnId, rd, vpnName, externalIp, false)) {
                    // Remove the flow for INTERNAL_TUNNEL_TABLE (table=36)-> PDNAT_TABLE (table=25)
                    removeTunnelTableEntry(dpnId, finalL3Vni, removeFlowInvTx);
                }
                // Remove the flow for L3_GW_MAC_TABLE (table=19)-> PDNAT_TABLE (table=25)
                NatEvpnUtil.removeL3GwMacTableEntry(dpnId, vpnId, floatingIpPortMacAddress, mdsalManager, removeFlowInvTx);
                NatUtil.waitForTransactionToComplete(removeFlowInvTx);
            } else {
                LOG.error("onRemoveFloatingIp : Error {} in rpc call to remove custom Fib entries for Floating " + "IP Prefix {} on DPN {}", result.getErrors(), externalIp, dpnId);
            }
        }
    }, MoreExecutors.directExecutor());
    // Read the FIP vpn-interface details from Operational l3vpn:vpn-interfaces model and delete from Operational DS
    InstanceIdentifier<VpnInterface> vpnIfIdentifier = NatUtil.getVpnInterfaceIdentifier(floatingIpInterface);
    Optional<VpnInterface> optionalVpnInterface = SingleTransactionDataBroker.syncReadOptionalAndTreatReadFailedExceptionAsAbsentOptional(dataBroker, LogicalDatastoreType.CONFIGURATION, vpnIfIdentifier);
    if (optionalVpnInterface.isPresent()) {
        WriteTransaction writeOperTxn = dataBroker.newWriteOnlyTransaction();
        for (VpnInstanceNames vpnInstance : optionalVpnInterface.get().getVpnInstanceNames()) {
            if (!vpnName.equals(vpnInstance.getVpnName())) {
                continue;
            }
            InstanceIdentifier<VpnInterfaceOpDataEntry> vpnOpIfIdentifier = NatUtil.getVpnInterfaceOpDataEntryIdentifier(floatingIpInterface, vpnName);
            writeOperTxn.delete(LogicalDatastoreType.OPERATIONAL, vpnOpIfIdentifier);
            break;
        }
        ListenableFuture<Void> futures = writeOperTxn.submit();
        String errorText = "onRemoveFloatingIp : Could not remove vpnInterface " + floatingIpInterface + " vpnName " + vpnName + " from Operational odl-l3vpn:vpn-interface-op-data";
        ListenableFutures.addErrorLogging(futures, LOG, errorText);
        LOG.debug("onRemoveFloatingIp : Remove vpnInterface {} vpnName {} " + "to Operational odl-l3vpn:vpn-interface-op-data", floatingIpInterface, vpnName);
    } else {
        LOG.debug("onRemoveFloatingIp : No vpnInterface {} found " + "in Operational odl-l3vpn:vpn-interface-op-data", floatingIpInterface);
    }
}

Example 95 with Bgp

use of org.opendaylight.yang.gen.v1.urn.ericsson.params.xml.ns.yang.ebgp.rev150901.Bgp in project netvirt by opendaylight.

the class EvpnDnatFlowProgrammer method onAddFloatingIp.

public void onAddFloatingIp(final BigInteger dpnId, final String routerName, final long routerId, final String vpnName, final String internalIp, final String externalIp, final Uuid networkId, final String interfaceName, final String floatingIpInterface, final String floatingIpPortMacAddress, final String rd, final String nextHopIp, final WriteTransaction writeFlowInvTx) {
    /*
     *  1) Install the flow INTERNAL_TUNNEL_TABLE (table=36)-> PDNAT_TABLE (table=25) (SNAT VM on DPN1 is
     *     responding back to FIP VM on DPN2) {SNAT to DNAT traffic on different Hypervisor}
     *
     *  2) Install the flow L3_FIB_TABLE (table=21)-> PDNAT_TABLE (table=25) (FIP VM1 to FIP VM2
     *    Traffic on Same Hypervisor) {DNAT to DNAT on Same Hypervisor}
     *
     *  3) Install the flow L3_GW_MAC_TABLE (table=19)-> PDNAT_TABLE (table=25)
     *    (DC-GW is responding back to FIP VM) {DNAT Reverse traffic})
     *
     */
    long vpnId = NatUtil.getVpnId(dataBroker, vpnName);
    if (vpnId == NatConstants.INVALID_ID) {
        LOG.error("onAddFloatingIp : Invalid Vpn Id is found for Vpn Name {}", vpnName);
        return;
    }
    long l3Vni = NatEvpnUtil.getL3Vni(dataBroker, rd);
    if (l3Vni == NatConstants.DEFAULT_L3VNI_VALUE) {
        LOG.debug("onAddFloatingIp : L3VNI value is not configured in Internet VPN {} and RD {} " + "Carve-out L3VNI value from OpenDaylight VXLAN VNI Pool and continue with installing " + "DNAT flows for FloatingIp {}", vpnName, rd, externalIp);
        l3Vni = NatOverVxlanUtil.getInternetVpnVni(idManager, vpnName, routerId).longValue();
    }
    FloatingIPListener.updateOperationalDS(dataBroker, routerName, interfaceName, NatConstants.DEFAULT_LABEL_VALUE, internalIp, externalIp);
    String fibExternalIp = NatUtil.validateAndAddNetworkMask(externalIp);
    // Inform to FIB and BGP
    NatEvpnUtil.addRoutesForVxLanProvType(dataBroker, bgpManager, fibManager, vpnName, rd, fibExternalIp, nextHopIp, l3Vni, floatingIpInterface, floatingIpPortMacAddress, writeFlowInvTx, RouteOrigin.STATIC, dpnId);
    /* Install the flow table L3_FIB_TABLE (table=21)-> PDNAT_TABLE (table=25)
         * (SNAT to DNAT reverse traffic: If the DPN has both SNAT and  DNAT configured )
         */
    List<ActionInfo> actionInfoFib = new ArrayList<>();
    actionInfoFib.add(new ActionSetFieldEthernetDestination(new MacAddress(floatingIpPortMacAddress)));
    List<Instruction> instructionsFib = new ArrayList<>();
    instructionsFib.add(new InstructionApplyActions(actionInfoFib).buildInstruction(0));
    instructionsFib.add(new InstructionGotoTable(NwConstants.PDNAT_TABLE).buildInstruction(1));
    CreateFibEntryInput input = new CreateFibEntryInputBuilder().setVpnName(vpnName).setSourceDpid(dpnId).setIpAddress(fibExternalIp).setServiceId(l3Vni).setIpAddressSource(CreateFibEntryInput.IpAddressSource.FloatingIP).setInstruction(instructionsFib).build();
    Future<RpcResult<Void>> future1 = fibService.createFibEntry(input);
    ListenableFuture<RpcResult<Void>> futureVxlan = JdkFutureAdapters.listenInPoolThread(future1);
    LOG.debug("onAddFloatingIp : Add Floating Ip {} , found associated to fixed port {}", externalIp, interfaceName);
    if (floatingIpPortMacAddress != null) {
        WriteTransaction writeTx = dataBroker.newWriteOnlyTransaction();
        vpnManager.addSubnetMacIntoVpnInstance(vpnName, null, floatingIpPortMacAddress, dpnId, writeTx);
        vpnManager.addArpResponderFlowsToExternalNetworkIps(routerName, Collections.singleton(externalIp), floatingIpPortMacAddress, dpnId, networkId, writeTx);
        writeTx.submit();
    }
    final long finalL3Vni = l3Vni;
    Futures.addCallback(futureVxlan, new FutureCallback<RpcResult<Void>>() {

        @Override
        public void onFailure(@Nonnull Throwable error) {
            LOG.error("onAddFloatingIp : Error {} in custom fib routes install process for Floating " + "IP Prefix {} on DPN {}", error, externalIp, dpnId);
        }

        @Override
        public void onSuccess(@Nonnull RpcResult<Void> result) {
            if (result.isSuccessful()) {
                LOG.info("onAddFloatingIp : Successfully installed custom FIB routes for Floating " + "IP Prefix {} on DPN {}", externalIp, dpnId);
                List<Instruction> instructions = new ArrayList<>();
                List<ActionInfo> actionsInfos = new ArrayList<>();
                List<Instruction> customInstructions = new ArrayList<>();
                customInstructions.add(new InstructionGotoTable(NwConstants.PDNAT_TABLE).buildInstruction(0));
                actionsInfos.add(new ActionNxResubmit(NwConstants.PDNAT_TABLE));
                instructions.add(new InstructionApplyActions(actionsInfos).buildInstruction(0));
                /* If more than one floatingIp is available in vpn-to-dpn-list for given dpn id, do not call for
                  * installing INTERNAL_TUNNEL_TABLE (table=36) -> PDNAT_TABLE (table=25) flow entry with same tunnel_id
                  * again and again.
                  */
                if (!NatUtil.isFloatingIpPresentForDpn(dataBroker, dpnId, rd, vpnName, externalIp, true)) {
                    makeTunnelTableEntry(dpnId, finalL3Vni, instructions, writeFlowInvTx);
                }
                /* Install the flow L3_GW_MAC_TABLE (table=19)-> PDNAT_TABLE (table=25)
                  * (DNAT reverse traffic: If the traffic is Initiated from DC-GW to FIP VM (DNAT forward traffic))
                  */
                NatEvpnUtil.makeL3GwMacTableEntry(dpnId, vpnId, floatingIpPortMacAddress, customInstructions, mdsalManager, writeFlowInvTx);
                NatUtil.waitForTransactionToComplete(writeFlowInvTx);
            } else {
                LOG.error("onAddFloatingIp : Error {} in rpc call to create custom Fib entries for Floating " + "IP Prefix {} on DPN {}", result.getErrors(), externalIp, dpnId);
            }
        }
    }, MoreExecutors.directExecutor());
    // Read the FIP vpn-interface details from Configuration l3vpn:vpn-interfaces model and write into Operational DS
    InstanceIdentifier<VpnInterface> vpnIfIdentifier = NatUtil.getVpnInterfaceIdentifier(floatingIpInterface);
    Optional<VpnInterface> optionalVpnInterface = SingleTransactionDataBroker.syncReadOptionalAndTreatReadFailedExceptionAsAbsentOptional(dataBroker, LogicalDatastoreType.CONFIGURATION, vpnIfIdentifier);
    if (optionalVpnInterface.isPresent()) {
        WriteTransaction writeOperTxn = dataBroker.newWriteOnlyTransaction();
        for (VpnInstanceNames vpnInstance : optionalVpnInterface.get().getVpnInstanceNames()) {
            if (!vpnName.equals(vpnInstance.getVpnName())) {
                continue;
            }
            VpnInterfaceBuilder vpnIfBuilder = new VpnInterfaceBuilder(optionalVpnInterface.get());
            Adjacencies adjs = vpnIfBuilder.getAugmentation(Adjacencies.class);
            VpnInterfaceOpDataEntryBuilder vpnIfOpDataEntryBuilder = new VpnInterfaceOpDataEntryBuilder();
            vpnIfOpDataEntryBuilder.setKey(new VpnInterfaceOpDataEntryKey(interfaceName, vpnName));
            List<Adjacency> adjacencyList = adjs != null ? adjs.getAdjacency() : new ArrayList<>();
            List<Adjacency> adjacencyListToImport = new ArrayList<>();
            for (Adjacency adj : adjacencyList) {
                Subnetmap sn = VpnHelper.getSubnetmapFromItsUuid(dataBroker, adj.getSubnetId());
                if (!VpnHelper.isSubnetPartOfVpn(sn, vpnName)) {
                    continue;
                }
                adjacencyListToImport.add(adj);
            }
            AdjacenciesOp adjacenciesOp = new AdjacenciesOpBuilder().setAdjacency(adjacencyListToImport).build();
            vpnIfOpDataEntryBuilder.addAugmentation(AdjacenciesOp.class, adjacenciesOp);
            LOG.debug("onAddFloatingIp : Add vpnInterface {} to Operational l3vpn:vpn-interfaces-op-data ", floatingIpInterface);
            InstanceIdentifier<VpnInterfaceOpDataEntry> vpnIfIdentifierOpDataEntry = NatUtil.getVpnInterfaceOpDataEntryIdentifier(interfaceName, vpnName);
            writeOperTxn.put(LogicalDatastoreType.OPERATIONAL, vpnIfIdentifierOpDataEntry, vpnIfOpDataEntryBuilder.build(), WriteTransaction.CREATE_MISSING_PARENTS);
            break;
        }
        ListenableFuture<Void> futures = writeOperTxn.submit();
        String errorText = "onAddFloatingIp : Could not write Interface " + interfaceName + " vpnName " + vpnName;
        ListenableFutures.addErrorLogging(futures, LOG, errorText);
    } else {
        LOG.debug("onAddFloatingIp : No vpnInterface {} found in Configuration l3vpn:vpn-interfaces ", floatingIpInterface);
    }
}