Examples with Address org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces.state._interface.ipv4.Address used on opensource projects

Example 86 with Address

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces.state._interface.ipv4.Address 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 87 with Address

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces.state._interface.ipv4.Address 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 88 with Address

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces.state._interface.ipv4.Address in project netvirt by opendaylight.

the class Ipv6PktHandlerTest method testonPacketReceivedRouterSolicitationWithMultipleSubnets.

@Test
public void testonPacketReceivedRouterSolicitationWithMultipleSubnets() throws Exception {
    VirtualPort intf = Mockito.mock(VirtualPort.class);
    when(intf.getMacAddress()).thenReturn("50:7B:9D:78:54:F3");
    when(ifMgrInstance.obtainV6Interface(any())).thenReturn(intf);
    when(ifMgrInstance.getInterfaceNameFromTag(anyLong())).thenReturn("ddec9dba-d831-4ad7-84b9-00d7f65f052f");
    when(ifMgrInstance.getRouterV6InterfaceForNetwork(any())).thenReturn(intf);
    IpAddress gwIpAddress = Mockito.mock(IpAddress.class);
    when(gwIpAddress.getIpv4Address()).thenReturn(null);
    when(gwIpAddress.getIpv6Address()).thenReturn(new Ipv6Address("2001:db8:1111::1"));
    VirtualSubnet v6Subnet1 = VirtualSubnet.builder().gatewayIp(gwIpAddress).subnetCidr(new IpPrefix("2001:db8:1111::/64".toCharArray())).ipv6AddressMode(Ipv6Constants.IPV6_SLAAC).ipv6RAMode(Ipv6Constants.IPV6_SLAAC).build();
    VirtualRouter virtualRouter = VirtualRouter.builder().build();
    v6Subnet1.setRouter(virtualRouter);
    VirtualSubnet v6Subnet2 = VirtualSubnet.builder().gatewayIp(gwIpAddress).subnetCidr(new IpPrefix("2001:db8:2222::/64".toCharArray())).ipv6AddressMode(Ipv6Constants.IPV6_DHCPV6_STATELESS).ipv6RAMode(Ipv6Constants.IPV6_DHCPV6_STATELESS).build();
    v6Subnet2.setRouter(virtualRouter);
    VirtualSubnet v6Subnet3 = VirtualSubnet.builder().gatewayIp(gwIpAddress).subnetCidr(new IpPrefix("2001:db8:3333::/64".toCharArray())).ipv6AddressMode(Ipv6Constants.IPV6_DHCPV6_STATEFUL).ipv6RAMode(Ipv6Constants.IPV6_DHCPV6_STATEFUL).build();
    v6Subnet3.setRouter(virtualRouter);
    List<VirtualSubnet> subnetList = new ArrayList<>();
    subnetList.add(v6Subnet1);
    subnetList.add(v6Subnet2);
    subnetList.add(v6Subnet3);
    when(intf.getSubnets()).thenReturn(subnetList);
    InstanceIdentifier<Node> ncId = InstanceIdentifier.builder(Nodes.class).child(Node.class, new NodeKey(new NodeId("openflow:1"))).build();
    NodeConnectorRef ncRef = new NodeConnectorRef(ncId);
    BigInteger mdata = new BigInteger(String.valueOf(0x1000000));
    Metadata metadata = new MetadataBuilder().setMetadata(mdata).build();
    MatchBuilder matchbuilder = new MatchBuilder().setMetadata(metadata);
    pktHandler.onPacketReceived(new PacketReceivedBuilder().setPayload(ipv6TestUtils.buildPacket(// Destination MAC
    "33 33 00 00 00 02", // Source MAC
    "FA 16 3E 69 2C F3", // IPv6
    "86 DD", // Version 6, traffic class E0, no flowlabel
    "60 00 00 00", // Payload length
    "00 10", // Next header is ICMPv6
    "3A", // Hop limit
    "FF", // Source IP
    "FE 80 00 00 00 00 00 00 F8 16 3E FF FE 69 2C F3", // Destination IP
    "FF 02 00 00 00 00 00 00 00 00 00 00 00 00 00 02", // ICMPv6 router solicitation
    "85", // Code
    "00", // Checksum (valid)
    "B4 47", // ICMPv6 message body
    "00 00 00 00", // ICMPv6 Option: Source Link Layer Address
    "01", // Length
    "01", // Link Layer Address
    "FA 16 3E 69 2C F3")).setIngress(ncRef).setMatch(matchbuilder.build()).build());
    // wait on this thread until the async job is completed in the packet handler.
    waitForPacketProcessing();
    verify(pktProcessService, times(1)).transmitPacket(any(TransmitPacketInput.class));
    byte[] expectedPayload = ipv6TestUtils.buildPacket(// Destination MAC
    "FA 16 3E 69 2C F3", // Source MAC
    "50 7B 9D 78 54 F3", // IPv6
    "86 DD", // Version 6, traffic class E0, no flowlabel
    "60 00 00 00", // Payload length
    "00 78", // Next header is ICMPv6
    "3A", // Hop limit
    "FF", // Source IP
    "FE 80 00 00 00 00 00 00 52 7B 9D FF FE 78 54 F3", // Destination IP
    "FE 80 00 00 00 00 00 00 F8 16 3E FF FE 69 2C F3", // ICMPv6 router advertisement.
    "86", // Code
    "00", // Checksum (valid)
    "59 41", // Current Hop Limit
    "40", // ICMPv6 RA Flags
    "C0", // Router Lifetime
    "11 94", // Reachable time
    "00 01 D4 C0", // Retransmission time.
    "00 00 00 00", // Type: Source Link-Layer Option
    "01", // Option length
    "01", // Source Link layer address
    "50 7B 9D 78 54 F3", // Type: Prefix Information
    "03", // Option length
    "04", // Prefix length
    "40", // Prefix flags
    "C0", // Valid lifetime
    "00 27 8D 00", // Preferred lifetime
    "00 09 3A 80", // Reserved
    "00 00 00 00", // Prefix
    "20 01 0D B8 11 11 00 00 00 00 00 00 00 00 00 00", // Type: Prefix Information
    "03", // Option length
    "04", // Prefix length
    "40", // Prefix flags
    "C0", // Valid lifetime
    "00 27 8D 00", // Preferred lifetime
    "00 09 3A 80", // Reserved
    "00 00 00 00", // Prefix
    "20 01 0D B8 22 22 00 00 00 00 00 00 00 00 00 00", // Type: Prefix Information
    "03", // Option length
    "04", // Prefix length
    "40", // Prefix flags
    "80", // Valid lifetime
    "00 27 8D 00", // Preferred lifetime
    "00 09 3A 80", // Reserved
    "00 00 00 00", // Prefix
    "20 01 0D B8 33 33 00 00 00 00 00 00 00 00 00 00");
    verify(pktProcessService).transmitPacket(new TransmitPacketInputBuilder().setPayload(expectedPayload).setNode(new NodeRef(ncId)).setEgress(ncRef).build());
}

Example 89 with Address

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces.state._interface.ipv4.Address in project netvirt by opendaylight.

the class Ipv6PktHandlerTest method testonPacketReceivedRouterSolicitationWithInvalidPayload.

@Test
public void testonPacketReceivedRouterSolicitationWithInvalidPayload() throws Exception {
    // incorrect checksum in Router Solicitation
    pktHandler.onPacketReceived(new PacketReceivedBuilder().setPayload(ipv6TestUtils.buildPacket(// Destination MAC
    "33 33 FF F5 00 00", // Source MAC
    "00 01 02 03 04 05", // IPv6
    "86 DD", // Version 6, traffic class E0, no flowlabel
    "6E 00 00 00", // Payload length
    "00 18", // Next header is ICMPv6
    "3A", // Hop limit
    "FF", // Source IP
    "00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00", // Destination IP
    "FF 02 00 00 00 00 00 00 00 00 00 01 FF F5 00 00", // ICMPv6 router solicitation
    "85", // Code
    "00", // Checksum (invalid, should be 67 3C)
    "69 3E", // ICMPv6 message body
    "00 00 00 00", // Target
    "FE 80 00 00 00 00 00 00 C0 00 54 FF FE F5 00 00")).build());
    // wait on this thread until the async job is completed in the packet handler.
    waitForPacketProcessing();
    verify(pktProcessService, times(0)).transmitPacket(any(TransmitPacketInput.class));
    // Request from an unknown port (i.e., unknown MAC Address)
    when(ifMgrInstance.obtainV6Interface(any())).thenReturn(null);
    counter = pktHandler.getPacketProcessedCounter();
    pktHandler.onPacketReceived(new PacketReceivedBuilder().setPayload(ipv6TestUtils.buildPacket(// Destination MAC
    "33 33 FF F5 00 00", // Source MAC
    "00 01 02 03 04 05", // IPv6
    "86 DD", // Version 6, traffic class E0, no flowlabel
    "6E 00 00 00", // Payload length
    "00 18", // Next header is ICMPv6
    "3A", // Hop limit
    "FF", // Source IP
    "00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00", // Destination IP
    "FF 02 00 00 00 00 00 00 00 00 00 01 FF F5 00 00", // ICMPv6 router solicitation
    "85", // Code
    "00", // Checksum (valid)
    "69 3C", // ICMPv6 message body
    "00 00 00 00", // Target
    "FE 80 00 00 00 00 00 00 C0 00 54 FF FE F5 00 00")).build());
    // wait on this thread until the async job is completed in the packet handler.
    waitForPacketProcessing();
    verify(pktProcessService, times(0)).transmitPacket(any(TransmitPacketInput.class));
}

Example 90 with Address

use of org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.ip.rev140616.interfaces.state._interface.ipv4.Address in project netvirt by opendaylight.

the class NexthopManager method createLocalNextHop.

public long createLocalNextHop(long vpnId, BigInteger dpnId, String ifName, String ipNextHopAddress, String ipPrefixAddress, String gwMacAddress, String jobKey) {
    String vpnName = fibUtil.getVpnNameFromId(vpnId);
    if (vpnName == null) {
        return 0;
    }
    String macAddress = fibUtil.getMacAddressFromPrefix(ifName, vpnName, ipPrefixAddress);
    String ipAddress = macAddress != null ? ipPrefixAddress : ipNextHopAddress;
    long groupId = createNextHopPointer(getNextHopKey(vpnId, ipAddress));
    if (groupId == 0) {
        LOG.error("Unable to allocate groupId for vpnId {} , prefix {}  IntfName {}, nextHopAddr {}", vpnId, ipAddress, ifName, ipNextHopAddress);
        return groupId;
    }
    String nextHopLockStr = vpnId + ipAddress;
    jobCoordinator.enqueueJob(jobKey, () -> {
        synchronized (nextHopLockStr.intern()) {
            VpnNexthop nexthop = getVpnNexthop(vpnId, ipAddress);
            LOG.trace("nexthop: {} retrieved for vpnId {}, prefix {}, ifName {} on dpn {}", nexthop, vpnId, ipAddress, ifName, dpnId);
            if (nexthop == null) {
                String encMacAddress = macAddress == null ? fibUtil.getMacAddressFromPrefix(ifName, vpnName, ipAddress) : macAddress;
                List<BucketInfo> listBucketInfo = new ArrayList<>();
                List<ActionInfo> listActionInfo = new ArrayList<>();
                int actionKey = 0;
                // MAC re-write
                if (encMacAddress != null) {
                    if (gwMacAddress != null) {
                        LOG.trace("The Local NextHop Group Source Mac {} for VpnInterface {} on VPN {}", gwMacAddress, ifName, vpnId);
                        listActionInfo.add(new ActionSetFieldEthernetSource(actionKey++, new MacAddress(gwMacAddress)));
                    }
                    listActionInfo.add(new ActionSetFieldEthernetDestination(actionKey++, new MacAddress(encMacAddress)));
                // listActionInfo.add(0, new ActionPopMpls());
                } else {
                    // FIXME: Log message here.
                    LOG.debug("mac address for new local nexthop is null");
                }
                listActionInfo.addAll(getEgressActionsForInterface(ifName, actionKey));
                BucketInfo bucket = new BucketInfo(listActionInfo);
                listBucketInfo.add(bucket);
                GroupEntity groupEntity = MDSALUtil.buildGroupEntity(dpnId, groupId, ipAddress, GroupTypes.GroupAll, listBucketInfo);
                LOG.trace("Install LNH Group: id {}, mac address {}, interface {} for prefix {}", groupId, encMacAddress, ifName, ipAddress);
                // Try to install group directly on the DPN bypassing the FRM, in order to avoid waiting for the
                // group to get installed before programming the flows
                installGroupOnDpn(groupId, dpnId, ipAddress, listBucketInfo, getNextHopKey(vpnId, ipAddress), GroupTypes.GroupAll);
                // install Group
                mdsalApiManager.syncInstallGroup(groupEntity);
                // update MD-SAL DS
                addVpnNexthopToDS(dpnId, vpnId, ipAddress, groupId);
            } else {
                // nexthop exists already; a new flow is going to point to
                // it, increment the flowrefCount by 1
                int flowrefCnt = nexthop.getFlowrefCount() + 1;
                VpnNexthop nh = new VpnNexthopBuilder().setKey(new VpnNexthopKey(ipAddress)).setFlowrefCount(flowrefCnt).build();
                LOG.trace("Updating vpnnextHop {} for refCount {} to Operational DS", nh, flowrefCnt);
                MDSALUtil.syncUpdate(dataBroker, LogicalDatastoreType.OPERATIONAL, getVpnNextHopIdentifier(vpnId, ipAddress), nh);
            }
        }
        return Collections.emptyList();
    });
    return groupId;
}