Examples with VpnInstance org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.l3vpn.rev200204.vpn.instances.VpnInstance used on opensource projects

Example 11 with VpnInstance

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.l3vpn.rev200204.vpn.instances.VpnInstance in project netvirt by opendaylight.

the class VpnInterfaceOpListener method postProcessVpnInterfaceRemoval.

private void postProcessVpnInterfaceRemoval(InstanceIdentifier<VpnInterfaceOpDataEntry> identifier, VpnInterfaceOpDataEntry del, @Nullable TypedReadWriteTransaction<Operational> operTx, @Nullable TypedReadTransaction<Configuration> confTx) throws InterruptedException {
    if (confTx == null) {
        txRunner.callWithNewReadOnlyTransactionAndClose(CONFIGURATION, tx -> postProcessVpnInterfaceRemoval(identifier, del, operTx, tx));
        return;
    }
    if (operTx == null) {
        LoggingFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(OPERATIONAL, tx -> postProcessVpnInterfaceRemoval(identifier, del, tx, confTx)), LOG, "Error post-processing VPN interface removal");
        return;
    }
    final VpnInterfaceOpDataEntryKey key = identifier.firstKeyOf(VpnInterfaceOpDataEntry.class);
    String interfaceName = key.getName();
    String vpnName = del.getVpnInstanceName();
    try {
        LOG.info("postProcessVpnInterfaceRemoval: interface name {} vpnName {} dpn {}", interfaceName, vpnName, del.getDpnId());
        // decrement the vpn interface count in Vpn Instance Op Data
        Optional<VpnInstance> vpnInstance = confTx.read(VpnOperDsUtils.getVpnInstanceToVpnIdIdentifier(vpnName)).get();
        if (vpnInstance.isPresent()) {
            String rd = vpnInstance.get().getVrfId();
            VpnInstanceOpDataEntry vpnInstOp = vpnUtil.getVpnInstanceOpData(rd);
            AdjacenciesOp adjs = del.augmentation(AdjacenciesOp.class);
            Map<AdjacencyKey, Adjacency> adjMap = adjs != null ? adjs.getAdjacency() : null;
            if (vpnInstOp != null && adjMap != null && adjMap.size() > 0) {
                /*
                 * When a VPN Interface is removed by FibManager (aka VrfEntryListener and its cohorts),
                 * one adjacency or two adjacency (in case of dual-stack)
                 * for that VPN Interface will be hanging around along with that
                 * VPN Interface.   That adjacency could be primary (or) non-primary.
                 * If its a primary adjacency, then a prefix-to-interface entry will be available for the
                 * same.  If its a non-primary adjacency, then a prefix-to-interface entry will not be
                 * available for the same, instead we will have vpn-to-extraroutes filled in for them.
                 *
                 * Here we try to remove prefix-to-interface entry for pending adjacency in the deleted
                 * vpnInterface.   More importantly, we also update the vpnInstanceOpData by removing this
                 * vpnInterface from it.
                 */
                List<Prefixes> prefixToInterface = new ArrayList<>();
                for (Adjacency adjacency : adjs.getAdjacency().values()) {
                    List<Prefixes> prefixToInterfaceLocal = new ArrayList<>();
                    Optional<Prefixes> prefix = operTx.read(VpnUtil.getPrefixToInterfaceIdentifier(vpnInstOp.getVpnId(), VpnUtil.getIpPrefix(adjacency.getIpAddress()))).get();
                    if (prefix.isPresent()) {
                        prefixToInterfaceLocal.add(prefix.get());
                    }
                    if (prefixToInterfaceLocal.isEmpty() && adjacency.getNextHopIpList() != null) {
                        for (String nh : adjacency.getNextHopIpList()) {
                            prefix = operTx.read(VpnUtil.getPrefixToInterfaceIdentifier(vpnInstOp.getVpnId(), VpnUtil.getIpPrefix(nh))).get();
                            if (prefix.isPresent()) {
                                prefixToInterfaceLocal.add(prefix.get());
                            }
                        }
                    }
                    if (!prefixToInterfaceLocal.isEmpty()) {
                        prefixToInterface.addAll(prefixToInterfaceLocal);
                    }
                }
                /*
                 * In VPN Migration scenarios, there is a race condition where we use the new DPNID
                 * for the migrated VM instead of old DPNID because when we read prefix-to-interface to cleanup
                 * old DPNID, we actually get the new DPNID.
                 *
                 * More dangerously, we tend to alter the new prefix-to-interface which should be retained intac
                 * for the migration to succeed in L3VPN.  As a workaround, here we are going to use the dpnId in
                 * the deleted vpnInterface itself instead of tinkering with the prefix-to-interface.  Further we
                 * will tinker prefix-to-interface only when are damn sure if its value matches our
                 * deleted vpnInterface.
                 *
                 */
                for (Prefixes pref : prefixToInterface) {
                    if (VpnUtil.isMatchedPrefixToInterface(pref, del)) {
                        operTx.delete(VpnUtil.getPrefixToInterfaceIdentifier(vpnInstOp.getVpnId(), pref.getIpAddress()));
                    }
                }
            }
            if (del.getDpnId() != null) {
                vpnFootprintService.updateVpnToDpnMapping(del.getDpnId(), del.getVpnInstanceName(), rd, interfaceName, null, /*ipAddressSourceValuePair*/
                false);
            }
            LOG.info("postProcessVpnInterfaceRemoval: Removed vpn operational data and updated vpn footprint" + " for interface {} on dpn {} vpn {}", interfaceName, del.getDpnId(), vpnName);
        } else {
            LOG.error("postProcessVpnInterfaceRemoval: rd not retrievable as vpninstancetovpnid for vpn {}" + " is absent, trying rd as {}. interface {} dpn {}", vpnName, vpnName, interfaceName, del.getDpnId());
        }
        notifyTaskIfRequired(interfaceName);
    } catch (InterruptedException | ExecutionException e) {
        LOG.error("postProcessVpnInterfaceRemoval: Failed to read data store for interface {} vpn {}", interfaceName, vpnName);
    }
}

Example 12 with VpnInstance

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.l3vpn.rev200204.vpn.instances.VpnInstance in project netvirt by opendaylight.

the class VpnInterfaceManager method processVpnInterfaceUp.

// "Unconditional wait" and "Wait not in loop" wrt the VpnNotifyTask below - suppressing the FB violation -
// see comments below.
@SuppressFBWarnings({ "UW_UNCOND_WAIT", "WA_NOT_IN_LOOP" })
protected void processVpnInterfaceUp(final Uint64 dpId, VpnInterface vpnInterface, final String primaryRd, final int lportTag, boolean isInterfaceUp, TypedWriteTransaction<Configuration> writeConfigTxn, TypedWriteTransaction<Operational> writeOperTxn, TypedReadWriteTransaction<Configuration> writeInvTxn, Interface interfaceState, final String vpnName, Set<String> prefixListForRefreshFib) throws ExecutionException, InterruptedException {
    final String interfaceName = vpnInterface.getName();
    Optional<VpnInterfaceOpDataEntry> optOpVpnInterface = vpnUtil.getVpnInterfaceOpDataEntry(interfaceName, vpnName);
    VpnInterfaceOpDataEntry opVpnInterface = optOpVpnInterface.isPresent() ? optOpVpnInterface.get() : null;
    boolean isBgpVpnInternetVpn = vpnUtil.isBgpVpnInternet(vpnName);
    if (!isInterfaceUp) {
        LOG.info("processVpnInterfaceUp: Binding vpn service to interface {} onto dpn {} for vpn {}", interfaceName, dpId, vpnName);
        Uint32 vpnId = vpnUtil.getVpnId(vpnName);
        if (VpnConstants.INVALID_ID.equals(vpnId)) {
            LOG.warn("processVpnInterfaceUp: VpnInstance to VPNId mapping not available for VpnName {}" + " processing vpninterface {} on dpn {}, bailing out now.", vpnName, interfaceName, dpId);
            return;
        }
        boolean waitForVpnInterfaceOpRemoval = false;
        if (opVpnInterface != null) {
            String opVpnName = opVpnInterface.getVpnInstanceName();
            String primaryInterfaceIp = null;
            if (Objects.equals(opVpnName, vpnName)) {
                // Please check if the primary VRF Entry does not exist for VPNInterface
                // If so, we have to process ADD, as this might be a DPN Restart with Remove and Add triggered
                // back to back
                // However, if the primary VRF Entry for this VPNInterface exists, please continue bailing out !
                List<Adjacency> adjs = vpnUtil.getAdjacenciesForVpnInterfaceFromConfig(interfaceName);
                if (adjs == null) {
                    LOG.error("processVpnInterfaceUp: VPN Interface {} on dpn {} for vpn {} failed as adjacencies" + " for this vpn interface could not be obtained", interfaceName, dpId, vpnName);
                    return;
                }
                for (Adjacency adj : adjs) {
                    if (adj.getAdjacencyType() == AdjacencyType.PrimaryAdjacency) {
                        primaryInterfaceIp = adj.getIpAddress();
                        break;
                    }
                }
                if (primaryInterfaceIp == null) {
                    LOG.error("processVpnInterfaceUp: VPN Interface {} addition on dpn {} for vpn {} failed" + " as primary adjacency for this vpn interface could not be obtained", interfaceName, dpId, vpnName);
                    return;
                }
                // Get the rd of the vpn instance
                VrfEntry vrf = vpnUtil.getVrfEntry(primaryRd, primaryInterfaceIp);
                if (vrf != null) {
                    LOG.error("processVpnInterfaceUp: VPN Interface {} on dpn {} for vpn {} already provisioned ," + " bailing out from here.", interfaceName, dpId, vpnName);
                    return;
                }
                waitForVpnInterfaceOpRemoval = true;
            } else {
                LOG.error("processVpnInterfaceUp: vpn interface {} to go to configured vpn {} on dpn {}," + " but in operational vpn {}", interfaceName, vpnName, dpId, opVpnName);
            }
        }
        if (!waitForVpnInterfaceOpRemoval) {
            // Add the VPNInterface and quit
            vpnFootprintService.updateVpnToDpnMapping(dpId, vpnName, primaryRd, interfaceName, null, /*ipAddressSourceValuePair*/
            true);
            processVpnInterfaceAdjacencies(dpId, lportTag, vpnName, primaryRd, interfaceName, vpnId, writeConfigTxn, writeOperTxn, writeInvTxn, interfaceState, prefixListForRefreshFib);
            if (!isBgpVpnInternetVpn) {
                vpnUtil.bindService(vpnName, interfaceName, false);
            }
            LOG.info("processVpnInterfaceUp: Plumbed vpn interface {} onto dpn {} for vpn {}", interfaceName, dpId, vpnName);
            if (interfaceManager.isExternalInterface(interfaceName)) {
                processExternalVpnInterface(interfaceName, vpnName, dpId, lportTag, NwConstants.ADD_FLOW);
            }
            return;
        }
        // FIB didn't get a chance yet to clean up this VPNInterface
        // Let us give it a chance here !
        LOG.info("processVpnInterfaceUp: Trying to add VPN Interface {} on dpn {} for vpn {}," + " but waiting for FIB to clean up! ", interfaceName, dpId, vpnName);
        try {
            Runnable notifyTask = new VpnNotifyTask();
            synchronized (notifyTask) {
                // Per FB's "Unconditional wait" violation, the code should really verify that the condition it
                // intends to wait for is not already satisfied before calling wait. However the VpnNotifyTask is
                // published here while holding the lock on it so this path will hit the wait before notify can be
                // invoked.
                vpnIntfMap.put(interfaceName, notifyTask);
                try {
                    notifyTask.wait(VpnConstants.MAX_WAIT_TIME_IN_MILLISECONDS);
                } catch (InterruptedException e) {
                // Ignored
                }
            }
        } finally {
            vpnIntfMap.remove(interfaceName);
        }
        if (opVpnInterface != null) {
            LOG.warn("processVpnInterfaceUp: VPN Interface {} removal on dpn {} for vpn {}" + " by FIB did not complete on time," + " bailing addition ...", interfaceName, dpId, vpnName);
            vpnUtil.unsetScheduledToRemoveForVpnInterface(interfaceName);
            return;
        }
        // VPNInterface got removed, proceed with Add
        LOG.info("processVpnInterfaceUp: Continuing to plumb vpn interface {} onto dpn {} for vpn {}", interfaceName, dpId, vpnName);
        vpnFootprintService.updateVpnToDpnMapping(dpId, vpnName, primaryRd, interfaceName, null, /*ipAddressSourceValuePair*/
        true);
        processVpnInterfaceAdjacencies(dpId, lportTag, vpnName, primaryRd, interfaceName, vpnId, writeConfigTxn, writeOperTxn, writeInvTxn, interfaceState, prefixListForRefreshFib);
        if (!isBgpVpnInternetVpn) {
            vpnUtil.bindService(vpnName, interfaceName, false);
        }
        LOG.info("processVpnInterfaceUp: Plumbed vpn interface {} onto dpn {} for vpn {} after waiting for" + " FIB to clean up", interfaceName, dpId, vpnName);
        if (interfaceManager.isExternalInterface(interfaceName)) {
            processExternalVpnInterface(interfaceName, vpnName, dpId, lportTag, NwConstants.ADD_FLOW);
        }
    } else {
        try {
            // Interface is retained in the DPN, but its Link Up.
            // Advertise prefixes again for this interface to BGP
            InstanceIdentifier<VpnInterface> identifier = VpnUtil.getVpnInterfaceIdentifier(vpnInterface.getName());
            InstanceIdentifier<VpnInterfaceOpDataEntry> vpnInterfaceOpIdentifier = VpnUtil.getVpnInterfaceOpDataEntryIdentifier(interfaceName, vpnName);
            advertiseAdjacenciesForVpnToBgp(primaryRd, dpId, vpnInterfaceOpIdentifier, vpnName, interfaceName);
            // Perform similar operation as interface add event for extraroutes.
            InstanceIdentifier<Adjacencies> path = identifier.augmentation(Adjacencies.class);
            Optional<Adjacencies> optAdjacencies = SingleTransactionDataBroker.syncReadOptional(dataBroker, LogicalDatastoreType.CONFIGURATION, path);
            if (!optAdjacencies.isPresent()) {
                LOG.trace("No config adjacencyKeyAdjacencyMap present for vpninterface {}", vpnInterface);
                return;
            }
            Map<AdjacencyKey, Adjacency> adjacencyKeyAdjacencyMap = optAdjacencies.get().nonnullAdjacency();
            for (Adjacency adjacency : adjacencyKeyAdjacencyMap.values()) {
                if (adjacency.getAdjacencyType() == AdjacencyType.PrimaryAdjacency) {
                    continue;
                }
                // if BGPVPN Internet, filter only IPv6 Adjacencies
                if (isBgpVpnInternetVpn && !vpnUtil.isAdjacencyEligibleToVpnInternet(adjacency)) {
                    continue;
                }
                addNewAdjToVpnInterface(vpnInterfaceOpIdentifier, primaryRd, adjacency, dpId, writeOperTxn, writeConfigTxn, writeInvTxn, prefixListForRefreshFib);
            }
        } catch (InterruptedException | ExecutionException e) {
            LOG.error("processVpnInterfaceUp: Failed to read data store for interface {} vpn {} rd {} dpn {}", interfaceName, vpnName, primaryRd, dpId);
        }
    }
}

Example 13 with VpnInstance

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.l3vpn.rev200204.vpn.instances.VpnInstance in project netvirt by opendaylight.

the class TunnelEndPointChangeListener method add.

@Override
public void add(InstanceIdentifier<TunnelEndPoints> key, TunnelEndPoints tep) {
    Uint64 dpnId = key.firstIdentifierOf(DPNTEPsInfo.class).firstKeyOf(DPNTEPsInfo.class).getDPNID();
    if (Uint64.ZERO.equals(dpnId)) {
        LOG.warn("add: Invalid DPN id for TEP {}", tep.getInterfaceName());
        return;
    }
    List<VpnInstance> vpnInstances = VpnHelper.getAllVpnInstances(broker);
    if (vpnInstances == null || vpnInstances.isEmpty()) {
        LOG.warn("add: dpnId: {}: tep: {}: No VPN instances defined", dpnId, tep.getInterfaceName());
        return;
    }
    for (VpnInstance vpnInstance : vpnInstances) {
        final String vpnName = vpnInstance.getVpnInstanceName();
        final Uint32 vpnId = vpnUtil.getVpnId(vpnName);
        LOG.info("add: Handling TEP {} add for VPN instance {}", tep.getInterfaceName(), vpnName);
        final String primaryRd = vpnUtil.getPrimaryRd(vpnName);
        if (!vpnUtil.isVpnPendingDelete(primaryRd)) {
            List<VpnInterfaces> vpnInterfaces = vpnUtil.getDpnVpnInterfaces(vpnInstance, dpnId);
            if (vpnInterfaces != null) {
                for (VpnInterfaces vpnInterface : vpnInterfaces) {
                    String vpnInterfaceName = vpnInterface.getInterfaceName();
                    jobCoordinator.enqueueJob("VPNINTERFACE-" + vpnInterfaceName, () -> {
                        final org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.interfaces.rev140508.interfaces.state.Interface interfaceState = InterfaceUtils.getInterfaceStateFromOperDS(broker, vpnInterfaceName);
                        if (interfaceState == null) {
                            LOG.debug("add: Cannot retrieve interfaceState for vpnInterfaceName {}, " + "cannot generate lPortTag and process adjacencies", vpnInterfaceName);
                            return Collections.emptyList();
                        }
                        final int lPortTag = interfaceState.getIfIndex();
                        List<ListenableFuture<?>> futures = new ArrayList<>();
                        Set<String> prefixesForRefreshFib = new HashSet<>();
                        ListenableFuture<?> writeConfigFuture = txRunner.callWithNewWriteOnlyTransactionAndSubmit(CONFIGURATION, writeConfigTxn -> futures.add(txRunner.callWithNewWriteOnlyTransactionAndSubmit(OPERATIONAL, writeOperTxn -> futures.add(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, writeInvTxn -> vpnInterfaceManager.processVpnInterfaceAdjacencies(dpnId, lPortTag, vpnName, primaryRd, vpnInterfaceName, vpnId, writeConfigTxn, writeOperTxn, writeInvTxn, interfaceState, prefixesForRefreshFib))))));
                        Futures.addCallback(writeConfigFuture, new FutureCallback<Object>() {

                            @Override
                            public void onSuccess(Object voidObj) {
                                prefixesForRefreshFib.forEach(prefix -> {
                                    fibManager.refreshVrfEntry(primaryRd, prefix);
                                });
                            }

                            @Override
                            public void onFailure(Throwable throwable) {
                                LOG.debug("addVpnInterface: write Tx config execution failed", throwable);
                            }
                        }, MoreExecutors.directExecutor());
                        futures.add(writeConfigFuture);
                        LOG.trace("add: Handled TEP {} add for VPN instance {} VPN interface {}", tep.getInterfaceName(), vpnName, vpnInterfaceName);
                        return futures;
                    });
                }
            }
        } else {
            LOG.error("add: Ignoring addition of tunnel interface {} dpn {} for vpnInstance {} with primaryRd {}," + " as the VPN is already marked for deletion", tep.getInterfaceName(), dpnId, vpnName, primaryRd);
        }
    }
}

Example 14 with VpnInstance

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.l3vpn.rev200204.vpn.instances.VpnInstance in project netvirt by opendaylight.

the class VpnElanInterfaceChangeListener method add.

@Override
public void add(InstanceIdentifier<ElanInterface> key, ElanInterface elanInterface) {
    String interfaceName = elanInterface.getName();
    if (!elanService.isExternalInterface(interfaceName)) {
        LOG.debug("add: Interface {} is not external. Ignoring", interfaceName);
        return;
    }
    Uuid networkId;
    try {
        networkId = new Uuid(elanInterface.getElanInstanceName());
    } catch (IllegalArgumentException e) {
        LOG.debug("add: ELAN instance {} for interface {} is not Uuid", elanInterface.getElanInstanceName(), elanInterface.getName());
        return;
    }
    Uuid vpnId = vpnUtil.getExternalNetworkVpnId(networkId);
    if (vpnId == null) {
        LOG.debug("add: Network {} is not external or vpn-id missing. Ignoring interface {} on elan {}", networkId.getValue(), elanInterface.getName(), elanInterface.getElanInstanceName());
        return;
    }
    VpnInstanceNames vpnInstance = VpnHelper.getVpnInterfaceVpnInstanceNames(vpnId.getValue(), AssociatedSubnetType.V4AndV6Subnets);
    List<VpnInstanceNames> listVpn = new ArrayList<>();
    listVpn.add(vpnInstance);
    VpnInterface vpnInterface = new VpnInterfaceBuilder().withKey(new VpnInterfaceKey(interfaceName)).setVpnInstanceNames(listVpn).build();
    InstanceIdentifier<VpnInterface> vpnInterfaceIdentifier = VpnUtil.getVpnInterfaceIdentifier(interfaceName);
    vpnUtil.syncWrite(LogicalDatastoreType.CONFIGURATION, vpnInterfaceIdentifier, vpnInterface);
    LOG.info("add: Added VPN interface {} with VPN-id {} elanInstance {}", interfaceName, vpnId.getValue(), elanInterface.getElanInstanceName());
}

Example 15 with VpnInstance

use of org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.neutronvpn.l3vpn.rev200204.vpn.instances.VpnInstance in project netvirt by opendaylight.

the class InterfaceStateChangeListener method update.

// TODO Clean up the exception handling
@SuppressWarnings("checkstyle:IllegalCatch")
@Override
public void update(InstanceIdentifier<Interface> identifier, Interface original, Interface update) {
    final String ifName = update.getName();
    try {
        if (update.getIfIndex() == null) {
            return;
        }
        if (L2vlan.class.equals(update.getType())) {
            LOG.info("VPN Interface update event - intfName {} from InterfaceStateChangeListener", update.getName());
            jobCoordinator.enqueueJob("VPNINTERFACE-" + ifName, () -> {
                List<ListenableFuture<?>> futures = new ArrayList<>(3);
                futures.add(txRunner.callWithNewWriteOnlyTransactionAndSubmit(OPERATIONAL, writeOperTxn -> {
                    // map of prefix and vpn name used, as entry in prefix-to-interface datastore
                    // is prerequisite for refresh Fib to avoid race condition leading to missing remote
                    // next hop in bucket actions on bgp-vpn delete
                    Map<String, Set<String>> mapOfRdAndPrefixesForRefreshFib = new HashMap<>();
                    ListenableFuture<?> configTxFuture = txRunner.callWithNewWriteOnlyTransactionAndSubmit(CONFIGURATION, writeConfigTxn -> futures.add(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, writeInvTxn -> {
                        final VpnInterface vpnIf = vpnUtil.getConfiguredVpnInterface(ifName);
                        if (vpnIf != null) {
                            final int ifIndex = update.getIfIndex();
                            Uint64 dpnId;
                            try {
                                dpnId = InterfaceUtils.getDpIdFromInterface(update);
                            } catch (Exception e) {
                                LOG.error("remove: Unable to retrieve dpnId for interface {}", ifName, e);
                                return;
                            }
                            IntfTransitionState state = getTransitionState(original.getOperStatus(), update.getOperStatus());
                            if (state.equals(IntfTransitionState.STATE_IGNORE)) {
                                LOG.info("InterfaceStateChangeListener: Interface {} state " + "original {}" + "updated {} not handled", ifName, original.getOperStatus(), update.getOperStatus());
                                return;
                            }
                            LOG.error("InterfaceStateChangeListener- Processing ifState {} " + "update event " + "with dpnId {} operstate {}", ifName, dpnId, update.getOperStatus());
                            if (state.equals(IntfTransitionState.STATE_UP) && vpnIf.getVpnInstanceNames() != null) {
                                for (VpnInstanceNames vpnInterfaceVpnInstance : vpnIf.getVpnInstanceNames().values()) {
                                    String vpnName = vpnInterfaceVpnInstance.getVpnName();
                                    String primaryRd = vpnUtil.getPrimaryRd(vpnName);
                                    Set<String> prefixes = new HashSet<>();
                                    if (!vpnInterfaceManager.isVpnInstanceReady(vpnName)) {
                                        LOG.error("VPN Interface update event - intfName {} " + "onto vpnName {} running oper-driven UP, " + "VpnInstance not ready, holding on", vpnIf.getName(), vpnName);
                                    } else if (vpnUtil.isVpnPendingDelete(primaryRd)) {
                                        LOG.error("update: Ignoring UP event for vpnInterface " + "{}, as vpnInstance {} with primaryRd {} is " + "already marked for deletion ", vpnIf.getName(), vpnName, primaryRd);
                                    } else {
                                        vpnInterfaceManager.processVpnInterfaceUp(dpnId, vpnIf, primaryRd, ifIndex, true, writeConfigTxn, writeOperTxn, writeInvTxn, update, vpnName, prefixes);
                                        mapOfRdAndPrefixesForRefreshFib.put(primaryRd, prefixes);
                                    }
                                }
                            } else if (state.equals(IntfTransitionState.STATE_DOWN) && vpnIf.getVpnInstanceNames() != null) {
                                for (VpnInstanceNames vpnInterfaceVpnInstance : vpnIf.getVpnInstanceNames().values()) {
                                    String vpnName = vpnInterfaceVpnInstance.getVpnName();
                                    LOG.info("VPN Interface update event - intfName {} " + " onto vpnName {} running oper-driven DOWN", vpnIf.getName(), vpnName);
                                    Optional<VpnInterfaceOpDataEntry> optVpnInterface = vpnUtil.getVpnInterfaceOpDataEntry(vpnIf.getName(), vpnName);
                                    if (optVpnInterface.isPresent()) {
                                        VpnInterfaceOpDataEntry vpnOpInterface = optVpnInterface.get();
                                        vpnInterfaceManager.processVpnInterfaceDown(dpnId, vpnIf.getName(), ifIndex, update.getPhysAddress().getValue(), vpnOpInterface, true, writeConfigTxn, writeOperTxn, writeInvTxn);
                                    } else {
                                        LOG.error("InterfaceStateChangeListener Update DOWN - " + " vpnInterface {}not available, ignoring event", vpnIf.getName());
                                        continue;
                                    }
                                }
                            }
                        } else {
                            LOG.debug("Interface {} is not a vpninterface, ignoring.", ifName);
                        }
                    })));
                    Futures.addCallback(configTxFuture, new VpnInterfaceCallBackHandler(mapOfRdAndPrefixesForRefreshFib), MoreExecutors.directExecutor());
                    futures.add(configTxFuture);
                }));
                return futures;
            });
        }
    } catch (Exception e) {
        LOG.error("Exception observed in handling updation of VPN Interface {}. ", update.getName(), e);
    }
}