2 * Copyright (c) 2017 HPE and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netvirt.elan.utils;
10 import com.google.common.base.Optional;
11 import com.google.common.collect.MapDifference;
12 import com.google.common.collect.MapDifference.ValueDifference;
13 import com.google.common.collect.Maps;
14 import java.math.BigInteger;
15 import java.util.ArrayList;
16 import java.util.Collections;
17 import java.util.HashSet;
18 import java.util.List;
20 import java.util.Map.Entry;
22 import java.util.stream.Collectors;
23 import javax.annotation.Nonnull;
24 import javax.annotation.Nullable;
25 import javax.inject.Inject;
26 import javax.inject.Singleton;
27 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
28 import org.opendaylight.controller.md.sal.binding.api.ReadTransaction;
29 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
30 import org.opendaylight.controller.md.sal.binding.api.WriteTransaction;
31 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
32 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
33 import org.opendaylight.genius.infra.ManagedNewTransactionRunner;
34 import org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl;
35 import org.opendaylight.infrautils.utils.concurrent.ListenableFutures;
36 import org.opendaylight.netvirt.elan.cache.ElanInstanceCache;
37 import org.opendaylight.netvirt.elan.internal.ElanBridgeManager;
38 import org.opendaylight.netvirt.elanmanager.api.IElanService;
39 import org.opendaylight.ovsdb.utils.mdsal.utils.MdsalUtils;
40 import org.opendaylight.ovsdb.utils.southbound.utils.SouthboundUtils;
41 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
42 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
43 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406.BridgeRefInfo;
44 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406.bridge.ref.info.BridgeRefEntry;
45 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406.bridge.ref.info.BridgeRefEntryKey;
46 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.rev160406.TunnelTypeVxlan;
47 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.DpnEndpoints;
48 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.DPNTEPsInfo;
49 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.DPNTEPsInfoKey;
50 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.dpn.teps.info.TunnelEndPoints;
51 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.op.rev160406.dpn.endpoints.dpn.teps.info.tunnel.end.points.TzMembership;
52 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.TransportZones;
53 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.TransportZone;
54 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.TransportZoneBuilder;
55 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.TransportZoneKey;
56 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.transport.zone.Subnets;
57 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.transport.zone.SubnetsBuilder;
58 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.transport.zone.SubnetsKey;
59 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.transport.zone.subnets.Vteps;
60 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.transport.zone.subnets.VtepsBuilder;
61 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.itm.rev160406.transport.zones.transport.zone.subnets.VtepsKey;
62 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.config.rev150710.ElanConfig;
63 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.interfaces.ElanInterface;
64 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.vpn.instance.op.data.vpn.instance.op.data.entry.vpn.to.dpn.list.VpnInterfaces;
65 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
66 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
67 import org.slf4j.Logger;
68 import org.slf4j.LoggerFactory;
71 public class TransportZoneNotificationUtil {
72 private static final Logger LOG = LoggerFactory.getLogger(TransportZoneNotificationUtil.class);
73 private static final String TUNNEL_PORT = "tunnel_port";
74 private static final String LOCAL_IP = "local_ip";
75 private static final String LOCAL_IPS = "local_ips";
76 private static final char IP_NETWORK_ZONE_NAME_DELIMITER = '-';
77 private static final String ALL_SUBNETS_GW = "0.0.0.0";
78 private static final String ALL_SUBNETS = "0.0.0.0/0";
79 private final ManagedNewTransactionRunner txRunner;
80 private final SouthboundUtils southBoundUtils;
81 private final IElanService elanService;
82 private final ElanConfig elanConfig;
83 private final ElanBridgeManager elanBridgeManager;
84 private final ElanInstanceCache elanInstanceCache;
87 public TransportZoneNotificationUtil(final DataBroker dbx,
88 final IElanService elanService, final ElanConfig elanConfig, final ElanBridgeManager elanBridgeManager,
89 final ElanInstanceCache elanInstanceCache) {
90 this.txRunner = new ManagedNewTransactionRunnerImpl(dbx);
91 this.elanService = elanService;
92 this.elanConfig = elanConfig;
93 this.elanBridgeManager = elanBridgeManager;
94 this.elanInstanceCache = elanInstanceCache;
95 southBoundUtils = new SouthboundUtils(new MdsalUtils(dbx));
98 public boolean shouldCreateVtep(List<VpnInterfaces> vpnInterfaces) {
99 if (vpnInterfaces == null || vpnInterfaces.isEmpty()) {
103 for (VpnInterfaces vpnInterface : vpnInterfaces) {
104 String interfaceName = vpnInterface.getInterfaceName();
106 ElanInterface elanInt = elanService.getElanInterfaceByElanInterfaceName(interfaceName);
107 if (elanInt == null) {
111 if (ElanUtils.isVxlanNetworkOrVxlanSegment(
112 elanInstanceCache.get(elanInt.getElanInstanceName()).orNull())) {
115 LOG.debug("Non-VXLAN elanInstance: {}", elanInt.getElanInstanceName());
122 private TransportZone createZone(String subnetIp, String zoneName) {
123 List<Subnets> subnets = new ArrayList<>();
124 subnets.add(buildSubnets(subnetIp));
125 TransportZoneBuilder tzb = new TransportZoneBuilder().withKey(new TransportZoneKey(zoneName))
126 .setTunnelType(TunnelTypeVxlan.class).setZoneName(zoneName).setSubnets(subnets);
130 private void updateTransportZone(TransportZone zone, BigInteger dpnId, @Nonnull WriteTransaction tx) {
131 InstanceIdentifier<TransportZone> path = InstanceIdentifier.builder(TransportZones.class)
132 .child(TransportZone.class, new TransportZoneKey(zone.getZoneName())).build();
134 tx.merge(LogicalDatastoreType.CONFIGURATION, path, zone);
135 LOG.info("Transport zone {} updated due to dpn {} handling.", zone.getZoneName(), dpnId);
138 public void updateTransportZone(String zoneNamePrefix, BigInteger dpnId) {
139 ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(tx -> {
140 Map<String, String> localIps = getDpnLocalIps(dpnId, tx);
141 if (!localIps.isEmpty()) {
142 LOG.debug("Will use local_ips for transport zone update for dpn {} and zone name prefix {}", dpnId,
144 for (Entry<String, String> entry : localIps.entrySet()) {
145 String localIp = entry.getKey();
146 String underlayNetworkName = entry.getValue();
147 String zoneName = getTzNameForUnderlayNetwork(zoneNamePrefix, underlayNetworkName);
148 updateTransportZone(zoneName, dpnId, localIp, tx);
151 updateTransportZone(zoneNamePrefix, dpnId, getDpnLocalIp(dpnId, tx), tx);
153 }), LOG, "Error updating transport zone");
156 @SuppressWarnings("checkstyle:IllegalCatch")
157 private void updateTransportZone(String zoneName, BigInteger dpnId, @Nullable String localIp,
158 @Nonnull ReadWriteTransaction tx) throws ReadFailedException {
159 InstanceIdentifier<TransportZone> inst = InstanceIdentifier.create(TransportZones.class)
160 .child(TransportZone.class, new TransportZoneKey(zoneName));
162 // FIXME: Read this through a cache
163 TransportZone zone = tx.read(LogicalDatastoreType.CONFIGURATION, inst).checkedGet().orNull();
166 zone = createZone(ALL_SUBNETS, zoneName);
170 if (addVtep(zone, ALL_SUBNETS, dpnId, localIp)) {
171 updateTransportZone(zone, dpnId, tx);
173 } catch (Exception e) {
174 LOG.error("Failed to add tunnels for dpn {} in zone {}", dpnId, zoneName, e);
178 private void deleteTransportZone(TransportZone zone, BigInteger dpnId, @Nonnull WriteTransaction tx) {
179 InstanceIdentifier<TransportZone> path = InstanceIdentifier.builder(TransportZones.class)
180 .child(TransportZone.class, new TransportZoneKey(zone.getZoneName())).build();
181 tx.delete(LogicalDatastoreType.CONFIGURATION, path);
182 LOG.info("Transport zone {} deleted due to dpn {} handling.", zone.getZoneName(), dpnId);
185 public void deleteTransportZone(String zoneNamePrefix, BigInteger dpnId) {
186 ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(tx -> {
187 Map<String, String> localIps = getDpnLocalIps(dpnId, tx);
188 if (!localIps.isEmpty()) {
189 LOG.debug("Will use local_ips for transport zone delete for dpn {} and zone name prefix {}", dpnId,
191 for (String underlayNetworkName : localIps.values()) {
192 String zoneName = getTzNameForUnderlayNetwork(zoneNamePrefix, underlayNetworkName);
193 deleteTransportZone(zoneName, dpnId, tx);
196 deleteTransportZone(zoneNamePrefix, dpnId, tx);
198 }), LOG, "Error deleting transport zone");
201 @SuppressWarnings("checkstyle:IllegalCatch")
202 private void deleteTransportZone(String zoneName, BigInteger dpnId, @Nonnull ReadWriteTransaction tx)
203 throws ReadFailedException {
204 InstanceIdentifier<TransportZone> inst = InstanceIdentifier.create(TransportZones.class)
205 .child(TransportZone.class, new TransportZoneKey(zoneName));
207 // FIXME: Read this through a cache
208 TransportZone zone = tx.read(LogicalDatastoreType.CONFIGURATION, inst).checkedGet().orNull();
211 deleteTransportZone(zone, dpnId, tx);
212 } catch (Exception e) {
213 LOG.error("Failed to remove tunnels for dpn {} in zone {}", dpnId, zoneName, e);
220 * Update transport zones based on local_ips TEP ips mapping to underlay
222 * Deleted local_ips will be removed from the VTEP list of the corresponding
223 * transport zones.<br>
224 * Added local_ips will be added to all transport zones currently associated
226 * local_ips for whom the underlay network mapping has been changed will be
227 * updated in the VTEP lists of the corresponding transport zones.
233 * @param managerNodeId
234 * uuid of the OVS manager node
236 public void handleOvsdbNodeUpdate(Node origNode, Node updatedNode, String managerNodeId) {
238 String> origLocalIpMap = java.util.Optional
239 .ofNullable(elanBridgeManager.getOpenvswitchOtherConfigMap(origNode, LOCAL_IPS))
240 .orElse(Collections.emptyMap());
242 String> updatedLocalIpMap = java.util.Optional
243 .ofNullable(elanBridgeManager.getOpenvswitchOtherConfigMap(updatedNode, LOCAL_IPS))
244 .orElse(Collections.emptyMap());
245 MapDifference<String, String> mapDiff = Maps.difference(origLocalIpMap, updatedLocalIpMap);
246 if (mapDiff.areEqual()) {
250 java.util.Optional<BigInteger> dpIdOpt = elanBridgeManager.getDpIdFromManagerNodeId(managerNodeId);
251 if (!dpIdOpt.isPresent()) {
252 LOG.debug("No DPN id found for node {}", managerNodeId);
256 ListenableFutures.addErrorLogging(txRunner.callWithNewReadWriteTransactionAndSubmit(tx -> {
257 BigInteger dpId = dpIdOpt.get();
258 Optional<DPNTEPsInfo> dpnTepsInfoOpt = getDpnTepsInfo(dpId, tx);
259 if (!dpnTepsInfoOpt.isPresent()) {
260 LOG.debug("No DPNTEPsInfo found for DPN id {}", dpId);
264 List<TunnelEndPoints> tunnelEndPoints = dpnTepsInfoOpt.get().getTunnelEndPoints();
265 if (tunnelEndPoints == null || tunnelEndPoints.isEmpty()) {
266 LOG.debug("No tunnel endpoints defined for DPN id {}", dpId);
270 Set<String> zonePrefixes = new HashSet<>();
271 Map<String, List<String>> tepTzMap = tunnelEndPoints.stream().collect(Collectors
272 .toMap(tep -> String.valueOf(tep.getIpAddress().getValue()), this::getTepTransportZoneNames));
273 LOG.trace("Transport zone prefixes {}", tepTzMap);
275 handleRemovedLocalIps(mapDiff.entriesOnlyOnLeft(), dpId, zonePrefixes, tepTzMap, tx);
276 handleChangedLocalIps(mapDiff.entriesDiffering(), dpId, zonePrefixes, tepTzMap, tx);
277 handleAddedLocalIps(mapDiff.entriesOnlyOnRight(), dpId, zonePrefixes, tx);
278 }), LOG, "Error handling OVSDB node update");
281 private void handleAddedLocalIps(Map<String, String> addedEntries, BigInteger dpId, Set<String> zonePrefixes,
282 ReadWriteTransaction tx) throws ReadFailedException {
283 if (addedEntries == null || addedEntries.isEmpty()) {
284 LOG.trace("No added local_ips found for DPN {}", dpId);
288 LOG.debug("Added local_ips {} on DPN {}", addedEntries.keySet(), dpId);
289 for (Map.Entry<String, String> addedEntry : addedEntries.entrySet()) {
290 String ipAddress = addedEntry.getKey();
291 String underlayNetworkName = addedEntry.getValue();
292 for (String zonePrefix : zonePrefixes) {
293 String zoneName = getTzNameForUnderlayNetwork(zonePrefix, underlayNetworkName);
294 updateTransportZone(zoneName, dpId, ipAddress, tx);
299 private void handleChangedLocalIps(Map<String, ValueDifference<String>> changedEntries, BigInteger dpId,
300 Set<String> zonePrefixes, Map<String, List<String>> tepTzMap, @Nonnull ReadWriteTransaction tx)
301 throws ReadFailedException {
302 if (changedEntries == null || changedEntries.isEmpty()) {
303 LOG.trace("No changed local_ips found for DPN {}", dpId);
307 LOG.debug("Changing underlay network mapping for local_ips {} on DPN {}", changedEntries.keySet(), dpId);
308 for (Map.Entry<String, ValueDifference<String>> changedEntry : changedEntries.entrySet()) {
309 String ipAddress = changedEntry.getKey();
310 ValueDifference<String> underlayNetworkDiff = changedEntry.getValue();
311 List<String> zoneNames = tepTzMap.get(ipAddress);
312 if (zoneNames != null) {
313 for (String zoneName : zoneNames) {
314 String removedUnderlayNetwork = underlayNetworkDiff.leftValue();
315 String addedUnderlayNetwork = underlayNetworkDiff.rightValue();
316 Optional<String> zonePrefixOpt = getZonePrefixForUnderlayNetwork(zoneName, removedUnderlayNetwork);
317 if (zonePrefixOpt.isPresent()) {
318 String zonePrefix = zonePrefixOpt.get();
319 removeVtep(zoneName, dpId, tx);
320 zonePrefixes.add(zonePrefix);
321 String newZoneName = getTzNameForUnderlayNetwork(zonePrefix, addedUnderlayNetwork);
322 updateTransportZone(newZoneName, dpId, ipAddress, tx);
329 private void handleRemovedLocalIps(Map<String, String> removedEntries, BigInteger dpId, Set<String> zonePrefixes,
330 Map<String, List<String>> tepTzMap, @Nonnull WriteTransaction tx) {
331 if (removedEntries == null || removedEntries.isEmpty()) {
332 LOG.trace("No removed local_ips found on DPN {}", dpId);
336 LOG.debug("Removed local_ips {} for DPN {}", removedEntries.keySet(), dpId);
337 removedEntries.forEach((ipAddress, underlayNetworkName) -> {
338 List<String> zoneNames = tepTzMap.get(ipAddress);
339 if (zoneNames != null) {
340 for (String zoneName : zoneNames) {
341 Optional<String> zonePrefix = getZonePrefixForUnderlayNetwork(zoneName, underlayNetworkName);
342 if (zonePrefix.isPresent()) {
343 removeVtep(zoneName, dpId, tx);
344 zonePrefixes.add(zonePrefix.get());
351 private List<String> getTepTransportZoneNames(TunnelEndPoints tep) {
352 List<TzMembership> tzMembershipList = tep.getTzMembership();
353 if (tzMembershipList == null) {
354 LOG.debug("No TZ membership exist for TEP ip {}", tep.getIpAddress().getValue());
355 return Collections.emptyList();
358 return tzMembershipList.stream().map(TzMembership::getZoneName).distinct()
359 .collect(Collectors.toList());
362 private Optional<DPNTEPsInfo> getDpnTepsInfo(BigInteger dpId, ReadTransaction tx) {
363 InstanceIdentifier<DPNTEPsInfo> identifier = InstanceIdentifier.builder(DpnEndpoints.class)
364 .child(DPNTEPsInfo.class, new DPNTEPsInfoKey(dpId)).build();
366 return tx.read(LogicalDatastoreType.CONFIGURATION, identifier).checkedGet();
367 } catch (ReadFailedException e) {
368 LOG.warn("Failed to read DPNTEPsInfo for DPN id {}", dpId);
369 return Optional.absent();
374 * Tries to add a vtep for a transport zone.
376 * @return Whether a vtep was added or not.
378 private boolean addVtep(TransportZone zone, String subnetIp, BigInteger dpnId, @Nullable String localIp) {
379 List<Subnets> zoneSubnets = zone.getSubnets();
380 if (zoneSubnets == null) {
384 Subnets subnets = getOrAddSubnet(zoneSubnets, subnetIp);
385 for (Vteps existingVtep : subnets.getVteps()) {
386 if (existingVtep.getDpnId().equals(dpnId)) {
391 if (localIp != null) {
392 IpAddress nodeIp = new IpAddress(localIp.toCharArray());
393 VtepsBuilder vtepsBuilder = new VtepsBuilder().setDpnId(dpnId).setIpAddress(nodeIp)
394 .setPortname(TUNNEL_PORT).setOptionOfTunnel(elanConfig.isUseOfTunnels());
395 subnets.getVteps().add(vtepsBuilder.build());
402 private void removeVtep(String zoneName, BigInteger dpId, @Nonnull WriteTransaction tx) {
403 InstanceIdentifier<Vteps> path = InstanceIdentifier.builder(TransportZones.class)
404 .child(TransportZone.class, new TransportZoneKey(zoneName))
405 .child(Subnets.class, new SubnetsKey(new IpPrefix(ALL_SUBNETS.toCharArray())))
406 .child(Vteps.class, new VtepsKey(dpId, TUNNEL_PORT)).build();
407 tx.delete(LogicalDatastoreType.CONFIGURATION, path);
410 // search for relevant subnets for the given subnetIP, add one if it is
412 private Subnets getOrAddSubnet(@Nonnull List<Subnets> subnets, @Nonnull String subnetIp) {
413 IpPrefix subnetPrefix = new IpPrefix(subnetIp.toCharArray());
415 for (Subnets subnet : subnets) {
416 if (subnet.getPrefix().equals(subnetPrefix)) {
421 Subnets retSubnet = buildSubnets(subnetIp);
422 subnets.add(retSubnet);
427 private Subnets buildSubnets(String subnetIp) {
428 SubnetsBuilder subnetsBuilder = new SubnetsBuilder().setDeviceVteps(new ArrayList<>())
429 .setGatewayIp(new IpAddress(ALL_SUBNETS_GW.toCharArray()))
430 .withKey(new SubnetsKey(new IpPrefix(subnetIp.toCharArray()))).setVlanId(0)
431 .setVteps(new ArrayList<>());
432 return subnetsBuilder.build();
435 private String getDpnLocalIp(BigInteger dpId, ReadTransaction tx) throws ReadFailedException {
436 Optional<Node> node = getPortsNode(dpId, tx);
438 if (node.isPresent()) {
439 String localIp = southBoundUtils.getOpenvswitchOtherConfig(node.get(), LOCAL_IP);
440 if (localIp == null) {
441 LOG.error("missing local_ip key in ovsdb:openvswitch-other-configs in operational"
442 + " network-topology for node: {}", node.get().getNodeId().getValue());
452 private Map<String, String> getDpnLocalIps(BigInteger dpId, ReadTransaction tx) throws ReadFailedException {
453 // Example of local IPs from other_config:
454 // local_ips="10.0.43.159:MPLS,11.11.11.11:DSL,ip:underlay-network"
455 return getPortsNode(dpId, tx).toJavaUtil().map(
456 node -> elanBridgeManager.getOpenvswitchOtherConfigMap(node, LOCAL_IPS)).orElse(Collections.emptyMap());
459 @SuppressWarnings("unchecked")
460 private Optional<Node> getPortsNode(BigInteger dpnId, ReadTransaction tx) throws ReadFailedException {
461 InstanceIdentifier<BridgeRefEntry> bridgeRefInfoPath = InstanceIdentifier.create(BridgeRefInfo.class)
462 .child(BridgeRefEntry.class, new BridgeRefEntryKey(dpnId));
464 // FIXME: Read this through a cache
465 Optional<BridgeRefEntry> optionalBridgeRefEntry =
466 tx.read(LogicalDatastoreType.OPERATIONAL, bridgeRefInfoPath).checkedGet();
467 if (!optionalBridgeRefEntry.isPresent()) {
468 LOG.error("no bridge ref entry found for dpnId {}", dpnId);
469 return Optional.absent();
472 InstanceIdentifier<Node> nodeId =
473 optionalBridgeRefEntry.get().getBridgeReference().getValue().firstIdentifierOf(Node.class);
475 // FIXME: Read this through a cache
476 Optional<Node> optionalNode = tx.read(LogicalDatastoreType.OPERATIONAL, nodeId).checkedGet();
477 if (!optionalNode.isPresent()) {
478 LOG.error("missing node for dpnId {}", dpnId);
483 private String getTzNameForUnderlayNetwork(String zoneNamePrefix, String underlayNetworkName) {
484 return zoneNamePrefix + IP_NETWORK_ZONE_NAME_DELIMITER + underlayNetworkName;
487 private Optional<String> getZonePrefixForUnderlayNetwork(String zoneName, String underlayNetworkName) {
488 String[] zoneParts = zoneName.split(IP_NETWORK_ZONE_NAME_DELIMITER + underlayNetworkName);
489 return zoneParts.length == 2 ? Optional.of(zoneParts[0]) : Optional.absent();