bgp/rib-impl/src/test/java/org/opendaylight/protocol/bgp/rib/impl/GracefulRestartTest.java

   1 /*
   2  * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
   3  *
   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
   7  */
   8 package org.opendaylight.protocol.bgp.rib.impl;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertFalse;
  12 import static org.junit.Assert.assertTrue;
  13 import static org.opendaylight.protocol.bgp.rib.impl.CheckUtil.checkIdleState;
  14 import static org.opendaylight.protocol.bgp.rib.impl.CheckUtil.checkStateIsNotRestarting;
  15 import static org.opendaylight.protocol.bgp.rib.impl.CheckUtil.checkUpState;
  16 import static org.opendaylight.protocol.util.CheckUtil.checkReceivedMessages;
  17 import static org.opendaylight.protocol.util.CheckUtil.readDataOperational;
  18 import static org.opendaylight.protocol.util.CheckUtil.waitFutureSuccess;
  19
  20 import com.google.common.collect.ImmutableMap;
  21 import io.netty.channel.Channel;
  22 import io.netty.channel.ChannelFuture;
  23 import java.net.InetSocketAddress;
  24 import java.util.ArrayList;
  25 import java.util.Arrays;
  26 import java.util.Collections;
  27 import java.util.HashMap;
  28 import java.util.HashSet;
  29 import java.util.List;
  30 import java.util.Map;
  31 import java.util.Optional;
  32 import java.util.Set;
  33 import java.util.stream.Collectors;
  34 import org.junit.After;
  35 import org.junit.Before;
  36 import org.junit.Test;
  37 import org.mockito.Mockito;
  38 import org.opendaylight.protocol.bgp.mode.api.PathSelectionMode;
  39 import org.opendaylight.protocol.bgp.mode.impl.add.all.paths.AllPathSelection;
  40 import org.opendaylight.protocol.bgp.parser.BgpTableTypeImpl;
  41 import org.opendaylight.protocol.bgp.rib.impl.config.BgpPeer;
  42 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpAddress;
  43 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
  44 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Address;
  45 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix;
  46 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Address;
  47 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv6Prefix;
  48 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.bgp.rib.rib.loc.rib.tables.routes.Ipv4RoutesCase;
  49 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.inet.rev180329.bgp.rib.rib.loc.rib.tables.routes.Ipv6RoutesCase;
  50 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.Open;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.OpenBuilder;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.ProtocolVersion;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.Update;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.open.message.BgpParameters;
  55 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.BgpTableType;
  56 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev180329.update.attributes.MpReachNlri;
  57 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.BgpRib;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.PeerRole;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.RibId;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.Rib;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.RibKey;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.bgp.rib.rib.LocRib;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.Tables;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev180329.rib.TablesKey;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.BgpOrigin;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.Ipv4AddressFamily;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.Ipv6AddressFamily;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev180329.UnicastSubsequentAddressFamily;
  69 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  70 import org.opendaylight.yangtools.yang.binding.Notification;
  71 import org.opendaylight.yangtools.yang.common.Uint16;
  72 import org.opendaylight.yangtools.yang.common.Uint8;
  73
  74 public class GracefulRestartTest extends AbstractAddPathTest {
  75
  76     private BGPSessionImpl session;
  77     private BGPPeer peer;
  78     private final Set<TablesKey> afiSafiAdvertised = new HashSet<>();
  79     private final Set<TablesKey> gracefulAfiSafiAdvertised = new HashSet<>();
  80     private RIBImpl ribImpl;
  81     private Channel serverChannel;
  82     private final SimpleSessionListener listener = new SimpleSessionListener();
  83     private final BgpParameters parameters = createParameter(false, true, Collections.singletonMap(TABLES_KEY, true));
  84     private static final int DEFERRAL_TIMER = 5;
  85     private static final RibId RIBID = new RibId("test-rib");
  86     private static final Ipv4Prefix PREFIX2 = new Ipv4Prefix("2.2.2.2/32");
  87     private static final Ipv6Prefix PREFIX3 = new Ipv6Prefix("dead:beef::/64");
  88     private static final Ipv6Address IPV6_NEXT_HOP = new Ipv6Address("dead:beef::1");
  89     private static final TablesKey IPV6_TABLES_KEY = new TablesKey(Ipv6AddressFamily.class,
  90             UnicastSubsequentAddressFamily.class);
  91
  92     private static final InstanceIdentifier<LocRib> LOC_RIB_IID = InstanceIdentifier.builder(BgpRib.class)
  93             .child(Rib.class, new RibKey(RIBID))
  94             .child(LocRib.class)
  95             .build();
  96     private static final InstanceIdentifier<Tables> IPV4_IID = LOC_RIB_IID.builder()
  97             .child(Tables.class,TABLES_KEY)
  98             .build();
  99     private static final InstanceIdentifier<Tables> IPV6_IID = LOC_RIB_IID.builder()
 100             .child(Tables.class, IPV6_TABLES_KEY)
 101             .build();
 102
 103     @Override
 104     @Before
 105     public void setUp() throws Exception {
 106         super.setUp();
 107         final Map<TablesKey, PathSelectionMode> pathTables
 108                 = ImmutableMap.of(TABLES_KEY, new AllPathSelection());
 109         final ArrayList<BgpTableType> tableTypes = new ArrayList<>(TABLES_TYPE);
 110         tableTypes.add(new BgpTableTypeImpl(Ipv6AddressFamily.class, UnicastSubsequentAddressFamily.class));
 111         this.ribImpl = new RIBImpl(this.tableRegistry, RIBID, AS_NUMBER, BGP_ID, this.ribExtension,
 112                 this.serverDispatcher, this.codecsRegistry,
 113                 getDomBroker(), getDataBroker(), this.policies, tableTypes, pathTables);
 114
 115         this.ribImpl.instantiateServiceInstance();
 116         this.ribImpl.onGlobalContextUpdated(this.schemaService.getGlobalContext());
 117         final ChannelFuture channelFuture = this.serverDispatcher.createServer(
 118             new InetSocketAddress(RIB_ID, PORT.toJava()));
 119         waitFutureSuccess(channelFuture);
 120         this.serverChannel = channelFuture.channel();
 121
 122         gracefulAfiSafiAdvertised.add(TABLES_KEY);
 123         afiSafiAdvertised.add(TABLES_KEY);
 124         afiSafiAdvertised.add(IPV6_TABLES_KEY);
 125         final BgpPeer bgpPeer = Mockito.mock(BgpPeer.class);
 126         Mockito.doReturn(GRACEFUL_RESTART_TIME).when(bgpPeer).getGracefulRestartTimer();
 127         Mockito.doReturn(Optional.empty()).when(bgpPeer).getErrorHandling();
 128         Mockito.doReturn(createParameter(false, true, Collections.singletonMap(TABLES_KEY, false))
 129                 .getOptionalCapabilities()).when(bgpPeer).getBgpFixedCapabilities();
 130         this.peer = configurePeer(this.tableRegistry, PEER1, this.ribImpl, parameters, PeerRole.Ibgp,
 131                 this.serverRegistry, afiSafiAdvertised, gracefulAfiSafiAdvertised, Collections.emptyMap(), bgpPeer);
 132         this.session = createPeerSession(PEER1, parameters, this.listener);
 133     }
 134
 135     @Override
 136     @After
 137     public void tearDown() throws Exception {
 138         waitFutureSuccess(this.serverChannel.close());
 139         this.session.close();
 140         super.tearDown();
 141     }
 142
 143     /**
 144      * Test correct behavior when connection restart is unnoticed.
 145      * "Correct" means that the previous TCP session MUST be closed, and the new one retained.
 146      * Since the previous connection is considered to be terminated, no NOTIFICATION message should be sent.
 147      */
 148     @Test
 149     public void resetConnectionOnOpenTest() {
 150
 151         checkReceivedMessages(this.listener, 2);
 152         final Open open = createClassicOpen(true);
 153         this.session.writeAndFlush(open);
 154         checkIdleState(this.peer);
 155         checkReceivedMessages(this.listener, 2);
 156     }
 157
 158     /**
 159      * Test that routes from peer that has advertised the Graceful Restart Capability MUST be retained
 160      * for all the address families that were previously received in the Graceful Restart Capability.
 161      *
 162      * @throws Exception on reading Rib failure
 163      */
 164     @Test
 165     public void retainRoutesOnPeerRestartTest() throws Exception {
 166         final List<Ipv4Prefix> ipv4Prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1), new Ipv4Prefix(PREFIX2));
 167         final List<Ipv6Prefix> ipv6Prefixes = Collections.singletonList(new Ipv6Prefix(PREFIX3));
 168         insertRoutes(ipv4Prefixes, ipv6Prefixes);
 169         checkLocRibIpv4Routes(2);
 170         checkLocRibIpv6Routes(1);
 171
 172         this.session.close();
 173         checkIdleState(this.peer);
 174         checkLocRibIpv4Routes(2);
 175         checkLocRibIpv6Routes(0);
 176     }
 177
 178     /**
 179      * If the session does not get re-established within the "Restart Time"
 180      * that the peer advertised previously, the Receiving Speaker MUST
 181      * delete all the stale routes from the peer that it is retaining.
 182      *
 183      * @throws Exception on reading Rib failure
 184      */
 185     @Test
 186     public void removeRoutesOnHoldTimeExpireTest() throws Exception {
 187         retainRoutesOnPeerRestartTest();
 188         checkStateIsNotRestarting(peer, GRACEFUL_RESTART_TIME);
 189         checkLocRibIpv4Routes(0);
 190         checkLocRibIpv6Routes(0);
 191     }
 192
 193     /**
 194      * Once the session is re-established, if the Graceful
 195      * Restart Capability is not received in the re-established session at
 196      * all, then the Receiving Speaker MUST immediately remove all the stale
 197      * routes from the peer that it is retaining for that address family.
 198      *
 199      * @throws Exception on reading Rib failure
 200      */
 201     @Test
 202     public void removeRoutesOnMissingGracefulRestartTest() throws Exception {
 203         retainRoutesOnPeerRestartTest();
 204         this.session = createPeerSession(PEER1, createParameter(false, true, null), this.listener);
 205         checkUpState(listener);
 206         checkLocRibIpv4Routes(0);
 207         checkLocRibIpv6Routes(0);
 208     }
 209
 210     /**
 211      * Once the session is re-established, if a specific address family is not included
 212      * in the newly received Graceful Restart Capability, then the Receiving Speaker
 213      * MUST immediately remove all the stale routes from the peer that it is retaining
 214      * for that address family.
 215      *
 216      *
 217      * @throws Exception on reading Rib failure
 218      */
 219     @Test
 220     public void removeRoutesOnMissingGracefulRestartAfiSafiTest() throws Exception {
 221         retainRoutesOnPeerRestartTest();
 222         this.session = createPeerSession(PEER1, createParameter(false, true,
 223                 Collections.singletonMap(TABLES_KEY, false)), this.listener);
 224         checkUpState(listener);
 225         checkUpState(this.peer);
 226         checkLocRibIpv4Routes(0);
 227         checkLocRibIpv6Routes(0);
 228     }
 229
 230     /**
 231      * Once the End-of-RIB marker for an address family is received from the peer, it MUST
 232      * immediately remove any routes from the peer that are still marked as stale for that
 233      * address family.
 234      *
 235      * @throws Exception on reading Rib failure
 236      */
 237     @Test
 238     public void removeStaleRoutesAfterRestartTest() throws Exception {
 239         retainRoutesOnPeerRestartTest();
 240         this.session = createPeerSession(PEER1, createParameter(false, true,
 241                 Collections.singletonMap(TABLES_KEY, true)), this.listener);
 242         checkUpState(this.listener);
 243         final List<Ipv4Prefix> ipv4prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1));
 244         insertRoutes(ipv4prefixes, null);
 245         insertRoutes(null, null);
 246         checkLocRibIpv4Routes(1);
 247         checkLocRibIpv6Routes(0);
 248     }
 249
 250     /**
 251      * Perform local graceful restart and verify routes are preserved.
 252      *
 253      * @throws Exception on reading Rib failure
 254      */
 255     @Test
 256     public void performLocalGracefulRestart() throws Exception {
 257         final List<Ipv4Prefix> ipv4prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1), new Ipv4Prefix(PREFIX2));
 258         final List<Ipv6Prefix> ipv6prefixes = Arrays.asList(new Ipv6Prefix(PREFIX3));
 259         insertRoutes(ipv4prefixes, ipv6prefixes);
 260         checkLocRibIpv4Routes(2);
 261         checkLocRibIpv6Routes(1);
 262
 263         this.peer.restartGracefully(DEFERRAL_TIMER).get();
 264         this.session = createPeerSession(PEER1, this.parameters, this.listener);
 265         checkUpState(this.listener);
 266         checkUpState(this.peer);
 267         checkLocRibIpv4Routes(2);
 268         checkLocRibIpv6Routes(0);
 269     }
 270
 271     /**
 272      * Wait with route selection until EOT is received.
 273      *
 274      * @throws Exception on reading Rib failure
 275      */
 276     @Test
 277     public void waitForEORonLocalGracefulRestart() throws Exception {
 278         performLocalGracefulRestart();
 279         final List<Ipv4Prefix> ipv4prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1));
 280         final List<Ipv6Prefix> ipv6prefixes = Arrays.asList(new Ipv6Prefix(PREFIX3));
 281         insertRoutes(ipv4prefixes, ipv6prefixes);
 282         checkLocRibIpv4Routes(2);
 283         checkLocRibIpv6Routes(0);
 284         insertRoutes(null, null);
 285         checkLocRibIpv4Routes(2);
 286         checkLocRibIpv6Routes(1);
 287     }
 288
 289     /**
 290      * Wait with route selection until deferral time is expired.
 291      *
 292      * @throws Exception on reading Rib failure
 293      */
 294     @Test
 295     public void waitForDeferralTimerOnLocalGracefulRestart() throws Exception {
 296         performLocalGracefulRestart();
 297         final List<Ipv4Prefix> ipv4prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1));
 298         final List<Ipv6Prefix> ipv6prefixes = Arrays.asList(new Ipv6Prefix(PREFIX3));
 299         insertRoutes(ipv4prefixes, ipv6prefixes);
 300         checkLocRibIpv4Routes(2);
 301         checkLocRibIpv6Routes(0);
 302         checkStateIsNotRestarting(this.peer, DEFERRAL_TIMER);
 303         checkLocRibIpv4Routes(2);
 304         checkLocRibIpv6Routes(1);
 305     }
 306
 307     /**
 308      * After graceful restart is performed from peer side we have to re-advertise routes followed by
 309      * End-of-RIB marker.
 310      *
 311      * @throws Exception on reading Rib failure
 312      */
 313     @Test
 314     public void verifySendEORafterRestartTest() throws Exception {
 315         final SimpleSessionListener listener2 = new SimpleSessionListener();
 316         configurePeer(this.tableRegistry, PEER2, this.ribImpl, this.parameters, PeerRole.Ebgp,
 317                 this.serverRegistry, afiSafiAdvertised, gracefulAfiSafiAdvertised);
 318         final BGPSessionImpl session2 = createPeerSession(PEER2, this.parameters, listener2);
 319         final List<Ipv4Prefix> ipv4Prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1));
 320         final List<Ipv4Prefix> ipv4Prefixes2 = Arrays.asList(new Ipv4Prefix(PREFIX2));
 321         final List<Ipv6Prefix> ipv6Prefixes = Collections.singletonList(new Ipv6Prefix(PREFIX3));
 322         insertRoutes(ipv4Prefixes, ipv6Prefixes);
 323         insertRoutes(ipv4Prefixes2, PEER2, null, null, session2, BgpOrigin.Egp);
 324         checkLocRibIpv4Routes(2);
 325         checkLocRibIpv6Routes(1);
 326         org.opendaylight.protocol.util.CheckUtil.checkReceivedMessages(this.listener, 3);
 327         // verify sending of Ipv4 EOT, Ipv6 EOT and Ipv4 update with route
 328         checkReceivedMessages(this.listener, 3);
 329         assertTrue(this.listener.getListMsg().get(0) instanceof Update);
 330         assertTrue(BgpPeerUtil.isEndOfRib((Update)this.listener.getListMsg().get(0)));
 331         assertTrue(this.listener.getListMsg().get(1) instanceof Update);
 332         assertTrue(BgpPeerUtil.isEndOfRib((Update)this.listener.getListMsg().get(1)));
 333         assertTrue(this.listener.getListMsg().get(2) instanceof Update);
 334         assertFalse(BgpPeerUtil.isEndOfRib((Update)this.listener.getListMsg().get(2)));
 335
 336         this.session.close();
 337         checkIdleState(this.peer);
 338         checkLocRibIpv4Routes(2);
 339         checkLocRibIpv6Routes(0);
 340         // verify nothing new was sent
 341         checkReceivedMessages(this.listener, 3);
 342
 343         this.session = createPeerSession(PEER1, createParameter(false, true,
 344                 Collections.singletonMap(TABLES_KEY, true)), this.listener);
 345         checkUpState(listener);
 346         checkUpState(this.peer);
 347         org.opendaylight.protocol.util.CheckUtil.checkReceivedMessages(this.listener, 6);
 348         // verify sending of Ipv4 update with route, Ipv4 EOT and Ipv6 EOT; order can vary based on ODTC order
 349         final List<Notification> subList = this.listener.getListMsg().subList(3, 6);
 350         int eotCount = 0;
 351         int routeUpdateCount = 0;
 352         for (Notification message : subList) {
 353             if (BgpPeerUtil.isEndOfRib((Update) message)) {
 354                 eotCount++;
 355             } else {
 356                 routeUpdateCount++;
 357             }
 358         }
 359         assertEquals(2, eotCount);
 360         assertEquals(1, routeUpdateCount);
 361     }
 362
 363     private void checkLocRibIpv4Routes(final int expectedRoutesOnDS) throws Exception {
 364         readDataOperational(getDataBroker(), IPV4_IID, table -> {
 365             int size = 0;
 366             final Ipv4RoutesCase routesCase = (Ipv4RoutesCase) table.getRoutes();
 367             if (routesCase != null && routesCase.getIpv4Routes() != null
 368                     && routesCase.getIpv4Routes().getIpv4Route() != null) {
 369                 size = routesCase.getIpv4Routes().getIpv4Route().size();
 370             }
 371             assertEquals(expectedRoutesOnDS, size);
 372             return table;
 373         });
 374     }
 375
 376     private void checkLocRibIpv6Routes(final int expectedRoutesOnDS) throws Exception {
 377         readDataOperational(getDataBroker(), IPV6_IID, table -> {
 378             int size = 0;
 379             final Ipv6RoutesCase routesCase = (Ipv6RoutesCase) table.getRoutes();
 380             if (routesCase != null && routesCase.getIpv6Routes() != null
 381                     && routesCase.getIpv6Routes().getIpv6Route() != null) {
 382                 size = routesCase.getIpv6Routes().getIpv6Route().size();
 383             }
 384             assertEquals(expectedRoutesOnDS, size);
 385             return table;
 386         });
 387     }
 388
 389     private void insertRoutes(final List<Ipv4Prefix> ipv4prefixes, final List<Ipv6Prefix> ipv6prefixes) {
 390         insertRoutes(ipv4prefixes, PEER1, ipv6prefixes, IPV6_NEXT_HOP, this.session, BgpOrigin.Igp);
 391     }
 392
 393     private static void insertRoutes(final List<Ipv4Prefix> ipv4prefixes, final Ipv4Address ipv4NeighborAddress,
 394                               final List<Ipv6Prefix> ipv6prefixes, final Ipv6Address ipv6NeighborAddress,
 395                               final BGPSessionImpl session, final BgpOrigin peerRole) {
 396         if (ipv4prefixes == null && ipv6prefixes == null) {
 397             waitFutureSuccess(session.writeAndFlush(BgpPeerUtil.createEndOfRib(TABLES_KEY)));
 398             waitFutureSuccess(session.writeAndFlush(BgpPeerUtil.createEndOfRib(IPV6_TABLES_KEY)));
 399             return;
 400         }
 401
 402         if (ipv4prefixes != null && !ipv4prefixes.isEmpty()) {
 403             final MpReachNlri reachIpv4 = PeerUtil.createMpReachNlri(new IpAddress(ipv4NeighborAddress),
 404                     ipv4prefixes.stream()
 405                             .map(IpPrefix::new)
 406                             .collect(Collectors.toList()));
 407             final Update update1 = PeerUtil.createUpdate(peerRole, Collections.emptyList(), 100, reachIpv4, null);
 408             waitFutureSuccess(session.writeAndFlush(update1));
 409         }
 410
 411         if (ipv6prefixes != null && !ipv4prefixes.isEmpty()) {
 412             final MpReachNlri reachIpv6 = PeerUtil.createMpReachNlri(new IpAddress(ipv6NeighborAddress),
 413                     ipv6prefixes.stream()
 414                             .map(IpPrefix::new)
 415                             .collect(Collectors.toList()));
 416             final Update update2 = PeerUtil.createUpdate(peerRole, Collections.emptyList(), 100, reachIpv6, null);
 417             waitFutureSuccess(session.writeAndFlush(update2));
 418         }
 419     }
 420
 421     private static Open createClassicOpen(final boolean addGraceful) {
 422         final Map<TablesKey, Boolean> graceful = new HashMap<>();
 423         if (addGraceful) {
 424             graceful.put(new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class), true);
 425         }
 426         return new OpenBuilder()
 427                 .setMyAsNumber(Uint16.valueOf(AS))
 428                 .setHoldTimer(Uint16.valueOf(HOLDTIMER))
 429                 .setVersion(new ProtocolVersion(Uint8.valueOf(4)))
 430                 .setBgpParameters(Collections.singletonList(createParameter(false, true, graceful)))
 431                 .setBgpIdentifier(PEER1)
 432                 .build();
 433     }
 434 }