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.IpAddressNoZone;
  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.Ipv4AddressNoZone;
  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.Ipv6AddressNoZone;
  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.rev200120.Open;
  51 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.OpenBuilder;
  52 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.ProtocolVersion;
  53 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.Update;
  54 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev200120.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.rev200120.BgpOrigin;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev200120.Ipv4AddressFamily;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev200120.Ipv6AddressFamily;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev200120.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 Ipv6AddressNoZone IPV6_NEXT_HOP = new Ipv6AddressNoZone("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         final ChannelFuture channelFuture = this.serverDispatcher.createServer(
 117             new InetSocketAddress(RIB_ID, PORT.toJava()));
 118         waitFutureSuccess(channelFuture);
 119         this.serverChannel = channelFuture.channel();
 120
 121         gracefulAfiSafiAdvertised.add(TABLES_KEY);
 122         afiSafiAdvertised.add(TABLES_KEY);
 123         afiSafiAdvertised.add(IPV6_TABLES_KEY);
 124         final BgpPeer bgpPeer = Mockito.mock(BgpPeer.class);
 125         Mockito.doReturn(GRACEFUL_RESTART_TIME).when(bgpPeer).getGracefulRestartTimer();
 126         Mockito.doReturn(Optional.empty()).when(bgpPeer).getErrorHandling();
 127         Mockito.doReturn(createParameter(false, true, Collections.singletonMap(TABLES_KEY, false))
 128                 .getOptionalCapabilities()).when(bgpPeer).getBgpFixedCapabilities();
 129         this.peer = configurePeer(this.tableRegistry, PEER1, this.ribImpl, parameters, PeerRole.Ibgp,
 130                 this.serverRegistry, afiSafiAdvertised, gracefulAfiSafiAdvertised, Collections.emptyMap(), bgpPeer);
 131         this.session = createPeerSession(PEER1, parameters, this.listener);
 132     }
 133
 134     @Override
 135     @After
 136     public void tearDown() throws Exception {
 137         waitFutureSuccess(this.serverChannel.close());
 138         this.session.close();
 139         super.tearDown();
 140     }
 141
 142     /**
 143      * Test correct behavior when connection restart is unnoticed.
 144      * "Correct" means that the previous TCP session MUST be closed, and the new one retained.
 145      * Since the previous connection is considered to be terminated, no NOTIFICATION message should be sent.
 146      */
 147     @Test
 148     public void resetConnectionOnOpenTest() {
 149
 150         checkReceivedMessages(this.listener, 2);
 151         final Open open = createClassicOpen(true);
 152         this.session.writeAndFlush(open);
 153         checkIdleState(this.peer);
 154         checkReceivedMessages(this.listener, 2);
 155     }
 156
 157     /**
 158      * Test that routes from peer that has advertised the Graceful Restart Capability MUST be retained
 159      * for all the address families that were previously received in the Graceful Restart Capability.
 160      *
 161      * @throws Exception on reading Rib failure
 162      */
 163     @Test
 164     public void retainRoutesOnPeerRestartTest() throws Exception {
 165         final List<Ipv4Prefix> ipv4Prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1), new Ipv4Prefix(PREFIX2));
 166         final List<Ipv6Prefix> ipv6Prefixes = Collections.singletonList(new Ipv6Prefix(PREFIX3));
 167         insertRoutes(ipv4Prefixes, ipv6Prefixes);
 168         checkLocRibIpv4Routes(2);
 169         checkLocRibIpv6Routes(1);
 170
 171         this.session.close();
 172         checkIdleState(this.peer);
 173         checkLocRibIpv4Routes(2);
 174         checkLocRibIpv6Routes(0);
 175     }
 176
 177     /**
 178      * If the session does not get re-established within the "Restart Time"
 179      * that the peer advertised previously, the Receiving Speaker MUST
 180      * delete all the stale routes from the peer that it is retaining.
 181      *
 182      * @throws Exception on reading Rib failure
 183      */
 184     @Test
 185     public void removeRoutesOnHoldTimeExpireTest() throws Exception {
 186         retainRoutesOnPeerRestartTest();
 187         checkStateIsNotRestarting(peer, GRACEFUL_RESTART_TIME);
 188         checkLocRibIpv4Routes(0);
 189         checkLocRibIpv6Routes(0);
 190     }
 191
 192     /**
 193      * Once the session is re-established, if the Graceful
 194      * Restart Capability is not received in the re-established session at
 195      * all, then the Receiving Speaker MUST immediately remove all the stale
 196      * routes from the peer that it is retaining for that address family.
 197      *
 198      * @throws Exception on reading Rib failure
 199      */
 200     @Test
 201     public void removeRoutesOnMissingGracefulRestartTest() throws Exception {
 202         retainRoutesOnPeerRestartTest();
 203         this.session = createPeerSession(PEER1, createParameter(false, true, null), this.listener);
 204         checkUpState(listener);
 205         checkLocRibIpv4Routes(0);
 206         checkLocRibIpv6Routes(0);
 207     }
 208
 209     /**
 210      * Once the session is re-established, if a specific address family is not included
 211      * in the newly received Graceful Restart Capability, then the Receiving Speaker
 212      * MUST immediately remove all the stale routes from the peer that it is retaining
 213      * for that address family.
 214      *
 215      *
 216      * @throws Exception on reading Rib failure
 217      */
 218     @Test
 219     public void removeRoutesOnMissingGracefulRestartAfiSafiTest() throws Exception {
 220         retainRoutesOnPeerRestartTest();
 221         this.session = createPeerSession(PEER1, createParameter(false, true,
 222                 Collections.singletonMap(TABLES_KEY, false)), this.listener);
 223         checkUpState(listener);
 224         checkUpState(this.peer);
 225         checkLocRibIpv4Routes(0);
 226         checkLocRibIpv6Routes(0);
 227     }
 228
 229     /**
 230      * Once the End-of-RIB marker for an address family is received from the peer, it MUST
 231      * immediately remove any routes from the peer that are still marked as stale for that
 232      * address family.
 233      *
 234      * @throws Exception on reading Rib failure
 235      */
 236     @Test
 237     public void removeStaleRoutesAfterRestartTest() throws Exception {
 238         retainRoutesOnPeerRestartTest();
 239         this.session = createPeerSession(PEER1, createParameter(false, true,
 240                 Collections.singletonMap(TABLES_KEY, true)), this.listener);
 241         checkUpState(this.listener);
 242         final List<Ipv4Prefix> ipv4prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1));
 243         insertRoutes(ipv4prefixes, null);
 244         insertRoutes(null, null);
 245         checkLocRibIpv4Routes(1);
 246         checkLocRibIpv6Routes(0);
 247     }
 248
 249     /**
 250      * Perform local graceful restart and verify routes are preserved.
 251      *
 252      * @throws Exception on reading Rib failure
 253      */
 254     @Test
 255     public void performLocalGracefulRestart() throws Exception {
 256         final List<Ipv4Prefix> ipv4prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1), new Ipv4Prefix(PREFIX2));
 257         final List<Ipv6Prefix> ipv6prefixes = Arrays.asList(new Ipv6Prefix(PREFIX3));
 258         insertRoutes(ipv4prefixes, ipv6prefixes);
 259         checkLocRibIpv4Routes(2);
 260         checkLocRibIpv6Routes(1);
 261
 262         this.peer.restartGracefully(DEFERRAL_TIMER).get();
 263         this.session = createPeerSession(PEER1, this.parameters, this.listener);
 264         checkUpState(this.listener);
 265         checkUpState(this.peer);
 266         checkLocRibIpv4Routes(2);
 267         checkLocRibIpv6Routes(0);
 268     }
 269
 270     /**
 271      * Wait with route selection until EOT is received.
 272      *
 273      * @throws Exception on reading Rib failure
 274      */
 275     @Test
 276     public void waitForEORonLocalGracefulRestart() throws Exception {
 277         performLocalGracefulRestart();
 278         final List<Ipv4Prefix> ipv4prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1));
 279         final List<Ipv6Prefix> ipv6prefixes = Arrays.asList(new Ipv6Prefix(PREFIX3));
 280         insertRoutes(ipv4prefixes, ipv6prefixes);
 281         checkLocRibIpv4Routes(2);
 282         checkLocRibIpv6Routes(0);
 283         insertRoutes(null, null);
 284         checkLocRibIpv4Routes(2);
 285         checkLocRibIpv6Routes(1);
 286     }
 287
 288     /**
 289      * Wait with route selection until deferral time is expired.
 290      *
 291      * @throws Exception on reading Rib failure
 292      */
 293     @Test
 294     public void waitForDeferralTimerOnLocalGracefulRestart() throws Exception {
 295         performLocalGracefulRestart();
 296         final List<Ipv4Prefix> ipv4prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1));
 297         final List<Ipv6Prefix> ipv6prefixes = Arrays.asList(new Ipv6Prefix(PREFIX3));
 298         insertRoutes(ipv4prefixes, ipv6prefixes);
 299         checkLocRibIpv4Routes(2);
 300         checkLocRibIpv6Routes(0);
 301         checkStateIsNotRestarting(this.peer, DEFERRAL_TIMER);
 302         checkLocRibIpv4Routes(2);
 303         checkLocRibIpv6Routes(1);
 304     }
 305
 306     /**
 307      * After graceful restart is performed from peer side we have to re-advertise routes followed by
 308      * End-of-RIB marker.
 309      *
 310      * @throws Exception on reading Rib failure
 311      */
 312     @Test
 313     public void verifySendEORafterRestartTest() throws Exception {
 314         final SimpleSessionListener listener2 = new SimpleSessionListener();
 315         configurePeer(this.tableRegistry, PEER2, this.ribImpl, this.parameters, PeerRole.Ebgp,
 316                 this.serverRegistry, afiSafiAdvertised, gracefulAfiSafiAdvertised);
 317         final BGPSessionImpl session2 = createPeerSession(PEER2, this.parameters, listener2);
 318         final List<Ipv4Prefix> ipv4Prefixes = Arrays.asList(new Ipv4Prefix(PREFIX1));
 319         final List<Ipv4Prefix> ipv4Prefixes2 = Arrays.asList(new Ipv4Prefix(PREFIX2));
 320         final List<Ipv6Prefix> ipv6Prefixes = Collections.singletonList(new Ipv6Prefix(PREFIX3));
 321         insertRoutes(ipv4Prefixes, ipv6Prefixes);
 322         insertRoutes(ipv4Prefixes2, PEER2, null, null, session2, BgpOrigin.Egp);
 323         checkLocRibIpv4Routes(2);
 324         checkLocRibIpv6Routes(1);
 325         org.opendaylight.protocol.util.CheckUtil.checkReceivedMessages(this.listener, 3);
 326         // verify sending of Ipv4 EOT, Ipv6 EOT and Ipv4 update with route
 327         checkReceivedMessages(this.listener, 3);
 328         assertTrue(this.listener.getListMsg().get(0) instanceof Update);
 329         assertTrue(BgpPeerUtil.isEndOfRib((Update)this.listener.getListMsg().get(0)));
 330         assertTrue(this.listener.getListMsg().get(1) instanceof Update);
 331         assertTrue(BgpPeerUtil.isEndOfRib((Update)this.listener.getListMsg().get(1)));
 332         assertTrue(this.listener.getListMsg().get(2) instanceof Update);
 333         assertFalse(BgpPeerUtil.isEndOfRib((Update)this.listener.getListMsg().get(2)));
 334
 335         this.session.close();
 336         checkIdleState(this.peer);
 337         checkLocRibIpv4Routes(2);
 338         checkLocRibIpv6Routes(0);
 339         // verify nothing new was sent
 340         checkReceivedMessages(this.listener, 3);
 341
 342         this.session = createPeerSession(PEER1, createParameter(false, true,
 343                 Collections.singletonMap(TABLES_KEY, true)), this.listener);
 344         checkUpState(listener);
 345         checkUpState(this.peer);
 346         org.opendaylight.protocol.util.CheckUtil.checkReceivedMessages(this.listener, 6);
 347         // verify sending of Ipv4 update with route, Ipv4 EOT and Ipv6 EOT; order can vary based on ODTC order
 348         final List<Notification> subList = this.listener.getListMsg().subList(3, 6);
 349         int eotCount = 0;
 350         int routeUpdateCount = 0;
 351         for (Notification message : subList) {
 352             if (BgpPeerUtil.isEndOfRib((Update) message)) {
 353                 eotCount++;
 354             } else {
 355                 routeUpdateCount++;
 356             }
 357         }
 358         assertEquals(2, eotCount);
 359         assertEquals(1, routeUpdateCount);
 360     }
 361
 362     private void checkLocRibIpv4Routes(final int expectedRoutesOnDS) throws Exception {
 363         readDataOperational(getDataBroker(), IPV4_IID, table -> {
 364             int size = 0;
 365             final Ipv4RoutesCase routesCase = (Ipv4RoutesCase) table.getRoutes();
 366             if (routesCase != null && routesCase.getIpv4Routes() != null
 367                     && routesCase.getIpv4Routes().getIpv4Route() != null) {
 368                 size = routesCase.getIpv4Routes().getIpv4Route().size();
 369             }
 370             assertEquals(expectedRoutesOnDS, size);
 371             return table;
 372         });
 373     }
 374
 375     private void checkLocRibIpv6Routes(final int expectedRoutesOnDS) throws Exception {
 376         readDataOperational(getDataBroker(), IPV6_IID, table -> {
 377             int size = 0;
 378             final Ipv6RoutesCase routesCase = (Ipv6RoutesCase) table.getRoutes();
 379             if (routesCase != null && routesCase.getIpv6Routes() != null
 380                     && routesCase.getIpv6Routes().getIpv6Route() != null) {
 381                 size = routesCase.getIpv6Routes().getIpv6Route().size();
 382             }
 383             assertEquals(expectedRoutesOnDS, size);
 384             return table;
 385         });
 386     }
 387
 388     private void insertRoutes(final List<Ipv4Prefix> ipv4prefixes, final List<Ipv6Prefix> ipv6prefixes) {
 389         insertRoutes(ipv4prefixes, PEER1, ipv6prefixes, IPV6_NEXT_HOP, this.session, BgpOrigin.Igp);
 390     }
 391
 392     private static void insertRoutes(final List<Ipv4Prefix> ipv4prefixes, final Ipv4AddressNoZone ipv4NeighborAddress,
 393                               final List<Ipv6Prefix> ipv6prefixes, final Ipv6AddressNoZone ipv6NeighborAddress,
 394                               final BGPSessionImpl session, final BgpOrigin peerRole) {
 395         if (ipv4prefixes == null && ipv6prefixes == null) {
 396             waitFutureSuccess(session.writeAndFlush(BgpPeerUtil.createEndOfRib(TABLES_KEY)));
 397             waitFutureSuccess(session.writeAndFlush(BgpPeerUtil.createEndOfRib(IPV6_TABLES_KEY)));
 398             return;
 399         }
 400
 401         if (ipv4prefixes != null && !ipv4prefixes.isEmpty()) {
 402             final MpReachNlri reachIpv4 = PeerUtil.createMpReachNlri(new IpAddressNoZone(ipv4NeighborAddress),
 403                     ipv4prefixes.stream()
 404                             .map(IpPrefix::new)
 405                             .collect(Collectors.toList()));
 406             final Update update1 = PeerUtil.createUpdate(peerRole, Collections.emptyList(), 100, reachIpv4, null);
 407             waitFutureSuccess(session.writeAndFlush(update1));
 408         }
 409
 410         if (ipv6prefixes != null && !ipv4prefixes.isEmpty()) {
 411             final MpReachNlri reachIpv6 = PeerUtil.createMpReachNlri(new IpAddressNoZone(ipv6NeighborAddress),
 412                     ipv6prefixes.stream()
 413                             .map(IpPrefix::new)
 414                             .collect(Collectors.toList()));
 415             final Update update2 = PeerUtil.createUpdate(peerRole, Collections.emptyList(), 100, reachIpv6, null);
 416             waitFutureSuccess(session.writeAndFlush(update2));
 417         }
 418     }
 419
 420     private static Open createClassicOpen(final boolean addGraceful) {
 421         final Map<TablesKey, Boolean> graceful = new HashMap<>();
 422         if (addGraceful) {
 423             graceful.put(new TablesKey(Ipv4AddressFamily.class, UnicastSubsequentAddressFamily.class), true);
 424         }
 425         return new OpenBuilder()
 426                 .setMyAsNumber(Uint16.valueOf(AS))
 427                 .setHoldTimer(Uint16.valueOf(HOLDTIMER))
 428                 .setVersion(new ProtocolVersion(Uint8.valueOf(4)))
 429                 .setBgpParameters(Collections.singletonList(createParameter(false, true, graceful)))
 430                 .setBgpIdentifier(PEER1)
 431                 .build();
 432     }
 433 }