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