Examples with Peer org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.bgp.rib.rib.Peer used on opensource projects

Example 11 with Peer

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.bgp.rib.rib.Peer in project bgpcep by opendaylight.

the class PeerUpHandler method serializeMessageBody.

@Override
public void serializeMessageBody(final Notification message, final ByteBuf buffer) {
    super.serializeMessageBody(message, buffer);
    Preconditions.checkArgument(message instanceof PeerUpNotification, "An instance of Peer Up notification is required");
    final PeerUpNotification peerUp = (PeerUpNotification) message;
    if (peerUp.getLocalAddress().getIpv4Address() != null) {
        buffer.writeZero(Ipv6Util.IPV6_LENGTH - Ipv4Util.IP4_LENGTH);
        ByteBufWriteUtil.writeIpv4Address(peerUp.getLocalAddress().getIpv4Address(), buffer);
    } else {
        ByteBufWriteUtil.writeIpv6Address(peerUp.getLocalAddress().getIpv6Address(), buffer);
    }
    ByteBufWriteUtil.writeUnsignedShort(peerUp.getLocalPort().getValue(), buffer);
    ByteBufWriteUtil.writeUnsignedShort(peerUp.getRemotePort().getValue(), buffer);
    this.msgRegistry.serializeMessage(new OpenBuilder(peerUp.getSentOpen()).build(), buffer);
    this.msgRegistry.serializeMessage(new OpenBuilder(peerUp.getReceivedOpen()).build(), buffer);
    serializeTlvs(peerUp.getInformation(), buffer);
}

Example 12 with Peer

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.bgp.rib.rib.Peer in project bgpcep by opendaylight.

the class BmpMockSession method advertizePeers.

private void advertizePeers(final InetSocketAddress localAddress) {
    channel.writeAndFlush(BmpMockUtil.createInitiation());
    Ipv4Address peerAddress = PEER_ADDRESS;
    for (int i = 0; i < this.peersCount; i++) {
        channel.writeAndFlush(BmpMockUtil.createPeerUp(peerAddress, localAddress.getAddress()));
        LOG.debug("BMP router {} advertized peer {}", channel.localAddress(), peerAddress);
        advertizeRoutes(this.prePolicyRoutesCount, AdjRibInType.PrePolicy, channel, peerAddress);
        advertizeRoutes(this.postPolicyRoutesCount, AdjRibInType.PostPolicy, channel, peerAddress);
        peerAddress = incrementIpv4Address(peerAddress);
    }
}

Example 13 with Peer

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.bgp.rib.rib.Peer in project bgpcep by opendaylight.

the class LinkAttributesParser method parseLinkAttributes.

/**
 * Parse Link Attributes.
 *
 * @param attributes key is the tlv type and value is the value of the tlv
 * @param protocolId to differentiate parsing methods
 * @return {@link LinkStateAttribute}
 */
static LinkStateAttribute parseLinkAttributes(final Multimap<Integer, ByteBuf> attributes, final ProtocolId protocolId) {
    final LinkAttributesBuilder builder = new LinkAttributesBuilder();
    final List<SrAdjIds> srAdjIds = new ArrayList<>();
    final List<SrLanAdjIds> srLanAdjIds = new ArrayList<>();
    final List<PeerSetSids> peerSetSids = new ArrayList<>();
    for (final Entry<Integer, ByteBuf> entry : attributes.entries()) {
        LOG.trace("Link attribute TLV {}", entry.getKey());
        final int key = entry.getKey();
        final ByteBuf value = entry.getValue();
        switch(key) {
            case TlvUtil.LOCAL_IPV4_ROUTER_ID:
                builder.setLocalIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
                LOG.debug("Parsed IPv4 Router-ID of local node: {}", builder.getLocalIpv4RouterId());
                break;
            case TlvUtil.LOCAL_IPV6_ROUTER_ID:
                builder.setLocalIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
                LOG.debug("Parsed IPv6 Router-ID of local node: {}", builder.getLocalIpv6RouterId());
                break;
            case REMOTE_IPV4_ROUTER_ID:
                builder.setRemoteIpv4RouterId(new Ipv4RouterIdentifier(Ipv4Util.addressForByteBuf(value)));
                LOG.debug("Parsed IPv4 Router-ID of remote node: {}", builder.getRemoteIpv4RouterId());
                break;
            case REMOTE_IPV6_ROUTER_ID:
                builder.setRemoteIpv6RouterId(new Ipv6RouterIdentifier(Ipv6Util.addressForByteBuf(value)));
                LOG.debug("Parsed IPv6 Router-ID of remote node: {}", builder.getRemoteIpv6RouterId());
                break;
            case ADMIN_GROUP:
                builder.setAdminGroup(new AdministrativeGroup(value.readUnsignedInt()));
                LOG.debug("Parsed Administrative Group {}", builder.getAdminGroup());
                break;
            case MAX_BANDWIDTH:
                builder.setMaxLinkBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
                LOG.debug("Parsed Max Bandwidth {}", builder.getMaxLinkBandwidth());
                break;
            case MAX_RESERVABLE_BANDWIDTH:
                builder.setMaxReservableBandwidth(new Bandwidth(ByteArray.readAllBytes(value)));
                LOG.debug("Parsed Max Reservable Bandwidth {}", builder.getMaxReservableBandwidth());
                break;
            case UNRESERVED_BANDWIDTH:
                parseUnreservedBandwidth(value, builder);
                break;
            case TE_METRIC:
                builder.setTeMetric(new TeMetric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
                LOG.debug("Parsed Metric {}", builder.getTeMetric());
                break;
            case LINK_PROTECTION_TYPE:
                builder.setLinkProtection(LinkProtectionType.forValue(value.readShort()));
                LOG.debug("Parsed Link Protection Type {}", builder.getLinkProtection());
                break;
            case MPLS_PROTOCOL:
                final BitArray bits = BitArray.valueOf(value, FLAGS_SIZE);
                builder.setMplsProtocol(new MplsProtocolMask(bits.get(LDP_BIT), bits.get(RSVP_BIT)));
                LOG.debug("Parsed MPLS Protocols: {}", builder.getMplsProtocol());
                break;
            case METRIC:
                // length can 3, 2 or 1
                builder.setMetric(new Metric(ByteArray.bytesToLong(ByteArray.readAllBytes(value))));
                LOG.debug("Parsed Metric {}", builder.getMetric());
                break;
            case SHARED_RISK_LINK_GROUP:
                parseSrlg(value, builder);
                break;
            case LINK_OPAQUE:
                LOG.debug("Parsed Opaque value : {}", ByteBufUtil.hexDump(value));
                break;
            case LINK_NAME:
                builder.setLinkName(new String(ByteArray.readAllBytes(value), StandardCharsets.US_ASCII));
                LOG.debug("Parsed Link Name : {}", builder.getLinkName());
                break;
            case SR_ADJ_ID:
                srAdjIds.add(SrLinkAttributesParser.parseAdjacencySegmentIdentifier(value, protocolId));
                LOG.debug("Parsed Adjacency Segment Identifier :{}", srAdjIds.get(srAdjIds.size() - 1));
                break;
            case SR_LAN_ADJ_ID:
                srLanAdjIds.add(SrLinkAttributesParser.parseLanAdjacencySegmentIdentifier(value, protocolId));
                LOG.debug("Parsed Adjacency Segment Identifier :{}", srLanAdjIds.get(srLanAdjIds.size() - 1));
                break;
            case PEER_NODE_SID_CODE:
                builder.setPeerNodeSid(new PeerNodeSidBuilder(SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
                LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerNodeSid());
                break;
            case PEER_ADJ_SID_CODE:
                builder.setPeerAdjSid(new PeerAdjSidBuilder(SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
                LOG.debug("Parsed Peer Segment Identifier :{}", builder.getPeerAdjSid());
                break;
            case PEER_SET_SID_CODE:
                peerSetSids.add(new PeerSetSidsBuilder(SrLinkAttributesParser.parseEpeAdjacencySegmentIdentifier(value)).build());
                LOG.debug("Parsed Peer Set Sid :{}", peerSetSids.get(peerSetSids.size() - 1));
                break;
            default:
                LOG.warn("TLV {} is not a valid link attribute, ignoring it", key);
        }
    }
    if (!srAdjIds.isEmpty()) {
        builder.setSrAdjIds(srAdjIds);
    }
    if (!srLanAdjIds.isEmpty()) {
        builder.setSrLanAdjIds(srLanAdjIds);
    }
    if (!peerSetSids.isEmpty()) {
        builder.setPeerSetSids(peerSetSids);
    }
    LOG.trace("Finished parsing Link Attributes.");
    return new LinkAttributesCaseBuilder().setLinkAttributes(builder.build()).build();
}

Example 14 with Peer

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.bgp.rib.rib.Peer in project bgpcep by opendaylight.

the class AddPathAllPathsTest method testUseCase1.

/*
     * All-Paths
     *                                            ___________________
     *                                           | ODL BGP 127.0.0.1 |
     * [peer://127.0.0.2; p1, lp100] --(iBGP)--> |                   | --(RR-client, non add-path) --> [Peer://127.0.0.5; (p1, lp100), (p1, lp1200)]
     * [peer://127.0.0.3; p1, lp200] --(iBGP)--> |                   |
     * [peer://127.0.0.4; p1, lp50] --(iBGP)-->  |                   | --(RR-client, add-path) --> [Peer://127.0.0.6; (p1, path-id1, lp100), (p1, path-id2, pl50), (p1, path-id3, pl200), (p1, path-id4, pl20)]
     * [peer://127.0.0.2; p1, lp20] --(iBGP)-->  |___________________|
     * p1 = 1.1.1.1/32
     */
@Test
public void testUseCase1() throws Exception {
    final BgpParameters nonAddPathParams = createParameter(false);
    final BgpParameters addPathParams = createParameter(true);
    final BGPPeer peer1 = configurePeer(PEER1, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session1 = createPeerSession(PEER1, nonAddPathParams, new SimpleSessionListener());
    configurePeer(PEER2, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session2 = createPeerSession(PEER2, nonAddPathParams, new SimpleSessionListener());
    configurePeer(PEER3, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session3 = createPeerSession(PEER3, nonAddPathParams, new SimpleSessionListener());
    final SimpleSessionListener listener4 = new SimpleSessionListener();
    final BGPPeer peer4 = configurePeer(PEER4, this.ribImpl, nonAddPathParams, PeerRole.RrClient, this.serverRegistry);
    BGPPeerState peer4State = peer4.getPeerState();
    assertNull(peer4State.getGroupId());
    assertEquals(new IpAddress(PEER4), peer4State.getNeighborAddress());
    assertEquals(0L, peer4State.getTotalPathsCount());
    assertEquals(0L, peer4State.getTotalPrefixes());
    assertNull(peer4State.getBGPTimersState());
    assertNull(peer4State.getBGPTransportState());
    assertNull(peer4State.getBGPSessionState());
    assertEquals(0L, peer4State.getBGPErrorHandlingState().getErroneousUpdateReceivedCount());
    BGPGracelfulRestartState gracefulRestart = peer4State.getBGPGracelfulRestart();
    assertFalse(gracefulRestart.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(gracefulRestart.isGracefulRestartReceived(TABLES_KEY));
    assertFalse(gracefulRestart.isLocalRestarting());
    assertFalse(gracefulRestart.isPeerRestarting());
    assertEquals(0L, gracefulRestart.getPeerRestartTime());
    BGPAfiSafiState afiSafiState = peer4State.getBGPAfiSafiState();
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiState.getAfiSafisAdvertized());
    assertEquals(Collections.emptySet(), afiSafiState.getAfiSafisReceived());
    assertEquals(0L, afiSafiState.getPrefixesSentCount(TABLES_KEY));
    assertEquals(0L, afiSafiState.getPrefixesReceivedCount(TABLES_KEY));
    assertEquals(0L, afiSafiState.getPrefixesInstalledCount(TABLES_KEY));
    assertFalse(afiSafiState.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiState.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiState.isLocalRestarting());
    assertFalse(afiSafiState.isPeerRestarting());
    assertFalse(afiSafiState.isAfiSafiSupported(TABLES_KEY));
    final BGPSessionImpl session4 = createPeerSession(PEER4, nonAddPathParams, listener4);
    final SimpleSessionListener listener5 = new SimpleSessionListener();
    configurePeer(PEER5, this.ribImpl, addPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session5 = createPeerSession(PEER5, addPathParams, listener5);
    checkPeersPresentOnDataStore(5);
    // the best route
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 1);
    checkReceivedMessages(listener4, 1);
    checkReceivedMessages(listener5, 1);
    assertEquals(UPD_100, listener5.getListMsg().get(0));
    final BGPPeerState peer1State = peer1.getPeerState();
    assertNull(peer1State.getGroupId());
    assertEquals(new IpAddress(PEER1), peer1State.getNeighborAddress());
    assertEquals(1L, peer1State.getTotalPathsCount());
    assertEquals(1L, peer1State.getTotalPrefixes());
    final BGPTimersState timerStatePeer1 = peer1State.getBGPTimersState();
    assertEquals(HOLDTIMER, timerStatePeer1.getNegotiatedHoldTime());
    assertTrue(timerStatePeer1.getUpTime() > 0L);
    final BGPTransportState transportStatePeer1 = peer1State.getBGPTransportState();
    assertEquals(new PortNumber(PORT), transportStatePeer1.getLocalPort());
    assertEquals(new IpAddress(PEER1), transportStatePeer1.getRemoteAddress());
    assertEquals(State.UP, peer1State.getBGPSessionState().getSessionState());
    checkEquals(() -> assertEquals(1L, peer1State.getBGPPeerMessagesState().getUpdateMessagesReceivedCount()));
    checkEquals(() -> assertEquals(0L, peer1State.getBGPPeerMessagesState().getUpdateMessagesSentCount()));
    final BGPSessionState sessionStatePeer1 = peer1State.getBGPSessionState();
    assertFalse(sessionStatePeer1.isAddPathCapabilitySupported());
    assertFalse(sessionStatePeer1.isAsn32CapabilitySupported());
    assertFalse(sessionStatePeer1.isGracefulRestartCapabilitySupported());
    assertTrue(sessionStatePeer1.isMultiProtocolCapabilitySupported());
    assertFalse(sessionStatePeer1.isRouterRefreshCapabilitySupported());
    final BGPAfiSafiState afiSafiStatePeer1 = peer1State.getBGPAfiSafiState();
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiStatePeer1.getAfiSafisAdvertized());
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiStatePeer1.getAfiSafisReceived());
    assertEquals(0L, afiSafiStatePeer1.getPrefixesSentCount(TABLES_KEY));
    assertEquals(1L, afiSafiStatePeer1.getPrefixesReceivedCount(TABLES_KEY));
    assertEquals(1L, afiSafiStatePeer1.getPrefixesInstalledCount(TABLES_KEY));
    assertFalse(afiSafiStatePeer1.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiStatePeer1.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiStatePeer1.isLocalRestarting());
    assertFalse(afiSafiStatePeer1.isPeerRestarting());
    assertTrue(afiSafiStatePeer1.isAfiSafiSupported(TABLES_KEY));
    final BGPRibState ribState = this.ribImpl.getRIBState();
    assertEquals(1, ribState.getPathsCount().size());
    assertEquals(1L, ribState.getTablesPrefixesCount().size());
    assertEquals(BGP_ID, ribState.getRouteId());
    assertEquals(AS_NUMBER, ribState.getAs());
    assertEquals(1L, ribState.getPathCount(TABLES_KEY));
    assertEquals(1L, ribState.getPrefixesCount(TABLES_KEY));
    assertEquals(1L, ribState.getTotalPathsCount());
    assertEquals(1L, ribState.getTotalPrefixesCount());
    final SimpleSessionListener listener6 = new SimpleSessionListener();
    final BGPPeer peer6 = configurePeer(PEER6, this.ribImpl, nonAddPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session6 = createPeerSession(PEER6, nonAddPathParams, listener6);
    checkPeersPresentOnDataStore(6);
    checkReceivedMessages(listener6, 1);
    assertEquals(UPD_NA_100, listener6.getListMsg().get(0));
    causeBGPError(session6);
    checkEquals(() -> assertEquals(1L, peer6.getPeerState().getBGPPeerMessagesState().getNotificationMessagesSentCount()));
    checkPeersPresentOnDataStore(5);
    // the second best route
    sendRouteAndCheckIsOnLocRib(session2, PREFIX1, 50, 2);
    checkReceivedMessages(listener4, 1);
    checkReceivedMessages(listener5, 2);
    assertEquals(UPD_50, listener5.getListMsg().get(1));
    // new best route
    sendRouteAndCheckIsOnLocRib(session3, PREFIX1, 200, 3);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 3);
    assertEquals(UPD_200, listener5.getListMsg().get(2));
    peer4State = peer4.getPeerState();
    assertNull(peer4State.getGroupId());
    assertEquals(new IpAddress(PEER4), peer4State.getNeighborAddress());
    assertEquals(0L, peer4State.getTotalPathsCount());
    assertEquals(0L, peer4State.getTotalPrefixes());
    final BGPTimersState timerState = peer4State.getBGPTimersState();
    assertEquals(HOLDTIMER, timerState.getNegotiatedHoldTime());
    assertTrue(timerState.getUpTime() > 0L);
    final BGPTransportState transportState = peer4State.getBGPTransportState();
    assertEquals(new PortNumber(PORT), transportState.getLocalPort());
    assertEquals(new IpAddress(PEER4), transportState.getRemoteAddress());
    final BGPPeerMessagesState peerMessagesState = peer4State.getBGPPeerMessagesState();
    assertEquals(0L, peerMessagesState.getNotificationMessagesReceivedCount());
    assertEquals(0L, peerMessagesState.getNotificationMessagesSentCount());
    assertEquals(0L, peerMessagesState.getUpdateMessagesReceivedCount());
    assertEquals(2L, peerMessagesState.getUpdateMessagesSentCount());
    final BGPSessionState bgpSessionState = peer4State.getBGPSessionState();
    assertEquals(State.UP, bgpSessionState.getSessionState());
    assertFalse(bgpSessionState.isAddPathCapabilitySupported());
    assertFalse(bgpSessionState.isAsn32CapabilitySupported());
    assertFalse(bgpSessionState.isGracefulRestartCapabilitySupported());
    assertTrue(bgpSessionState.isMultiProtocolCapabilitySupported());
    assertFalse(bgpSessionState.isRouterRefreshCapabilitySupported());
    final BGPErrorHandlingState errorHandling = peer4State.getBGPErrorHandlingState();
    assertEquals(0L, errorHandling.getErroneousUpdateReceivedCount());
    gracefulRestart = peer4State.getBGPGracelfulRestart();
    assertFalse(gracefulRestart.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(gracefulRestart.isGracefulRestartReceived(TABLES_KEY));
    assertFalse(gracefulRestart.isLocalRestarting());
    assertFalse(gracefulRestart.isPeerRestarting());
    assertEquals(0L, gracefulRestart.getPeerRestartTime());
    afiSafiState = peer4State.getBGPAfiSafiState();
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiState.getAfiSafisAdvertized());
    assertEquals(AFI_SAFIS_ADVERTIZED, afiSafiState.getAfiSafisReceived());
    assertEquals(2L, afiSafiState.getPrefixesSentCount(TABLES_KEY));
    assertEquals(0L, afiSafiState.getPrefixesReceivedCount(TABLES_KEY));
    assertEquals(0L, afiSafiState.getPrefixesInstalledCount(TABLES_KEY));
    assertFalse(afiSafiState.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiState.isGracefulRestartAdvertized(TABLES_KEY));
    assertFalse(afiSafiState.isLocalRestarting());
    assertFalse(afiSafiState.isPeerRestarting());
    assertTrue(afiSafiState.isAfiSafiSupported(TABLES_KEY));
    // the worst route
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 20, 3);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 4);
    assertEquals(UPD_200.getAttributes().getLocalPref(), ((Update) listener4.getListMsg().get(1)).getAttributes().getLocalPref());
    assertEquals(UPD_20, listener5.getListMsg().get(3));
    // withdraw second best route, 1 advertisement(1 withdrawal) for add-path supported, none for non add path
    sendWithdrawalRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 5);
    // we advertise again to try new test
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 3);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 6);
    assertEquals(UPD_200, listener5.getListMsg().get(2));
    // withdraw second best route, 1 advertisement(1 withdrawal) for add-path supported, 1 for non add path (withdrawal)
    sendWithdrawalRouteAndCheckIsOnLocRib(session3, PREFIX1, 200, 2);
    checkReceivedMessages(listener4, 3);
    checkReceivedMessages(listener5, 7);
    sendNotification(session1);
    checkEquals(() -> assertEquals(1L, peer1.getPeerState().getBGPPeerMessagesState().getNotificationMessagesReceivedCount()));
    session1.close();
    session2.close();
    session3.close();
    session4.close();
    session5.close();
}

Example 15 with Peer

use of org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.rib.rev171207.bgp.rib.rib.Peer in project bgpcep by opendaylight.

the class AddPathNPathsTest method testUseCase1.

/*
     * N-Paths
     *                                            ___________________
     *                                           | ODL BGP 127.0.0.1 |
     * [peer://127.0.0.2; p1, lp100] --(iBGP)--> |                   | --(RR-client, non add-path) --> [Peer://127.0.0.5; (p1, lp100), (p1, lp1200)]
     * [peer://127.0.0.3; p1, lp200] --(iBGP)--> |                   |
     * [peer://127.0.0.4; p1, lp50] --(iBGP)-->  |                   | --(RR-client, add-path) --> [Peer://127.0.0.6; (p1, path-id1, lp100), (p1, path-id2, pl50), (p1, path-id3, pl200)]
     * [peer://127.0.0.2; p1, lp20] --(iBGP)-->  |___________________|
     * p1 = 1.1.1.1/32
     */
@Test
public void testUseCase1() throws Exception {
    final BgpParameters nonAddPathParams = createParameter(false);
    final BgpParameters addPathParams = createParameter(true);
    configurePeer(PEER1, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session1 = createPeerSession(PEER1, nonAddPathParams, new SimpleSessionListener());
    configurePeer(PEER2, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session2 = createPeerSession(PEER2, nonAddPathParams, new SimpleSessionListener());
    configurePeer(PEER3, this.ribImpl, nonAddPathParams, PeerRole.Ibgp, this.serverRegistry);
    final BGPSessionImpl session3 = createPeerSession(PEER3, nonAddPathParams, new SimpleSessionListener());
    final SimpleSessionListener listener4 = new SimpleSessionListener();
    configurePeer(PEER4, this.ribImpl, nonAddPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session4 = createPeerSession(PEER4, nonAddPathParams, listener4);
    final SimpleSessionListener listener5 = new SimpleSessionListener();
    configurePeer(PEER5, this.ribImpl, addPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session5 = createPeerSession(PEER5, addPathParams, listener5);
    checkPeersPresentOnDataStore(5);
    // new best route so far
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 1);
    checkReceivedMessages(listener4, 1);
    checkReceivedMessages(listener5, 1);
    assertEquals(UPD_100, listener5.getListMsg().get(0));
    final SimpleSessionListener listener6 = new SimpleSessionListener();
    configurePeer(PEER6, this.ribImpl, nonAddPathParams, PeerRole.RrClient, this.serverRegistry);
    final BGPSessionImpl session6 = createPeerSession(PEER6, nonAddPathParams, listener6);
    checkPeersPresentOnDataStore(6);
    checkReceivedMessages(listener6, 1);
    assertEquals(UPD_NA_100, listener6.getListMsg().get(0));
    session6.close();
    checkPeersPresentOnDataStore(5);
    // the second best route
    sendRouteAndCheckIsOnLocRib(session2, PREFIX1, 50, 2);
    checkReceivedMessages(listener4, 1);
    checkReceivedMessages(listener5, 2);
    assertEquals(UPD_50, listener5.getListMsg().get(1));
    // new best route
    sendRouteAndCheckIsOnLocRib(session3, PREFIX1, 200, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 3);
    assertEquals(UPD_200, listener5.getListMsg().get(2));
    // the worst prefix, no changes
    sendRouteAndCheckIsOnLocRib(session2, PREFIX1, 20, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 3);
    // withdraw second best route, 2 advertisement (1 withdrawal) for add-path supported, none for non add path
    sendWithdrawalRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 5);
    // we advertise again to try new test
    sendRouteAndCheckIsOnLocRib(session1, PREFIX1, 100, 2);
    checkReceivedMessages(listener4, 2);
    checkReceivedMessages(listener5, 6);
    // withdraw second best route, 2 advertisement (1 withdrawal) for add-path supported, 1 withdrawal for non add path
    sendWithdrawalRouteAndCheckIsOnLocRib(session3, PREFIX1, 200, 2);
    checkReceivedMessages(listener4, 3);
    checkReceivedMessages(listener5, 8);
    session1.close();
    session2.close();
    session3.close();
    session4.close();
    session5.close();
}