diff --git a/assignment-client/src/audio/AudioMixer.cpp b/assignment-client/src/audio/AudioMixer.cpp
index ab4b20b9cc..5e0cd740e6 100644
--- a/assignment-client/src/audio/AudioMixer.cpp
+++ b/assignment-client/src/audio/AudioMixer.cpp
@@ -103,11 +103,6 @@ AudioMixer::AudioMixer(ReceivedMessage& message) :
     );
 
     connect(nodeList.data(), &NodeList::nodeKilled, this, &AudioMixer::handleNodeKilled);
-    connect(nodeList.data(), &NodeList::nodeAdded, this, [this](const SharedNodePointer& node) {
-        if (node->getType() == NodeType::DownstreamAudioMixer) {
-            node->activatePublicSocket();
-        }
-    });
 }
 
 void AudioMixer::queueAudioPacket(QSharedPointer<ReceivedMessage> message, SharedNodePointer node) {
@@ -389,7 +384,10 @@ void AudioMixer::start() {
     auto nodeList = DependencyManager::get<NodeList>();
 
     // prepare the NodeList
-    nodeList->addSetOfNodeTypesToNodeInterestSet({ NodeType::Agent, NodeType::DownstreamAudioMixer, NodeType::EntityScriptServer });
+    nodeList->addSetOfNodeTypesToNodeInterestSet({
+        NodeType::Agent, NodeType::EntityScriptServer,
+        NodeType::UpstreamAudioMixer, NodeType::DownstreamAudioMixer
+    });
     nodeList->linkedDataCreateCallback = [&](Node* node) { getOrCreateClientData(node); };
 
     // parse out any AudioMixer settings
diff --git a/assignment-client/src/audio/AudioMixerClientData.cpp b/assignment-client/src/audio/AudioMixerClientData.cpp
index bf19a02d9a..0467b82d40 100644
--- a/assignment-client/src/audio/AudioMixerClientData.cpp
+++ b/assignment-client/src/audio/AudioMixerClientData.cpp
@@ -67,7 +67,6 @@ void AudioMixerClientData::processPackets() {
             case PacketType::MicrophoneAudioNoEcho:
             case PacketType::MicrophoneAudioWithEcho:
             case PacketType::InjectAudio:
-            case PacketType::AudioStreamStats:
             case PacketType::SilentAudioFrame:
             case PacketType::ReplicatedMicrophoneAudioNoEcho:
             case PacketType::ReplicatedMicrophoneAudioWithEcho:
@@ -80,11 +79,17 @@ void AudioMixerClientData::processPackets() {
 
                 QMutexLocker lock(&getMutex());
                 parseData(*packet);
-                
+
                 optionallyReplicatePacket(*packet, *node);
 
                 break;
             }
+            case PacketType::AudioStreamStats: {
+                QMutexLocker lock(&getMutex());
+                parseData(*packet);
+
+                break;
+            }
             case PacketType::NegotiateAudioFormat:
                 negotiateAudioFormat(*packet, node);
                 break;
diff --git a/assignment-client/src/avatars/AvatarMixer.cpp b/assignment-client/src/avatars/AvatarMixer.cpp
index 28ede7a77d..40cc3a1c0e 100644
--- a/assignment-client/src/avatars/AvatarMixer.cpp
+++ b/assignment-client/src/avatars/AvatarMixer.cpp
@@ -66,7 +66,6 @@ AvatarMixer::AvatarMixer(ReceivedMessage& message) :
     connect(nodeList.data(), &NodeList::nodeAdded, this, [this](const SharedNodePointer& node) {
         if (node->getType() == NodeType::DownstreamAvatarMixer) {
             getOrCreateClientData(node);
-            node->activatePublicSocket();
         }
     });
 }
@@ -165,10 +164,6 @@ void AvatarMixer::queueIncomingPacket(QSharedPointer<ReceivedMessage> message, S
     _queueIncomingPacketElapsedTime += (end - start);
 }
 
-
-AvatarMixer::~AvatarMixer() {
-}
-
 void AvatarMixer::sendIdentityPacket(AvatarMixerClientData* nodeData, const SharedNodePointer& destinationNode) {
     if (destinationNode->getType() == NodeType::Agent && !destinationNode->isUpstream()) {
         QByteArray individualData = nodeData->getAvatar().identityByteArray();
@@ -862,7 +857,10 @@ AvatarMixerClientData* AvatarMixer::getOrCreateClientData(SharedNodePointer node
 
 void AvatarMixer::domainSettingsRequestComplete() {
     auto nodeList = DependencyManager::get<NodeList>();
-    nodeList->addSetOfNodeTypesToNodeInterestSet({ NodeType::Agent, NodeType::DownstreamAvatarMixer, NodeType::EntityScriptServer });
+    nodeList->addSetOfNodeTypesToNodeInterestSet({
+        NodeType::Agent, NodeType::EntityScriptServer,
+        NodeType::UpstreamAvatarMixer, NodeType::DownstreamAvatarMixer
+    });
 
     // parse the settings to pull out the values we need
     parseDomainServerSettings(nodeList->getDomainHandler().getSettingsObject());
diff --git a/assignment-client/src/avatars/AvatarMixer.h b/assignment-client/src/avatars/AvatarMixer.h
index 58d4487652..ecff7597f6 100644
--- a/assignment-client/src/avatars/AvatarMixer.h
+++ b/assignment-client/src/avatars/AvatarMixer.h
@@ -28,7 +28,6 @@ class AvatarMixer : public ThreadedAssignment {
     Q_OBJECT
 public:
     AvatarMixer(ReceivedMessage& message);
-    ~AvatarMixer();
 public slots:
     /// runs the avatar mixer
     void run() override;
diff --git a/assignment-client/src/avatars/AvatarMixerSlave.cpp b/assignment-client/src/avatars/AvatarMixerSlave.cpp
index 8092518454..b2c6b6a341 100644
--- a/assignment-client/src/avatars/AvatarMixerSlave.cpp
+++ b/assignment-client/src/avatars/AvatarMixerSlave.cpp
@@ -83,9 +83,9 @@ int AvatarMixerSlave::sendReplicatedIdentityPacket(const AvatarMixerClientData*
     if (destinationNode->getType() == NodeType::DownstreamAvatarMixer) {
         QByteArray individualData = nodeData->getConstAvatarData()->identityByteArray();
         individualData.replace(0, NUM_BYTES_RFC4122_UUID, nodeData->getNodeID().toRfc4122()); // FIXME, this looks suspicious
-        auto identityPacket = NLPacket::create(PacketType::ReplicatedAvatarIdentity);
+        auto identityPacket = NLPacketList::create(PacketType::ReplicatedAvatarIdentity, QByteArray(), true, true);
         identityPacket->write(individualData);
-        DependencyManager::get<NodeList>()->sendUnreliablePacket(*identityPacket, *destinationNode);
+        DependencyManager::get<NodeList>()->sendPacketList(std::move(identityPacket), *destinationNode);
         _stats.numIdentityPackets++;
         return individualData.size();
     } else {
diff --git a/domain-server/resources/describe-settings.json b/domain-server/resources/describe-settings.json
index c7dc97f595..bc67a31c02 100644
--- a/domain-server/resources/describe-settings.json
+++ b/domain-server/resources/describe-settings.json
@@ -1339,6 +1339,7 @@
     {
       "name": "broadcasting",
       "label": "Broadcasting",
+      "restart": false,
       "settings": [
         {
           "name": "users",
@@ -1395,6 +1396,46 @@
               ]
             }
           ]
+        },
+        {
+          "name": "upstream_servers",
+          "label": "Broadcasting Servers",
+          "assignment-types": [0,1],
+          "type": "table",
+          "advanced": true,
+          "can_add_new_rows": true,
+          "help": "Servers that broadcast data to this domain",
+          "numbered": false,
+          "columns": [
+            {
+              "name": "address",
+              "label": "Address",
+              "can_set": true
+            },
+            {
+              "name": "port",
+              "label": "Port",
+              "can_set": true
+            },
+            {
+              "name": "server_type",
+              "label": "Server Type",
+              "type": "select",
+              "placeholder": "Audio Mixer",
+              "default": "Audio Mixer",
+              "can_set": true,
+              "options": [
+                {
+                  "value": "Audio Mixer",
+                  "label": "Audio Mixer"
+                },
+                {
+                  "value": "Avatar Mixer",
+                  "label": "Avatar Mixer"
+                }
+              ]
+            }
+          ]
         }
       ]
     }
diff --git a/domain-server/src/DomainServer.cpp b/domain-server/src/DomainServer.cpp
index 7c14d2e924..f842b251d4 100644
--- a/domain-server/src/DomainServer.cpp
+++ b/domain-server/src/DomainServer.cpp
@@ -121,6 +121,8 @@ DomainServer::DomainServer(int argc, char* argv[]) :
             this, &DomainServer::updateReplicatedNodes);
     connect(&_settingsManager, &DomainServerSettingsManager::settingsUpdated,
             this, &DomainServer::updateDownstreamNodes);
+    connect(&_settingsManager, &DomainServerSettingsManager::settingsUpdated,
+            this, &DomainServer::updateUpstreamNodes);
 
     setupGroupCacheRefresh();
 
@@ -135,6 +137,7 @@ DomainServer::DomainServer(int argc, char* argv[]) :
 
     updateReplicatedNodes();
     updateDownstreamNodes();
+    updateUpstreamNodes();
 
     if (_type != NonMetaverse) {
         // if we have a metaverse domain, we'll use an access token for API calls
@@ -2229,53 +2232,84 @@ void DomainServer::refreshStaticAssignmentAndAddToQueue(SharedAssignmentPointer&
 
 static const QString BROADCASTING_SETTINGS_KEY = "broadcasting";
 
-void DomainServer::updateDownstreamNodes() {
+struct ReplicationServerInfo {
+    NodeType_t nodeType;
+    HifiSockAddr sockAddr;
+};
+
+ReplicationServerInfo serverInformationFromSettings(QVariantMap serverMap, ReplicationServerDirection direction) {
+    static const QString REPLICATION_SERVER_ADDRESS = "address";
+    static const QString REPLICATION_SERVER_PORT = "port";
+    static const QString REPLICATION_SERVER_TYPE = "server_type";
+
+    if (serverMap.contains(REPLICATION_SERVER_ADDRESS) && serverMap.contains(REPLICATION_SERVER_PORT)
+        && serverMap.contains(REPLICATION_SERVER_TYPE)) {
+
+        auto nodeType = NodeType::fromString(serverMap[REPLICATION_SERVER_TYPE].toString());
+
+        ReplicationServerInfo serverInfo;
+
+        if (direction == Upstream) {
+            serverInfo.nodeType = NodeType::upstreamType(nodeType);
+        } else if (direction == Downstream) {
+            serverInfo.nodeType = NodeType::downstreamType(nodeType);
+        }
+
+        // read the address and port and construct a HifiSockAddr from them
+        serverInfo.sockAddr = {
+            serverMap[REPLICATION_SERVER_ADDRESS].toString(),
+            (quint16) serverMap[REPLICATION_SERVER_PORT].toString().toInt()
+        };
+
+        return serverInfo;
+    }
+
+    return { NodeType::Unassigned, HifiSockAddr() };
+}
+
+void DomainServer::updateReplicationNodes(ReplicationServerDirection direction) {
     auto settings = _settingsManager.getSettingsMap();
+
     if (settings.contains(BROADCASTING_SETTINGS_KEY)) {
         auto nodeList = DependencyManager::get<LimitedNodeList>();
-        std::vector<HifiSockAddr> downstreamNodesInSettings;
-        auto replicationSettings = settings.value(BROADCASTING_SETTINGS_KEY).toMap();
-        if (replicationSettings.contains("downstream_servers")) {
-            auto serversSettings = replicationSettings.value("downstream_servers").toList();
+        std::vector<HifiSockAddr> replicationNodesInSettings;
 
-            std::vector<HifiSockAddr> knownDownstreamNodes;
+        auto replicationSettings = settings.value(BROADCASTING_SETTINGS_KEY).toMap();
+
+        QString serversKey = direction == Upstream ? "upstream_servers" : "downstream_servers";
+        QString replicationDirection = direction == Upstream ? "upstream" : "downstream";
+
+        if (replicationSettings.contains(serversKey)) {
+            auto serversSettings = replicationSettings.value(serversKey).toList();
+
+            std::vector<HifiSockAddr> knownReplicationNodes;
             nodeList->eachNode([&](const SharedNodePointer& otherNode) {
-                if (NodeType::isDownstream(otherNode->getType())) {
-                    knownDownstreamNodes.push_back(otherNode->getPublicSocket());
+                if ((direction == Upstream && NodeType::isUpstream(otherNode->getType()))
+                    || (direction == Downstream && NodeType::isDownstream(otherNode->getType()))) {
+                    knownReplicationNodes.push_back(otherNode->getPublicSocket());
                 }
             });
 
             for (auto& server : serversSettings) {
-                auto downstreamServer = server.toMap();
+                auto replicationServer = serverInformationFromSettings(server.toMap(), direction);
 
-                static const QString DOWNSTREAM_SERVER_ADDRESS = "address";
-                static const QString DOWNSTREAM_SERVER_PORT = "port";
-                static const QString DOWNSTREAM_SERVER_TYPE = "server_type";
+                if (!replicationServer.sockAddr.isNull() && replicationServer.nodeType != NodeType::Unassigned) {
+                    // make sure we have the settings we need for this replication server
+                    replicationNodesInSettings.push_back(replicationServer.sockAddr);
 
-                // make sure we have the settings we need for this downstream server
-                if (downstreamServer.contains(DOWNSTREAM_SERVER_ADDRESS) && downstreamServer.contains(DOWNSTREAM_SERVER_PORT)) {
-
-                    auto nodeType = NodeType::fromString(downstreamServer[DOWNSTREAM_SERVER_TYPE].toString());
-                    auto downstreamNodeType = NodeType::downstreamType(nodeType);
-
-                    // read the address and port and construct a HifiSockAddr from them
-                    HifiSockAddr downstreamServerAddr {
-                        downstreamServer[DOWNSTREAM_SERVER_ADDRESS].toString(),
-                        (quint16) downstreamServer[DOWNSTREAM_SERVER_PORT].toString().toInt()
-                    };
-                    downstreamNodesInSettings.push_back(downstreamServerAddr);
-
-                    bool knownNode = find(knownDownstreamNodes.cbegin(), knownDownstreamNodes.cend(),
-                                          downstreamServerAddr) != knownDownstreamNodes.cend();
+                    bool knownNode = find(knownReplicationNodes.cbegin(), knownReplicationNodes.cend(),
+                                          replicationServer.sockAddr) != knownReplicationNodes.cend();
                     if (!knownNode) {
-                        // manually add the downstream node to our node list
-                        auto node = nodeList->addOrUpdateNode(QUuid::createUuid(), downstreamNodeType,
-                                                              downstreamServerAddr, downstreamServerAddr);
+                        // manually add the replication node to our node list
+                        auto node = nodeList->addOrUpdateNode(QUuid::createUuid(), replicationServer.nodeType,
+                                                              replicationServer.sockAddr, replicationServer.sockAddr,
+                                                              false, direction == Upstream);
                         node->setIsForcedNeverSilent(true);
 
-                        qDebug() << "Adding downstream node:" << node->getUUID() << downstreamServerAddr;
+                        qDebug() << "Adding" << (direction == Upstream ? "upstream" : "downstream")
+                            << "node:" << node->getUUID() << replicationServer.sockAddr;
 
-                        // manually activate the public socket for the downstream node
+                        // manually activate the public socket for the replication node
                         node->activatePublicSocket();
                     }
                 }
@@ -2288,11 +2322,13 @@ void DomainServer::updateDownstreamNodes() {
         // we cannot recursively take the write lock required by handleKillNode)
         std::vector<SharedNodePointer> nodesToKill;
         nodeList->eachNode([&](const SharedNodePointer& otherNode) {
-            if (NodeType::isDownstream(otherNode->getType())) {
-                bool nodeInSettings = find(downstreamNodesInSettings.cbegin(), downstreamNodesInSettings.cend(),
-                                           otherNode->getPublicSocket()) != downstreamNodesInSettings.cend();
+            if ((direction == Upstream && NodeType::isUpstream(otherNode->getType()))
+                || (direction == Downstream && NodeType::isDownstream(otherNode->getType()))) {
+                bool nodeInSettings = find(replicationNodesInSettings.cbegin(), replicationNodesInSettings.cend(),
+                                           otherNode->getPublicSocket()) != replicationNodesInSettings.cend();
                 if (!nodeInSettings) {
-                    qDebug() << "Removing downstream node:" << otherNode->getUUID() << otherNode->getPublicSocket();
+                    qDebug() << "Removing" << replicationDirection
+                        << "node:" << otherNode->getUUID() << otherNode->getPublicSocket();
                     nodesToKill.push_back(otherNode);
                 }
             }
@@ -2304,6 +2340,14 @@ void DomainServer::updateDownstreamNodes() {
     }
 }
 
+void DomainServer::updateDownstreamNodes() {
+    updateReplicationNodes(Downstream);
+}
+
+void DomainServer::updateUpstreamNodes() {
+    updateReplicationNodes(Upstream);
+}
+
 void DomainServer::updateReplicatedNodes() {
     // Make sure we have downstream nodes in our list
     auto settings = _settingsManager.getSettingsMap();
diff --git a/domain-server/src/DomainServer.h b/domain-server/src/DomainServer.h
index 7e43397e9c..8851e3380b 100644
--- a/domain-server/src/DomainServer.h
+++ b/domain-server/src/DomainServer.h
@@ -39,6 +39,11 @@ typedef QMultiHash<QUuid, WalletTransaction*> TransactionHash;
 using Subnet = QPair<QHostAddress, int>;
 using SubnetList = std::vector<Subnet>;
 
+enum ReplicationServerDirection {
+    Upstream,
+    Downstream
+};
+
 class DomainServer : public QCoreApplication, public HTTPSRequestHandler {
     Q_OBJECT
 public:
@@ -104,6 +109,7 @@ private slots:
 
     void updateReplicatedNodes();
     void updateDownstreamNodes();
+    void updateUpstreamNodes();
 
 signals:
     void iceServerChanged();
@@ -170,6 +176,8 @@ private:
 
     QString pathForRedirect(QString path = QString()) const;
 
+    void updateReplicationNodes(ReplicationServerDirection direction);
+
     SubnetList _acSubnetWhitelist;
 
     std::vector<QString> _replicatedUsernames;
diff --git a/libraries/networking/src/LimitedNodeList.cpp b/libraries/networking/src/LimitedNodeList.cpp
index d2bae28820..eab0e5e41f 100644
--- a/libraries/networking/src/LimitedNodeList.cpp
+++ b/libraries/networking/src/LimitedNodeList.cpp
@@ -257,8 +257,40 @@ bool LimitedNodeList::packetSourceAndHashMatchAndTrackBandwidth(const udt::Packe
     PacketType headerType = NLPacket::typeInHeader(packet);
 
     if (NON_SOURCED_PACKETS.contains(headerType)) {
-        emit dataReceived(NodeType::Unassigned, packet.getPayloadSize());
-        return true;
+        if (REPLICATED_PACKET_MAPPING.key(headerType) != PacketType::Unknown) {
+            // this is a replicated packet type - make sure the socket that sent it to us matches
+            // one from one of our current upstream nodes
+
+            NodeType_t sendingNodeType { NodeType::Unassigned };
+
+            eachNodeBreakable([&packet, &sendingNodeType](const SharedNodePointer& node){
+                if (NodeType::isUpstream(node->getType()) && node->getPublicSocket() == packet.getSenderSockAddr()) {
+                    sendingNodeType = node->getType();
+                    return false;
+                } else {
+                    return true;
+                }
+            });
+
+            if (sendingNodeType != NodeType::Unassigned) {
+                emit dataReceived(sendingNodeType, packet.getPayloadSize());
+                return true;
+            } else {
+                static const QString UNSOLICITED_REPLICATED_REGEX =
+                    "Replicated packet of type \\d+ \\([\\sa-zA-Z:]+\\) received from unknown upstream";
+                static QString repeatedMessage
+                    = LogHandler::getInstance().addRepeatedMessageRegex(UNSOLICITED_REPLICATED_REGEX);
+
+                qCDebug(networking) << "Replicated packet of type" << headerType
+                    << "received from unknown upstream" << packet.getSenderSockAddr();
+                
+                return false;
+            }
+            
+        } else {
+            emit dataReceived(NodeType::Unassigned, packet.getPayloadSize());
+            return true;
+        }
     } else {
         QUuid sourceID = NLPacket::sourceIDInHeader(packet);
 
@@ -583,14 +615,14 @@ SharedNodePointer LimitedNodeList::addOrUpdateNode(const QUuid& uuid, NodeType_t
         matchingNode->setPermissions(permissions);
         matchingNode->setConnectionSecret(connectionSecret);
         matchingNode->setIsReplicated(isReplicated);
-        matchingNode->setIsUpstream(isUpstream);
+        matchingNode->setIsUpstream(isUpstream || NodeType::isUpstream(nodeType));
 
         return matchingNode;
     } else {
         // we didn't have this node, so add them
         Node* newNode = new Node(uuid, nodeType, publicSocket, localSocket);
         newNode->setIsReplicated(isReplicated);
-        newNode->setIsUpstream(isUpstream);
+        newNode->setIsUpstream(isUpstream || NodeType::isUpstream(nodeType));
         newNode->setConnectionSecret(connectionSecret);
         newNode->setPermissions(permissions);
 
diff --git a/libraries/networking/src/Node.cpp b/libraries/networking/src/Node.cpp
index ea1b6e0eb5..d7f8f404e6 100644
--- a/libraries/networking/src/Node.cpp
+++ b/libraries/networking/src/Node.cpp
@@ -42,6 +42,8 @@ void NodeType::init() {
     TypeNameHash.insert(NodeType::MessagesMixer, "Messages Mixer");
     TypeNameHash.insert(NodeType::AssetServer, "Asset Server");
     TypeNameHash.insert(NodeType::EntityScriptServer, "Entity Script Server");
+    TypeNameHash.insert(NodeType::UpstreamAudioMixer, "Upstream Audio Mixer");
+    TypeNameHash.insert(NodeType::UpstreamAvatarMixer, "Upstream Avatar Mixer");
     TypeNameHash.insert(NodeType::DownstreamAudioMixer, "Downstream Audio Mixer");
     TypeNameHash.insert(NodeType::DownstreamAvatarMixer, "Downstream Avatar Mixer");
     TypeNameHash.insert(NodeType::Unassigned, "Unassigned");
@@ -52,8 +54,23 @@ const QString& NodeType::getNodeTypeName(NodeType_t nodeType) {
     return matchedTypeName != TypeNameHash.end() ? matchedTypeName.value() : UNKNOWN_NodeType_t_NAME;
 }
 
+bool NodeType::isUpstream(NodeType_t nodeType) {
+    return nodeType == NodeType::UpstreamAudioMixer || nodeType == NodeType::UpstreamAvatarMixer;
+}
+
 bool NodeType::isDownstream(NodeType_t nodeType) {
-    return nodeType ==  NodeType::DownstreamAudioMixer || nodeType == NodeType::DownstreamAvatarMixer;
+    return nodeType == NodeType::DownstreamAudioMixer || nodeType == NodeType::DownstreamAvatarMixer;
+}
+
+NodeType_t NodeType::upstreamType(NodeType_t primaryType) {
+    switch (primaryType) {
+        case AudioMixer:
+            return UpstreamAudioMixer;
+        case AvatarMixer:
+            return UpstreamAvatarMixer;
+        default:
+            return Unassigned;
+    }
 }
 
 NodeType_t NodeType::downstreamType(NodeType_t primaryType) {
diff --git a/libraries/networking/src/NodeList.cpp b/libraries/networking/src/NodeList.cpp
index f502cb2a3c..e8506e5263 100644
--- a/libraries/networking/src/NodeList.cpp
+++ b/libraries/networking/src/NodeList.cpp
@@ -669,9 +669,11 @@ void NodeList::parseNodeFromPacketStream(QDataStream& packetStream) {
     SharedNodePointer node = addOrUpdateNode(nodeUUID, nodeType, nodePublicSocket,
                                              nodeLocalSocket, isReplicated, false, connectionUUID, permissions);
 
-    // nodes that are downstream of our own type are kept alive when we hear about them from the domain server
-    if (node->getType() == NodeType::downstreamType(_ownerType)) {
+    // nodes that are downstream or upstream of our own type are kept alive when we hear about them from the domain server
+    // and always have their public socket as their active socket
+    if (node->getType() == NodeType::downstreamType(_ownerType) || node->getType() == NodeType::upstreamType(_ownerType)) {
         node->setLastHeardMicrostamp(usecTimestampNow());
+        node->activatePublicSocket();
     }
 }
 
diff --git a/libraries/networking/src/NodeType.h b/libraries/networking/src/NodeType.h
index dacd5e1a68..0130e92cfc 100644
--- a/libraries/networking/src/NodeType.h
+++ b/libraries/networking/src/NodeType.h
@@ -25,6 +25,8 @@ namespace NodeType {
     const NodeType_t AssetServer = 'A';
     const NodeType_t MessagesMixer = 'm';
     const NodeType_t EntityScriptServer = 'S';
+    const NodeType_t UpstreamAudioMixer = 'B';
+    const NodeType_t UpstreamAvatarMixer = 'C';
     const NodeType_t DownstreamAudioMixer = 'a';
     const NodeType_t DownstreamAvatarMixer = 'w';
     const NodeType_t Unassigned = 1;
@@ -32,9 +34,12 @@ namespace NodeType {
     void init();
 
     const QString& getNodeTypeName(NodeType_t nodeType);
+    bool isUpstream(NodeType_t nodeType);
     bool isDownstream(NodeType_t nodeType);
+    NodeType_t upstreamType(NodeType_t primaryType);
     NodeType_t downstreamType(NodeType_t primaryType);
 
+
     NodeType_t fromString(QString type);
 }
 
diff --git a/libraries/networking/src/udt/PacketHeaders.cpp b/libraries/networking/src/udt/PacketHeaders.cpp
index fb416cac4d..ad15d04db1 100644
--- a/libraries/networking/src/udt/PacketHeaders.cpp
+++ b/libraries/networking/src/udt/PacketHeaders.cpp
@@ -51,6 +51,7 @@ const QHash<PacketType, PacketType> REPLICATED_PACKET_MAPPING {
     { PacketType::SilentAudioFrame, PacketType::ReplicatedSilentAudioFrame },
     { PacketType::AvatarIdentity, PacketType::ReplicatedAvatarIdentity },
     { PacketType::KillAvatar, PacketType::ReplicatedKillAvatar },
+    { PacketType::BulkAvatarData, PacketType::ReplicatedBulkAvatarData }
 };
 
 PacketVersion versionForPacketType(PacketType packetType) {