[ONOS-7444] Optimize SONA gw doesn't use vrouter app and quagga anymore
- Done: Deriving MAC address from external peer router, SNAT, Floating IP-based routing, SNAT with VLAN,
        Floating IP-based routing with VLAN
- Todo: GW loadbalancing

Change-Id: Ic3dee387e8b6215b5398691665135a00475a306c
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkAdminService.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkAdminService.java
index fe28d32..b560b8d 100644
--- a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkAdminService.java
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkAdminService.java
@@ -15,8 +15,13 @@
  */
 package org.onosproject.openstacknetworking.api;
 
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onlab.packet.VlanId;
+import org.openstack4j.model.network.ExternalGateway;
 import org.openstack4j.model.network.Network;
 import org.openstack4j.model.network.Port;
+import org.openstack4j.model.network.Router;
 import org.openstack4j.model.network.Subnet;
 
 /**
@@ -91,4 +96,52 @@
      * Clears the existing network, subnet and port states.
      */
     void clear();
+
+    /**
+     * Derives external router mac address with supplied external gateway.
+     *
+     * @param externalGateway external gateway information
+     * @param router router which owns externalGateway
+     * @param vlanId vlan id of external network
+     */
+    void deriveExternalPeerRouterMac(ExternalGateway externalGateway, Router router, VlanId vlanId);
+
+    /**
+     * Deletes external router with supplied external gateway.
+     *
+     * @param externalGateway external gateway information
+     */
+    void deleteExternalPeerRouter(ExternalGateway externalGateway);
+
+    /**
+     * Deletes external router with supplied ip address.
+     *
+     * @param ipAddress ip address
+     */
+    void deleteExternalPeerRouter(String ipAddress);
+
+    /**
+     * Updates external router mac address with supplied ip address.
+     *
+     * @param ipAddress ip address
+     * @param macAddress mac address
+     */
+    void updateExternalPeerRouterMac(IpAddress ipAddress, MacAddress macAddress);
+
+    /**
+     * Updates external router vlan id with supplied ip address.
+     *
+     * @param ipAddress ip address
+     * @param vlanId vlan id
+     */
+    void updateExternalPeerRouterVlan(IpAddress ipAddress, VlanId vlanId);
+
+    /**
+     * Updates external router ith supplied ip address, mac address, vlan id.
+     *
+     * @param ipAddress ip address
+     * @param macAddress mac address
+     * @param vlanId vlan id
+     */
+    void updateExternalPeerRouter(IpAddress ipAddress, MacAddress macAddress, VlanId vlanId);
 }
diff --git a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkService.java b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkService.java
index 7ff07bf..7b192f1 100644
--- a/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkService.java
+++ b/apps/openstacknetworking/api/src/main/java/org/onosproject/openstacknetworking/api/OpenstackNetworkService.java
@@ -17,12 +17,10 @@
 
 import org.onlab.packet.IpAddress;
 import org.onlab.packet.MacAddress;
-import org.onlab.packet.VlanId;
 import org.onosproject.event.ListenerService;
 import org.openstack4j.model.network.ExternalGateway;
 import org.openstack4j.model.network.Network;
 import org.openstack4j.model.network.Port;
-import org.openstack4j.model.network.Router;
 import org.openstack4j.model.network.Subnet;
 
 import java.util.Set;
@@ -102,54 +100,6 @@
     Set<Port> ports(String networkId);
 
     /**
-     * Derives external router mac address with supplied external gateway.
-     *
-     * @param externalGateway external gateway information
-     * @param router router which owns externalGateway
-     * @param vlanId vlan id of external network
-     */
-    void deriveExternalPeerRouterMac(ExternalGateway externalGateway, Router router, VlanId vlanId);
-
-    /**
-     * Deletes external router with supplied external gateway.
-     *
-     * @param externalGateway external gateway information
-     */
-    void deleteExternalPeerRouter(ExternalGateway externalGateway);
-
-    /**
-     * Deletes external router with supplied ip address.
-     *
-     * @param ipAddress ip address
-     */
-    void deleteExternalPeerRouter(String ipAddress);
-
-    /**
-     * Updates external router mac address with supplied ip address.
-     *
-     * @param ipAddress ip address
-     * @param macAddress mac address
-     */
-    void updateExternalPeerRouterMac(IpAddress ipAddress, MacAddress macAddress);
-
-    /**
-     * Updates external router vlan id with supplied ip address.
-     *
-     * @param ipAddress ip address
-     * @param vlanId vlan id
-     */
-    void updateExternalPeerRouterVlan(IpAddress ipAddress, VlanId vlanId);
-
-    /**
-     * Updates external router ith supplied ip address, mac address, vlan id.
-     *
-     * @param ipAddress ip address
-     * @param macAddress mac address
-     * @param vlanId vlan id
-     */
-    void updateExternalPeerRouter(IpAddress ipAddress, MacAddress macAddress, VlanId vlanId);
-
-    /**
      * Returns external router mac with supplied external gateway.
      *
      * @param externalGateway external gateway information
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/DeleteExternalPeerRouterCommand.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/DeleteExternalPeerRouterCommand.java
index efda0ae..551a871 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/DeleteExternalPeerRouterCommand.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/DeleteExternalPeerRouterCommand.java
@@ -20,7 +20,7 @@
 import org.apache.karaf.shell.commands.Command;
 import org.onosproject.cli.AbstractShellCommand;
 import org.onosproject.openstacknetworking.api.ExternalPeerRouter;
-import org.onosproject.openstacknetworking.api.OpenstackNetworkService;
+import org.onosproject.openstacknetworking.api.OpenstackNetworkAdminService;
 
 import java.util.List;
 
@@ -39,7 +39,7 @@
 
     @Override
     protected void execute() {
-        OpenstackNetworkService service = AbstractShellCommand.get(OpenstackNetworkService.class);
+        OpenstackNetworkAdminService service = AbstractShellCommand.get(OpenstackNetworkAdminService.class);
 
         if (service.externalPeerRouters().stream()
                 .noneMatch(router -> router.externalPeerRouterIp().toString().equals(ipAddress))) {
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/UpdateExternalPeerRouterCommand.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/UpdateExternalPeerRouterCommand.java
index 15a7555..5667fa8 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/UpdateExternalPeerRouterCommand.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/UpdateExternalPeerRouterCommand.java
@@ -24,7 +24,7 @@
 import org.onlab.packet.VlanId;
 import org.onosproject.cli.AbstractShellCommand;
 import org.onosproject.openstacknetworking.api.ExternalPeerRouter;
-import org.onosproject.openstacknetworking.api.OpenstackNetworkService;
+import org.onosproject.openstacknetworking.api.OpenstackNetworkAdminService;
 
 import java.util.List;
 
@@ -53,7 +53,7 @@
 
     @Override
     protected void execute() {
-        OpenstackNetworkService service = AbstractShellCommand.get(OpenstackNetworkService.class);
+        OpenstackNetworkAdminService service = AbstractShellCommand.get(OpenstackNetworkAdminService.class);
 
         IpAddress externalPeerIpAddress = IpAddress.valueOf(
                 IpAddress.Version.INET, Ip4Address.valueOf(ipAddress).toOctets());
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/UpdateExternalPeerRouterVlanCommand.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/UpdateExternalPeerRouterVlanCommand.java
index e0aae53..3dc14a7 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/UpdateExternalPeerRouterVlanCommand.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/cli/UpdateExternalPeerRouterVlanCommand.java
@@ -23,7 +23,7 @@
 import org.onlab.packet.VlanId;
 import org.onosproject.cli.AbstractShellCommand;
 import org.onosproject.openstacknetworking.api.ExternalPeerRouter;
-import org.onosproject.openstacknetworking.api.OpenstackNetworkService;
+import org.onosproject.openstacknetworking.api.OpenstackNetworkAdminService;
 import org.onosproject.openstacknetworking.api.OpenstackRouterService;
 import org.openstack4j.model.network.Network;
 import org.openstack4j.model.network.Router;
@@ -51,29 +51,29 @@
 
     @Override
     protected void execute() {
-        OpenstackNetworkService osNetService = AbstractShellCommand.get(OpenstackNetworkService.class);
+        OpenstackNetworkAdminService osNetAdminService = AbstractShellCommand.get(OpenstackNetworkAdminService.class);
         OpenstackRouterService osRouterService = AbstractShellCommand.get(OpenstackRouterService.class);
 
         IpAddress externalPeerIpAddress = IpAddress.valueOf(
                 IpAddress.Version.INET, Ip4Address.valueOf(ipAddress).toOctets());
 
-        if (osNetService.externalPeerRouters().isEmpty()) {
+        if (osNetAdminService.externalPeerRouters().isEmpty()) {
             print(NO_ELEMENT);
             return;
-        } else if (osNetService.externalPeerRouters().stream()
+        } else if (osNetAdminService.externalPeerRouters().stream()
                 .noneMatch(router -> router.externalPeerRouterIp().toString().equals(ipAddress))) {
             print(NO_ELEMENT);
             return;
         }
 
-        Subnet subnet = osNetService.subnets().stream()
+        Subnet subnet = osNetAdminService.subnets().stream()
                 .filter(s -> s.getGateway().equals(ipAddress))
                 .findAny().orElse(null);
         if (subnet == null) {
             return;
         }
 
-        Network network = osNetService.network(subnet.getNetworkId());
+        Network network = osNetAdminService.network(subnet.getNetworkId());
         if (network == null) {
             return;
         }
@@ -88,11 +88,11 @@
 
         try {
             if (vlanId.equals(NONE)) {
-                osNetService.updateExternalPeerRouterVlan(externalPeerIpAddress, VlanId.NONE);
-                osNetService.deriveExternalPeerRouterMac(router.getExternalGatewayInfo(), router, VlanId.NONE);
+                osNetAdminService.updateExternalPeerRouterVlan(externalPeerIpAddress, VlanId.NONE);
+                osNetAdminService.deriveExternalPeerRouterMac(router.getExternalGatewayInfo(), router, VlanId.NONE);
             } else {
-                osNetService.updateExternalPeerRouterVlan(externalPeerIpAddress, VlanId.vlanId(vlanId));
-                osNetService.deriveExternalPeerRouterMac(
+                osNetAdminService.updateExternalPeerRouterVlan(externalPeerIpAddress, VlanId.vlanId(vlanId));
+                osNetAdminService.deriveExternalPeerRouterMac(
                         router.getExternalGatewayInfo(), router, VlanId.vlanId(vlanId));
 
             }
@@ -101,7 +101,7 @@
         }
 
         print(FORMAT, "Router IP", "Mac Address", "VLAN ID");
-        List<ExternalPeerRouter> routers = Lists.newArrayList(osNetService.externalPeerRouters());
+        List<ExternalPeerRouter> routers = Lists.newArrayList(osNetAdminService.externalPeerRouters());
 
         for (ExternalPeerRouter r: routers) {
             print(FORMAT, r.externalPeerRouterIp(),
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingArpHandler.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingArpHandler.java
index 657d7a0..e6be7ef 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingArpHandler.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingArpHandler.java
@@ -35,7 +35,7 @@
 import org.onosproject.net.packet.PacketProcessor;
 import org.onosproject.net.packet.PacketService;
 import org.onosproject.openstacknetworking.api.Constants;
-import org.onosproject.openstacknetworking.api.OpenstackNetworkService;
+import org.onosproject.openstacknetworking.api.OpenstackNetworkAdminService;
 import org.onosproject.openstacknetworking.api.OpenstackRouterService;
 import org.onosproject.openstacknode.api.OpenstackNode;
 import org.onosproject.openstacknode.api.OpenstackNodeService;
@@ -68,7 +68,7 @@
     protected PacketService packetService;
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
-    protected OpenstackNetworkService osNetworkService;
+    protected OpenstackNetworkAdminService osNetworkAdminService;
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected OpenstackRouterService osRouterService;
@@ -114,7 +114,7 @@
 
             //In case target ip is for associated floating ip, sets target mac to vm's.
             if (floatingIP != null && floatingIP.getPortId() != null) {
-                targetMac = MacAddress.valueOf(osNetworkService.port(floatingIP.getPortId()).getMacAddress());
+                targetMac = MacAddress.valueOf(osNetworkAdminService.port(floatingIP.getPortId()).getMacAddress());
             }
 
             if (isExternalGatewaySourceIp(targetIp.getIp4Address())) {
@@ -147,7 +147,7 @@
             try {
                 if (receivedPortNum.equals(
                         osNodeService.node(context.inPacket().receivedFrom().deviceId()).uplinkPortNum())) {
-                    osNetworkService.updateExternalPeerRouterMac(
+                    osNetworkAdminService.updateExternalPeerRouterMac(
                             Ip4Address.valueOf(arp.getSenderProtocolAddress()),
                             MacAddress.valueOf(arp.getSenderHardwareAddress()));
                 }
@@ -185,7 +185,7 @@
     }
 
     private boolean isExternalGatewaySourceIp(IpAddress targetIp) {
-        return osNetworkService.ports().stream()
+        return osNetworkAdminService.ports().stream()
                 .filter(osPort -> Objects.equals(osPort.getDeviceOwner(),
                         DEVICE_OWNER_ROUTER_GW))
                 .flatMap(osPort -> osPort.getFixedIps().stream())
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingFloatingIpHandler.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingFloatingIpHandler.java
index 16607b1..fe41bdc 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingFloatingIpHandler.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingFloatingIpHandler.java
@@ -37,6 +37,7 @@
 import org.onosproject.net.flow.TrafficSelector;
 import org.onosproject.net.flow.TrafficTreatment;
 import org.onosproject.openstacknetworking.api.Constants;
+import org.onosproject.openstacknetworking.api.ExternalPeerRouter;
 import org.onosproject.openstacknetworking.api.InstancePort;
 import org.onosproject.openstacknetworking.api.InstancePortService;
 import org.onosproject.openstacknetworking.api.OpenstackFlowRuleService;
@@ -160,9 +161,15 @@
             throw new IllegalStateException(error);
         }
 
+
+        ExternalPeerRouter externalPeerRouter = externalPeerRouter(osNet);
+        if (externalPeerRouter == null) {
+            return;
+        }
+
         setComputeNodeToGateway(instPort, osNet, install);
-        setDownstreamRules(floatingIp, osNet, instPort, install);
-        setUpstreamRules(floatingIp, osNet, instPort, install);
+        setDownstreamRules(floatingIp, osNet, instPort, externalPeerRouter, install);
+        setUpstreamRules(floatingIp, osNet, instPort, externalPeerRouter, install);
     }
 
     private void setComputeNodeToGateway(InstancePort instPort, Network osNet, boolean install) {
@@ -216,7 +223,8 @@
     }
 
     private void setDownstreamRules(NetFloatingIP floatingIp, Network osNet,
-                                    InstancePort instPort, boolean install) {
+                                    InstancePort instPort, ExternalPeerRouter externalPeerRouter,
+                                    boolean install) {
         OpenstackNode cNode = osNodeService.node(instPort.deviceId());
         if (cNode == null) {
             final String error = String.format("Cannot find openstack node for device %s",
@@ -235,16 +243,22 @@
         }
 
         IpAddress floating = IpAddress.valueOf(floatingIp.getFloatingIpAddress());
-        TrafficSelector externalSelector = DefaultTrafficSelector.builder()
+        TrafficSelector.Builder externalSelectorBuilder = DefaultTrafficSelector.builder()
                 .matchEthType(Ethernet.TYPE_IPV4)
-                .matchIPDst(floating.toIpPrefix())
-                .build();
+                .matchIPDst(floating.toIpPrefix());
+
+        TrafficTreatment.Builder externalBuilder = DefaultTrafficTreatment.builder()
+                .setEthSrc(Constants.DEFAULT_GATEWAY_MAC)
+                .setEthDst(instPort.macAddress())
+                .setIpDst(instPort.ipAddress().getIp4Address());
+
+        if (!externalPeerRouter.externalPeerRouterVlanId().equals(VlanId.NONE)) {
+            externalSelectorBuilder.matchVlanId(externalPeerRouter.externalPeerRouterVlanId()).build();
+            externalBuilder.popVlan();
+        }
 
         osNodeService.completeNodes(GATEWAY).forEach(gNode -> {
-            TrafficTreatment.Builder externalBuilder = DefaultTrafficTreatment.builder()
-                    .setEthSrc(Constants.DEFAULT_GATEWAY_MAC)
-                    .setEthDst(instPort.macAddress())
-                    .setIpDst(instPort.ipAddress().getIp4Address());
+
 
             switch (osNet.getNetworkType()) {
                 case VXLAN:
@@ -270,7 +284,7 @@
             osFlowRuleService.setRule(
                     appId,
                     gNode.intgBridge(),
-                    externalSelector,
+                    externalSelectorBuilder.build(),
                     externalBuilder.build(),
                     PRIORITY_FLOATING_EXTERNAL,
                     GW_COMMON_TABLE,
@@ -321,7 +335,8 @@
     }
 
     private void setUpstreamRules(NetFloatingIP floatingIp, Network osNet,
-                                  InstancePort instPort, boolean install) {
+                                  InstancePort instPort, ExternalPeerRouter externalPeerRouter,
+                                  boolean install) {
         IpAddress floating = IpAddress.valueOf(floatingIp.getFloatingIpAddress());
         TrafficSelector.Builder sBuilder = DefaultTrafficSelector.builder()
                 .matchEthType(Ethernet.TYPE_IPV4)
@@ -340,21 +355,20 @@
                 throw new IllegalStateException(error);
         }
 
-        MacAddress externalPeerRouterMac = externalPeerRouterMac(osNet);
-        if (externalPeerRouterMac == null) {
-            return;
+        TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder()
+                .setIpSrc(floating.getIp4Address())
+                .setEthSrc(instPort.macAddress())
+                .setEthDst(externalPeerRouter.externalPeerRouterMac());
+
+        if (osNet.getNetworkType().equals(NetworkType.VLAN)) {
+            tBuilder.popVlan();
         }
 
+        if (!externalPeerRouter.externalPeerRouterVlanId().equals(VlanId.NONE)) {
+            tBuilder.pushVlan().setVlanId(externalPeerRouter.externalPeerRouterVlanId());
+        }
 
         osNodeService.completeNodes(GATEWAY).forEach(gNode -> {
-            TrafficTreatment.Builder tBuilder = DefaultTrafficTreatment.builder()
-                    .setIpSrc(floating.getIp4Address())
-                    .setEthSrc(instPort.macAddress())
-                    .setEthDst(externalPeerRouterMac);
-
-            if (osNet.getNetworkType().equals(NetworkType.VLAN)) {
-                tBuilder.popVlan();
-            }
 
             osFlowRuleService.setRule(
                     appId,
@@ -367,6 +381,32 @@
         });
     }
 
+    private ExternalPeerRouter externalPeerRouter(Network network) {
+        Subnet subnet = osNetworkService.subnet(network.getId());
+
+        if (subnet == null) {
+            return null;
+        }
+
+        RouterInterface osRouterIface = osRouterService.routerInterfaces().stream()
+                .filter(i -> Objects.equals(i.getSubnetId(), subnet.getId()))
+                .findAny().orElse(null);
+        if (osRouterIface == null) {
+            return null;
+        }
+
+        Router osRouter = osRouterService.router(osRouterIface.getId());
+        if (osRouter == null) {
+            return null;
+        }
+        if (osRouter.getExternalGatewayInfo() == null) {
+            return null;
+        }
+
+        ExternalGateway exGatewayInfo = osRouter.getExternalGatewayInfo();
+        return osNetworkService.externalPeerRouter(exGatewayInfo);
+    }
+
     private MacAddress externalPeerRouterMac(Network network) {
         if (network == null) {
             return null;
diff --git a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingHandler.java b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingHandler.java
index 42a3da4..94cdd42 100644
--- a/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingHandler.java
+++ b/apps/openstacknetworking/app/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackRoutingHandler.java
@@ -55,6 +55,7 @@
 import org.onosproject.openstacknetworking.api.InstancePortListener;
 import org.onosproject.openstacknetworking.api.InstancePortService;
 import org.onosproject.openstacknetworking.api.OpenstackFlowRuleService;
+import org.onosproject.openstacknetworking.api.OpenstackNetworkAdminService;
 import org.onosproject.openstacknetworking.api.OpenstackNetworkService;
 import org.onosproject.openstacknetworking.api.OpenstackRouterEvent;
 import org.onosproject.openstacknetworking.api.OpenstackRouterListener;
@@ -132,6 +133,9 @@
     protected OpenstackNetworkService osNetworkService;
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected OpenstackNetworkAdminService osNetworkAdminService;
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected OpenstackRouterService osRouterService;
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
@@ -217,10 +221,10 @@
         VlanId vlanId = externalPeerRouter == null ? VlanId.NONE : externalPeerRouter.externalPeerRouterVlanId();
 
         if (exGateway == null) {
-            osNetworkService.deleteExternalPeerRouter(exGateway);
+            osNetworkAdminService.deleteExternalPeerRouter(exGateway);
             osRouterService.routerInterfaces(osRouter.getId()).forEach(iface -> setSourceNat(iface, false));
         } else {
-            osNetworkService.deriveExternalPeerRouterMac(exGateway, osRouter, vlanId);
+            osNetworkAdminService.deriveExternalPeerRouterMac(exGateway, osRouter, vlanId);
             osRouterService.routerInterfaces(osRouter.getId()).forEach(iface ->
                     setSourceNat(iface, exGateway.isEnableSnat()));
         }