diff --git a/xos/synchronizer/steps/sync_onos_netcfg.py b/xos/synchronizer/steps/sync_onos_netcfg.py
new file mode 100644
index 0000000..87d7a50
--- /dev/null
+++ b/xos/synchronizer/steps/sync_onos_netcfg.py
@@ -0,0 +1,152 @@
+import os
+import requests
+import socket
+import sys
+import base64
+import json
+from synchronizers.base.syncstep import SyncStep
+from core.models import Service, Slice, Controller, ControllerSlice, ControllerUser, Node, TenantAttribute, Tag
+from services.vtn.models import VTNService
+from services.vrouter.models import VRouterService
+from xos.logger import Logger, logging
+
+logger = Logger(level=logging.INFO)
+
+class SyncONOSNetcfg(SyncStep):
+    provides=[]
+    observes=None
+    requested_interval=0
+
+    def __init__(self, **args):
+        SyncStep.__init__(self, **args)
+
+    def get_node_tag(self, o, node, tagname):
+        tags = Tag.select_by_content_object(node).filter(name=tagname)
+        return tags[0].value
+
+    def get_tenants_who_want_config(self):
+        tenants = []
+        # attribute is comma-separated list
+        for ta in TenantAttribute.objects.filter(name="autogenerate"):
+            if ta.value:
+                for config in ta.value.split(','):
+                    if config == "vtn-network-cfg":
+                        tenants.append(ta.tenant)
+        return tenants
+
+    def save_tenant_attribute(self, tenant, name, value):
+        tas = TenantAttribute.objects.filter(tenant=tenant, name=name)
+        if tas:
+            ta = tas[0]
+            if ta.value != value:
+                logger.info("updating %s with attribute" % name)
+                ta.value = value
+                ta.save()
+        else:
+            logger.info("saving autogenerated config %s" % name)
+            ta = TenantAttribute(tenant=tenant, name=name, value=value)
+            ta.save()
+
+    # This function currently assumes a single Deployment and Site
+    def get_onos_netcfg(self, vtn):
+        privateGatewayMac = vtn.privateGatewayMac
+        localManagementIp = vtn.localManagementIp
+        ovsdbPort = vtn.ovsdbPort
+        sshPort = vtn.sshPort
+        sshUser = vtn.sshUser
+        sshKeyFile = vtn.sshKeyFile
+        mgmtSubnetBits = vtn.mgmtSubnetBits
+        xosEndpoint = vtn.xosEndpoint
+        xosUser = vtn.xosUser
+        xosPassword = vtn.xosPassword
+
+        data = {
+            "apps" : {
+                "org.opencord.vtn" : {
+                    "cordvtn" : {
+                        "privateGatewayMac" : privateGatewayMac,
+                        "localManagementIp": localManagementIp,
+                        "ovsdbPort": ovsdbPort,
+                        "ssh": {
+                            "sshPort": sshPort,
+                            "sshUser": sshUser,
+                            "sshKeyFile": sshKeyFile
+                        },
+                        "xos": {
+                            "endpoint": xosEndpoint,
+                            "user": xosUser,
+                            "password": xosPassword
+                        },
+                        "publicGateways": [],
+                        "nodes" : []
+                    }
+                }
+            }
+        }
+
+        # Generate apps->org.opencord.vtn->cordvtn->openstack
+        controllers = Controller.objects.all()
+        if controllers:
+            controller = controllers[0]
+            keystone_server = controller.auth_url
+            user_name = controller.admin_user
+            tenant_name = controller.admin_tenant
+            password = controller.admin_password
+            openstack = {
+                "endpoint": keystone_server,
+                "tenant": tenant_name,
+                "user": user_name,
+                "password": password
+            }
+            data["apps"]["org.opencord.vtn"]["cordvtn"]["openstack"] = openstack
+
+        # Generate apps->org.opencord.vtn->cordvtn->nodes
+        nodes = Node.objects.all()
+        for node in nodes:
+            nodeip = socket.gethostbyname(node.name)
+
+            try:
+                bridgeId = self.get_node_tag(o, node, "bridgeId")
+                dataPlaneIntf = self.get_node_tag(o, node, "dataPlaneIntf")
+                dataPlaneIp = self.get_node_tag(o, node, "dataPlaneIp")
+            except:
+                logger.error("not adding node %s to the VTN configuration" % node.name)
+                continue
+
+            node_dict = {
+                "hostname": node.name,
+                "hostManagementIp": "%s/%s" % (nodeip, mgmtSubnetBits),
+                "bridgeId": bridgeId,
+                "dataPlaneIntf": dataPlaneIntf,
+                "dataPlaneIp": dataPlaneIp
+            }
+            data["apps"]["org.opencord.vtn"]["cordvtn"]["nodes"].append(node_dict)
+
+        # Generate apps->org.onosproject.cordvtn->cordvtn->publicGateways
+        # Pull the gateway information from vRouter
+        vrouters = VRouterService.get_service_objects().all()
+        if vrouters:
+            for gateway in vrouters[0].get_gateways():
+                gatewayIp = gateway['gateway_ip'].split('/',1)[0]
+                gatewayMac = gateway['gateway_mac']
+                gateway_dict = {
+                    "gatewayIp": gatewayIp,
+                    "gatewayMac": gatewayMac
+                }
+                data["apps"]["org.opencord.vtn"]["cordvtn"]["publicGateways"].append(gateway_dict)
+
+        return json.dumps(data, indent=4, sort_keys=True)
+
+    def call(self, **args):
+        vtn_service = VTNService.get_service_objects().all()
+        if not vtn_service:
+            raise Exception("No VTN Service")
+
+        vtn_service = vtn_service[0]
+
+        # Check for autogenerate attribute
+        netcfg = self.get_onos_netcfg(vtn_service)
+
+        tenants = self.get_tenants_who_want_config()
+        for tenant in tenants:
+            self.save_tenant_attribute(tenant, "rest_onos/v1/network/configuration/", netcfg)