diff --git a/apps/l3vpn/yangmodel/src/main/yang/ietf-network-instance@2016-06-23.yang b/apps/l3vpn/yangmodel/src/main/yang/ietf-network-instance@2016-06-23.yang
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+module ietf-network-instance {
+
+     yang-version "1";
+
+     // namespace
+     namespace "urn:ietf:params:xml:ns:yang:ietf-network-instance";
+
+     prefix "ni";
+
+     // import some basic types
+     import ietf-interfaces {
+       prefix if;
+     }
+
+     import ietf-ip {
+       prefix ip;
+     }
+
+     // meta
+     organization "IETF Routing Area Working Group (rtgwg)";
+
+     contact
+         "Routing Area Working Group - <rtgwg@ietf.org>";
+
+
+     description
+       "This module is used to support multiple network instances
+        within a single physical or virtual device.  Network
+        instances are commonly know as VRFs (virtual routing
+        and forwarding) and VSIs (virtual switching instances).";
+
+     revision "2016-06-23" {
+       description
+         "Initial revision.";
+       reference "RFC TBD";
+     }
+
+     // extension statements
+
+     feature bind-network-instance-name {
+       description
+         "Network Instance to which an interface instance is bound";
+     }
+
+     // identity statements
+
+     identity network-instance-type {
+         description
+            "Base identity from which identities describing
+             network instance types are derived.";
+     }
+
+      identity ipv4-interface-protocol-type {
+         description
+             "Base identity for derivation of IPv4 interface
+              protocols";
+      }
+
+      identity ipv6-interface-protocol-type {
+         description
+             "Base identity for derivation of IPv6 interface
+              protocols";
+      }
+
+     // typedef statements
+
+     // grouping statements
+
+     grouping interface-ip-common {
+       description
+         "interface-specific configuration for IP interfaces, IPv4 and
+         IPv6";
+
+     }
+
+     grouping ipv4-interface-protocols {
+         container ipv4-interface-protocols {
+             list ipv4-interface-protocol {
+                 key "type";
+                 leaf type {
+                     type identityref {
+                         base ipv4-interface-protocol-type;
+                     }
+                     mandatory true;
+                     description
+                         "ARP, ICMP, VRRP, DHCP Client, etc.";
+                 }
+                 description
+                     "List of IPv4 protocols configured
+                      on an interface";
+             }
+             description
+                 "Container for list of IPv4 protocols configured
+                   on an interface";
+         }
+         description
+             "Grouping for IPv4 protocols configured on an interface";
+     }
+
+     grouping ipv6-interface-protocols {
+         description
+             "Grouping for IPv6 protocols configured on
+              an interface.";
+         container ipv6-interface-protocols {
+             description
+                 "Container for list of IPv6 protocols configured
+                   on an interface.";
+             list ipv6-interface-protocol {
+                 key "type";
+                 description
+                     "List of IPv6 protocols configured
+                      on an interface";
+                 leaf type {
+                     type identityref {
+                         base ipv6-interface-protocol-type;
+                     }
+                     mandatory true;
+                     description
+                         "ND, ICMPv6, VRRP, DHCPv6 Client, etc.";
+                 }
+             }
+         }
+     }
+
+     grouping network-instance-policy {
+       description
+           "Network instance policies such as route
+            distinguisher, route targets, VPLS ID and neighbor,
+            Ethernet ID, etc. ";
+       reference
+           "RFC 4364 - BGP/MPLS Virtual Private Networks (VPNs)
+            RFC 6074 - Provisioning, Auto-Discovery, and Signaling
+                 in Layer 2 Virtual Private Networks (L2VPNs)
+            RFC 7432 - BGP MPLS-Based Ethernet VPN";
+       container network-instance-policy {
+           description "Network Instance Policy -- details TBD";
+       }
+     }
+
+     // top level device definition statements
+     container devices {
+         list device {
+             key deviceid;
+             leaf deviceid {
+                 type string;
+             }
+             container network-instances {
+                 description "Network instances each of which have
+                      and protocol instantiations. For layer 3,
+                      this consistent with the routing-instance
+                      definition in ietf-routing";
+                 reference "draft-ietf-netmod-routing-cfg";
+                 list network-instance {
+                     key name;
+                     description "List of network-instances";
+                     leaf name {
+                         type string;
+                         description "device scoped
+                              identifier for the network
+                              instance";
+                     }
+                     leaf type {
+                         type identityref {
+                             base network-instance-type;
+                         }
+                         description
+                             "The network instance type -- details TBD
+                              Likely types include core, L3-VRF, VPLS,
+                              L2-cross-connect, L2-VSI, etc.";
+                     }
+                     leaf enabled {
+                         type boolean;
+                         default "true";
+                         description
+                           "Flag indicating whether or not the network
+                            instance is enabled.";
+                     }
+                     leaf description {
+                         type string;
+                         description
+                           "Description of the network instance
+                           and its intended purpose";
+                     }
+                     uses network-instance-policy;
+                //     leaf root {
+                //       type schema-mount;
+                //       description "Root for models supported per
+                //                    network instance";
+                //     }
+                 }
+             }
+         }
+     }
+
+     // augment statements
+     augment "/if:devices/if:device/if:interfaces/if:interface" {
+       description
+           "Add a node for the identification of the logical network
+           instance (which is within the interface's identified logical
+           network element) associated with the IP information
+           configured on an interface";
+
+       leaf bind-network-instance-name {
+         type string;
+         description
+           "Network Instance to which an interface is bound";
+       }
+     }
+
+     augment "/if:devices/if:device/if:interfaces/if:interface/ip:ipv4" {
+       description
+           "Add a node for the identification of the logical
+           network instance (which is within the interface's
+           identified physical or virtual device) associated with
+           the IP information configured on an interface";
+
+       leaf bind-network-instance-name {
+         type string;
+         description
+           "Network Instance to which IPv4 interface is bound";
+
+       }
+     }
+
+     augment "/if:devices/if:device/if:interfaces/if:interface/ip:ipv6" {
+       description
+           "Add a node for the identification of the logical
+           network instance (which is within the interface's
+           identified physical or virtual device) associated with
+           the IP information configured on an interface";
+
+       leaf bind-network-instance-name {
+         type string;
+         description
+           "Network Instance to which IPv6 interface is bound";
+
+       }
+     }
+     // rpc statements
+     // notification statements
+   }
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