This is an L3VPN service model. The service model help provision a service with multiple sites.
Each site would consist of WAN and LAN configurations.
The service model consists of three main files:
- Yang: This file represent the form data. The minimum input required by engineers to fill out to use the service.
- XML: These set of files represent the device variables that must be applied.
- Python: The python script manipualte the inputs from the yang before applying them to the XML templates.

Requirements:
- NSO version: 4.4
- Cisco-IOS NED version: 6.0.9
- Cisco-IOSXR NED version: 7.1
- Devices: 1 IOS, 1 IOSXR
- Python packages: ncs, netddr

To Compile the service model:
- cd src
- Run: make clean all

To load the service model:
- Navigate to: ncs_cli
- Run: Request packages reload

Sample Test Data:
{
  "/itential-l3vpn:l3vpn": [{
    "vpn-id": "4465",
    "vpn-name": "testingVPNName",
    "description": "testingDescription",
    "site": [{
      "site-id": "222",
      "ce": "ios0",
      "site-description": "testingSiteDescription",
      "lan-link": [{
        "lan-interface-name": "0/1",
        "lan-ip": "192.0.2.0/21",
        "lan-description": "testingLanDescription"
      }],
      "wan-link": [{
        "pe": "iosxr0",
        "pe-interface-name": "0/0/0/1",
        "vlan": "33",
        "pe-as-num": "234",
        "pe-router-ip": "192.0.2.0/21",
        "pe-ip": "192.0.2.0/21",
        "ce-wan-interface-name": "0/0",
        "ce-wan-ip": "192.0.2.0/21",
        "wan-description": "testingWanDescription"
      }]
    }]
  }]
}