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NEtwork MOdeling (NEMO)

This section describes how to use the NEMO feature in OpenDaylight and contains contains configuration, administration, and management sections for the feature.

Overview

With the network becoming more complicated, users and applications must handle more complex configurations to deploy new services. NEMO project aims to simplify the usage of network by providing a new intent northbound interface (NBI). Instead of tons of APIs, users/applications just need to describe their intent without caring about complex physical devices and implementation means. The intent will be translated into detailed configurations on the devices in the NEMO engine. A typical scenario is user just need to assign which nodes to implement an VPN, without considering which technique is used.

NEMO Engine Architecture

  • NEMO API * The NEMO API provide users the NEMO model, which guides users how to construct the instance of intent, and how to construct the instance of predefined types.
  • NEMO REST * The NEMO REST provides users REST APIs to access NEMO engine, that is, user could transmit the intent instance to NEMO engine through basic REST methods.

Installing NEMO engine

To install NEMO engine, download OpenDaylight and use the Karaf console to install the following feature:

odl-nemo-engine-ui

Administering or Managing NEMO Engine

After install features NEMO engine used, user could use NEMO to express his intent with NEMO UI or REST APIs in apidoc.

Go to http://{controller-ip}:8181/index.html. In this interface, user could go to NEMO UI, and use the tabs and input box to input intent, and see the state of intent deployment with the image.

Go to http://{controller-ip}:8181/apidoc/explorer/index.html. In this interface, user could REST methods “POST”, “PUT”,”GET” and “DELETE” to deploy intent or query the state of deployment.

Tutorials

Below are tutorials for NEMO Engine.

Using NEMO Engine

The purpose of the tutorial is to describe how to use use UI to deploy intent.

Overview

This tutorial will describe how to use the NEMO UI to check the operated resources, the steps to deploy service, and the ultimate state.

Prerequisites

To understand the tutorial well, we hope there are a physical or virtual network exist, and OpenDaylight with NEMO engine must be deployed in one host.

Target Environment

The intent expressed by NEMO model is depended on network resources, so user need to have enough resources to use, or else, the deployment of intent will fail.

Instructions

  • Run the OpenDaylight distribution and install odl-nemo-engine-ui from the Karaf console.
  • Go to http://{controller-ip}:8181/index.html, and sign in.
  • Go the NEMO UI interface. And Register a new user with user name, password, and tenant.
  • Check the existing resources to see if it is consistent with yours.
  • Deploy service with NEMO model by the create intent menu.