cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
222
Views
0
Helpful
0
Comments
lamarsh
Level 5
Level 5

Overview

CLI scripting is widely used in labs and production networks, but deploying using this old methodology can be challenging in complex infrastructures. This lab demonstrates how to overcome CLI scripting limitations by using YANG models in combination with Netconf or to derive software bindings in YANG Development Kit (YDK). Netconf/YANG enables you to install, manipulate, and delete network configuration and retrieve network status efficiently, at scale and with reliability. YDK enables developers to program the network as software objects instead of classic templating, which enables developers to fully utilize their programming skills. The lab uses Jupyter Notebook to demonstrate these points because it is the ideal tool to frame interactive, easy-to-follow software presentations and to customize for new use cases.

Check it out here: https://dcloud-cms.cisco.com/demo/practical-sp-programmability-v1

Scenarios

  • Scenario 1: Explore CLI Scripting
  • Scenario 2: Program the Network with Netconf/YANG
  • Scenario 3: Explore Network as Software with YDK

Requirements

RequiredOptional
  • Laptop with Cisco® AnyConnect®
  • Microsoft Remote Desktop

Components

  • Ubuntu Host
    • VirtualBox as a hypervisor to run XRv and Ubuntu client VMs
    • Vagrant to orchestrate VirtualBox
  • XRv 6.1.2
  • Ubuntu VM
    • Juptyer Notebook provides an interactive programmability presentation
  • PC Workstation
    • PuTTY with Ubuntu shortcut
    • Chrome to run Jupyter Notebook on Ubuntu VM

Features

CLI Scripting

Affected by many issues demonstrated in this lab, including:

  • Lack of transaction management
  • Lack of a common data model across platforms (or even from the same vendor)
  • Lack of proper version control for syntax and semantics
  • No structured error management
  • Ever-changing command structure and syntax
  • Fragile scripts that are costly to maintain
Netconf/YANG
  • Overcome issues affecting CLI scripting
  • YANG provides standardized network data models
  • Netconf complements the YANG model as a protocol designed to install, manipulate, and delete network configuration and retrieve network status
  • Netconf addresses transaction management and error handling
YDK
  • Program the network infrastructure as software object instead of templating
  • Provide API layer over Netconf/YANG with software binding compiled from YANG model
  • Provide client-side error handling based on YANG model syntax and semantic definitions
  • Enable developer to use software skills when programming the network

Topology

topo.jpg

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Quick Links