Rick Donato

Introduction In the world of networking NetDevOps is one of the latest buzz words flying around. But what is NetDevOps, or even DevOps? In this 3-part series we will answer these questions, and also dive into a NetDevOps implementation using Ansible, Github, Jenkins and Cisco VIRL. Our example will be

What is NSoT? Network Source of Truth (NSoT) is a Django based opensource application for the management of IP addresses (IPAM), network devices and network interfaces. NSoT provides the following for the administration of the database inventory: * REST-based API * CLI client * Python modules * UI As you will shortly see the

What is property()? When reading Python code you may have seen the following: class MyClass(object): def __init__(self): pass @property def do_something(self): return True The purpose of this function is to create a property of a class. A property looks and acts like an ordinary attribute, except

What is VRF-Lite? VRF is a feature that allows you to create separate instances of the routing table. In turn allowing you to segregate and isolate different network types. When VRFs are used without MPLS it is classed as VRF-lite. VRF-lite configuration doesn’t need the route-target and can be

Introduction In order to reduce the amount of routing information within the routing table, routing summarization is used. Cisco IOS provides 3 types of BGP summarization: * Aggregate Address - BGP is configured to advertise an aggregate network via the aggregate-address command. * Manual - A summarized network is added to RIB

What is Port Security? By default Neutron enforces the following port security i.e. security on a per-port basis. Security Groups - All incoming and outgoing traffic is blocked for ports connected to virtual machine instances (unless a ‘Security Group’ has been applied).[1] Anti-Spoofing - As part of Neutron’

Introduction Within this tutorial, we will provide a beginner’s guide to subnetting. Before we dive into subnetting we will look into the structure of an IP address, along with some of the key IP schemes that assist in modern day IP subnetting. Note: The scope of this document covers

Introduction In this article we will look at threading vs multiprocessing within Python, and when you should use one over the other. TL;DR * What is the GIL (Global Interpreter Lock)? - Prevents more than 1 thread being run within a single CPython Interpreter/process. * Why do we need the

Introduction In this short article we will look into Python generators. A generator is, a function that returns an object (iterator) which we can iterate over (one value at a time).[1] Therefore, unlike lists, they are considered lazy. The key benefit to generators is that as they only produce