fir3net
November 07, 2017

How do I add a Space to Selected Lines within VIM?

in Linux
Introduction Most likey there will be a time (for one reason or another) where you need to insert a number of spaces to a set of lines within a text file.Within this short article we will show you how via the use of VIM. Steps 1. Within VIM select blockwise visual mode, by pressing CTRL-V.2. Use the cursor keys to select the lines you want to add the spaces to.3. Then enter :'<,'> norm I .4. This…

Python - How to Obtain the Configuration of a Networking Device using NETCONF

in Protocols
Introduction Within this article we will look at how to interact with a networking device (Cisco CSR) using the NETCONF protocol. To do so, we will…

What is RESTCONF?

in Protocols
Introduction Following on from our previous article around NETCONF and YANG, we will look at the RESTCONF protocol. As per RFC 8040 (RESTCONF…

An Introduction to NETCONF/YANG

in Protocols
TL;DR NETCONF/YANG provides a standardized way to programmatically update and modify the configuration of a network device. To break this down…

How to Configure a Cisco CSR using NETCONF/YANG

in Concepts and Terminology
Introduction Within this tutorial we will use NETCONF and YANG to configure an interface upon a Cisco CSR router using a combination of Python and…

A Brief Explanation of Kernel Space and User Space

in Linux
Introduction Within the Linux kernel, knowing how memory is separated is extremely important. As knowing what programs reside where, and the…

vSRX on an Isolated Network - How do I Provision via Cloud-Init?

in OpenStack
Background Introduced within the Junos OS Release - 15.1X49-D100 - the vSRX now comes with cloud-init. As per Junipers configuration guide, ... the…

Troubleshooting Connectivity to the Neutron Metadata Proxy

in OpenStack
Introduction After troubleshooting a recent issue with accessing meta services from a guest instance, and jumping through the various steps within…

OpenStack Neutron - What is Port Security?

in OpenStack
What is Port Security? By default, Neutron enforces the following port security restrictions: Security Groups - All incoming and outgoing traffic is…

A Guide to Network Function Virtualization (NFV)

in Concepts and Terminology
Introduction NFV is a term that has been around for a few years now. As vendors and the open source communities look to drive the adoption of NFV, a…

OpenStack Partitioning - Regions, Availability Zones and Host Aggregates

in OpenStack
An OpenStack Cloud can be divided into three main hierarchical zones - Regions, Availability Zones and Host Aggregates. Regions A Region is full…