Rick Donato

Introduction PIM (Protocol Independent Multicast) is a multicast routing protocol, that is used to send traffic from a single source to multiple destinations across a network. PIM is a collection of three protocols - PIM Sparse Mode, PIM Dense Mode and PIM Bi-directional .  PIM is termed protocol-independent because PIM does

Introduction Today, we will be walking you through the steps required to build an OpenStack Lab using Kolla-Ansible, based on the queens release. So what is Kolla-Ansible? In short, Kolla-Ansible is a highly customizable OpenStack project that is used to deploy OpenStack services and infrastructure components in Docker containers. Once

TL;DR BFD (Bi-Directional Forwarding Detection) is a highly efficient keepalive mechanism for routing protocols, that can detect link failures in milliseconds. Background As stated at http://brbccie.blogspot.com/, All routing protocols have some way of detecting failure, usually timer-related. Tuning the timers can theoretically get you sub-second failure

DPDK DPDK (Data Plane Development Kit) is a framework (under the Linux Foundation) comprised of various userspace libraries and drivers for fast packet processing[1]. Originally developed by Intel to run on x86 based CPUs, DPDK now supports other CPU types, such as IBM POWER and ARM. Though DPDK uses

SR-IOV (Single Root I/O Virtualization) is an extension to the PCI Express (PCIe) specification. Virtual Functions (VF) are created that act like a separate physical NIC for each VM; the VF in the NIC is then given a descriptor that tells it where the user space memory, owned by

Introduction Within this article we will look at some of the issues around the native (i.e no SR-IOV, DPDK etc) Linux datapath when moving a packet through a system, from NIC to a virtual instance. We will do so by tracing the path of a packet through the system.

Introduction Within this article, we answer the question - What is Segment Routing (SR)? But before we do we should first review MPLS, to understand the key benefits that SR brings. Let's go... MPLS Before looking at segment routing it's good to understand traditional MPLS. With

Introduction One of the key concerns when it comes to NFV is around performance, and that the network function you are virtualizing can deliver that of its hardware counterpart. However, with all the vendors competing to ensure their hardware based platforms are the fastest, through a range of dedicated based

Topology and Orchestration Specification for Cloud Applications (TOSCA), is an OASIS standard language to describe a topology of cloud based web services, their components, relationships, and the processes that manage them.[1] This in turn provides portability and agnostic automation management across cloud providers regardless of underlying platform or infrastructure.