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Networklessons.com by Rene Molenaar - 3M ago

The tools we currently use to configure and monitor our networks, aren’t great for network automation. The command line interface (CLI) is great for us humans, but not so great for network automation. When you enter a command, there is no clear feedback. On Cisco IOS, you see an empty prompt when a command is […]

The post Device Programmability appeared first on NetworkLessons.com.

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The most common way for the last thirty years to configure our network devices is the command-line interface (CLI). The CLI is great for humans, not so great for computers. We use configuration commands to configure everything and show or debug commands to verify our work. The output of show (and debug) commands is formatted, […]

The post Data Models and Structures appeared first on NetworkLessons.com.

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Manually creating and launching VMs, containers, and network devices is not the way to go. There are three main reasons why you shouldn’t do this: It takes too much time. It’s easy to make errors. It’s not scalable. Instead, we should use network automation and orchestration tools. What is this about? Network automation, in it’s most […]

The post Network Automation and Orchestration appeared first on NetworkLessons.com.

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Networklessons.com by Rene Molenaar - 6M ago

In this lesson, we’ll take a look at different topics related to cloud connectivity: Cloud connectivity: the different options to connect to public cloud providers. SD-Access: Cisco’s SDN solution for enterprise campus networks. SD-WAN: the new software method to configure and manage WAN connections. Virtual switching: how we connect virtual machines and containers to the rest […]

The post Cloud Connectivity appeared first on NetworkLessons.com.

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A network function (NF) is a function that is performed by a physical appliance like a router, switch, firewall, load balancer, IDS, WAN optimizer, etc. Most vendors have proprietary solutions where hardware and software are tightly coupled. Cisco is a good example, they sell their routers and switches as appliances. You need the hardware and […]

The post Virtualization Functions (NFVI, VNF) appeared first on NetworkLessons.com.

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In this lesson, we’ll take a look at the differences between virtual machines and containers. Virtual Machines Back in the days, a physical server would only run a single operating system with one or a few applications. We started with CPUs with a single core, then hyperthreading, and then multiple cores. The amount of memory in […]

The post Compute Virtualization (Containers and Virtual machines) appeared first on NetworkLessons.com.

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Networklessons.com by Rene Molenaar - 6M ago

Migrating applications to the cloud require planning and research. In this lesson, we’ll take a look at five steps to migrate your on-premises workload to the cloud. Application discovery Our first step is to discover, analyze, and categorize your on-premises applications. Not all applications are suitable to migrate to a cloud environment. Here are some items you […]

The post Cloud Workload Migration appeared first on NetworkLessons.com.

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Cloud security is about securing the cloud and securing access to the cloud. In this lesson, we’ll look at security, implications, and policies of cloud computing. Shared Responsibility We have different cloud service models (IaaS, Paas, and SaaS). In these different service models, there is a shared responsibility. With the IaaS service model, the cloud provider […]

The post Cloud Security, Implications, and Policy appeared first on NetworkLessons.com.

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We often use Performance, Scalability, and High Availability interchangeably. There are however differences between these three items. In this lesson, we’ll look at their differences regarding the cloud. Performance Performance is the throughput of a system under a given workload for a specific time. For an application this could be: The time it takes for an […]

The post Cloud Performance, Scalability, and High Availability appeared first on NetworkLessons.com.

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Networklessons.com by Rene Molenaar - 6M ago

We often see the “as a service” terminology when we talk about cloud computing. The National Institute of Standards and Technology (NIST) describes three services models in their definition of cloud computing: Infrastructure as a Service (IaaS) Platform as a Service (PaaS) Software as a Service (SaaS) In this lesson, we’ll look at the different […]

The post Cloud Service Models appeared first on NetworkLessons.com.

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