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Neworking Book s- Manuals  - Information for Design and Configuration

Introduction to Networking: Part 2, A Few More Basics (blog.scottlowe.org)

In part 1 of this series, I covered some networking basics (OSI and DoD models; layer 2 vs. layer 3; bridging, switching, and routing; Spanning Tree Protocol; and ARP and flooding). In this part, I’m going to build on those basic concepts to introduce a f ...
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Overlay Virtual Networks 101

My keynote speech @ PLNOG11 conference was focused on (surprise, surprise) overlay virtual networks and described the usual motley crew: The Annoying Problem, The Hated VLAN, The Overlay Unicorn, The Control-Plane Wisdom and The Ever-Skeptic Use Case. You ...
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Now available as Rough Cut - Networking for VMware Administrators

The Rough Cuts service from VMware Press gives you exclusive access to an evolving manuscript that you can read online or download as a PDF and print. A Rough Cuts book is not fully edited or completely formatted, but you'll get access to new versions as ...
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OpenFlow Fabric Controllers Are Light-years Away from Wireless Ones

When talking about OpenFlow and the whole idea of controller-based networking, people usually say “well, it’s nothing radically new, we’ve been using wireless controllers for years and they work well, so the OpenFlow ones will work as well.” Unfortunatel ...
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Design Considerations – Virtualized Datacenter Networking

When switching was introduced in Hypervisor Layer, inter VM switching started happening locally and there was no visibility from external network. Now let me introduce two very basic concepts and those are Access port and Trunk port in a Switch. ...
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LACP Primer – vSphere 5.5

LACP is a channel having two physical switches with a single link between. But hey what happens if we add a second physical link there? Oh yes, you will get a bridging loop. However switches have inbuilt mechanisms, which is here Spanning Tree Protocol, o ...
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Virtual Appliance Routing – Network Engineer’s Survival Guide

Routing protocols running on virtual appliances significantly increase the flexibility of virtual-to-physical network integration – you can easily move the whole application stack across subnets or data centers without changing the physical network config ...
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Gerlinde Brady CIS 146 Network Security Principles 03 14 2013 - YouTube 79:21

Teaches network security principles including firewall technologies,AAA, intrusion prevention, securing LANs, implementing VPNs,and managing secure networks.

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EtherChannel and Port Channel

In the networking world, you’ve no doubt heard the terms EtherChannel, port channel, LAG, MLAG, etc. These of course refer to taking multiple Ethernet connections and treating them as a single link. But one of the more confusing aspects I’ve run into is w ...
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Introduction to Networking: Part 1, The Basics

This is the kick-off to a series of posts introducing networking concepts to VMware administrators. Based on the feedback I’ve gotten in speaking to VMware admins, networking is an area in which a lot of VMware-focused folks aren’t particularly comfortabl ...
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Networking for VMware Administrators from VMware Press

Networking for VMware Administrators by VMware Press. This upcoming book is written by Chris Wahl and Steve Pantol. The book as you would expect by the title, focuses on networking, and is destined for VMware admins willing to learn more about networking. ...
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Richard Grotegut CNET 155A Network Fundamentals 09252012 - YouTube 127:35

This course introduces the architecture, structure, functions,components, and models of the Internet and other computernetworks. It uses the OSI and TCP layered models to examinethe nature and roles of protocols and services at theapplication, network, da ...
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Richard Grotegut CNET 155B Routing Protocols and Concepts 02162013 - YouTube 77:53

This course describes the architecture, components, andoperation of routers, and explains the principles of routing androuting protocols. Students analyze, configure, verify, andtroubleshoot the primary routing protocols RIPv1, RIPv2,EIGRP, and OSPF. By t ...
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Internetworking 101 series – Packets (Network Layer)

This is a series of posts designed to help readers understand how the Internet works.  This specific post looks directly at how machines on different network segments communicate. In my previous post, we looked at how two machines on the same networ ...
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Smart Fabrics Versus Overlay Virtual Networks

With the recent plethora of overlay networking startups and Cisco Live Dynamic Fabric Architecture announcements it’s time to revisit a blog post I wrote a bit more than a year ago, comparing virtual networks and voice technologies. They say a picture is ...
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Virtualize Cisco Routers with GNS3 (Virtual Foundry)

This title is a little misleading, I figure I get to do that at least once. Yes, GNS3, http://www.gns3.net, emulates the hardware of several Cisco router platforms, and it will boot real IOS images. It's also free, easy to install, and there are abundant ...
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Designing a Network Protocol

In this article, I look at constructing the communication protocol for a personal area network. The network consists of low-power nodes that capture physiological data from sensors and condition it before sending it to a central node for processing. In th ...
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What is a Distributed Firewall?

In the post “What is Network Virtualization?” I described a model where the application’s complete L2-L7 virtual network is decoupled from hardware and moved into a software abstraction layer for the express purpose of automation and business agility. In ...
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Top 7 Networking Concepts that every virtualization admin should understand

If you are working with virtualization technologies, you need to know networking, together with storage, Microsoft and VMware technologies. You need to be polyvalent. But the networking concepts are the base of all. To build a house, the foundations are o ...
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