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Posts by: Chris Marshall

Cisco Router & Switch Change Control Tip – Use Local Account with Dedicated VTY line

Hello loyal LP blog cats. In this week’s quick post, I’m going to show you a tactic I use to ensure that you never lock yourself out while making changes to a Cisco router or switch configurations.

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OTV will set you free

That title is not true, but I just could not come up with a better one. I like rhyming phrases I guess.

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Cisco IOS/IOS-XE Local Password Authentication Best Practices

Hello loyal blog readers. Over the last few weeks I have been busy working on a network assessment for one of our fantastic customers. One of the areas we look at when assessing a customer’s network is how they are protecting/restricting access to the management plane of their network infrastructure.

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Cisco SD-WAN Series Part 5b – cEdge Branch Site Integration Designs

This blog follows on from my last post and continues the discussion on how to integrate a single/pair of SD-WAN routers into our existing branch site topology. If you missed that last blog, then you can check it out here. Don’t worry I’ll be right here waiting for you.

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Cisco SD-WAN Series Part 5a – cEdge Branch Site Integration Designs

In this edition of our SD-WAN series I’m going to take a step away from our lab environment and attempt to address a question I get a lot from our customers. “How do we integrate a SD-WAN router or pair of SD-WAN routers into our current environment?” Well the answer I’m afraid is the networking consultants classic line of “It depends”. And it really does, Cisco’s SD-WAN solution was created by engineers with a background in routing and this routing foundation really gives us a lot of flexibility when positioning our SD-WAN routers into our existing environment.

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Cisco SD-WAN Series Part 4 – Overlay Management Protocol (OMP)

In my last post we looked at the steps that a vEdge goes through to bring up its control plane connections and authenticate itself onto the fabric. In this post we will follow on from where we left off and see how we use these control plane connections to exchange topology information, WAN policies and security keys via OMP.

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Cisco SD-WAN Series Part 3 – vEdge Router Bringup Sequence of Events.

Hello, my loyal blog post readers, in this my third installment of our SD-WAN series I am going to walk you through how our vEdge router locates, communicates and authenticates itself onto our SD-WAN fabric. Along the way we will take a look at a few packets captures and command line output to see what is going on under the hood.

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Cisco SD-WAN Series Part 2 – Lab Setup

In my last post in the series I introduced you to the four architectural components that control and enable our SD-WAN fabric. In that post I had promised that in our next installment we would take a closer look at our fabric bring up sequence, but if you will indulge me I would like to hold off on that topic for the next post. In its place I would like to use this post to introduce you to the lab environment that I have built for this series and take you through the process of deploying and registering a virtual vEdge router into our lab.

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Cisco SD-WAN Series Part 1 – Architecture Components

Over the past year I have been fortunate enough to work on several Cisco SD-WAN (formally Viptela) deployments. These projects have ranged from small three or four site implementations here in the bay area, right through to large scale international rollouts incorporating hundreds of sites spread-out across the globe with regional POPs providing branch services and backbone connectivity.

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Cloud-Central Telemetry & Analytics

Last year, the hot topic taking over the IT space was Software Defined Wide Area Network, or SD-WAN. It simplifies WAN management, connects enterprise networks, and provides aggregation of WAN bandwidth, centralized control and policy enforcement, and visibility into network traffic.

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