Tag Archives: switch

L2 Basics: Configuring an EtherChannel

Matt Schmitz/ January 30, 2018

Today we’re going to take a look at how to configure an etherchannel between two Cisco Switches. What is an etherchannel? It’s a way of taking multiple independent links and bundling them together, so that they appear as one logical connection between two devices. Etherchannels are commonly used between two switches, or between a switch and a host – which

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What’s wrong with VLAN 1?

Matt Schmitz/ December 5, 2017

Earlier this year I was involved in a string of interviews for an open network engineer position. The questions and scenarios provided during the interviews were aimed for someone mid-level. One of the more basic-ish scenario questions I like to ask is the following: Given a brand new switch, can you provide me the commands you would use to configure

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How to Improve: Stop Doing, Start Understanding

Matt Schmitz/ November 28, 2017

There is a key to being successful at just about any IT job: Stop just doing work, and start understanding what you’re doing. Might seem like an odd thing to say right? But this is something that I have seen confuse engineers at earlier points in their careers. In a lot of jobs, the initial training you receive is fairly

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Ten years of Cisco Certification

Matt Schmitz/ August 29, 2017

It’s August of 2017 – which means it’s been a long ten years since I originally obtained by CCNA certification in 2007. I figured it might be a good time to take a minute and look at what that has meant for me, and how the last ten years of my career have gone. When I got my CCNA certification,

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Odd Behavior of Protected Switchports

Matt Schmitz/ August 22, 2017

I ran into an interesting issue recently, which was caused by use of the switchport protected command…. So I use a pair of Cisco 2960-8TC-L switches at home, for both my home network and lab. A few months back I ran a bunch of ethernet cabling within my house, which all terminated in a patch panel in the basement. I was able

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Alright – Now What?

Matt Schmitz/ May 11, 2017

So it’s now been over two months since I finished college and obtained my magical piece of paper. It has been interesting to finally have some free time to do things that I want to do, and not having to constantly balance my time between school and work. So now that I’ve had a bit to sit back and take a break,

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Port Security: Worth the effort?

Matt Schmitz/ March 14, 2017

Port Security. Always seems like one of those things covered in Cisco exams, yet how many businesses actually use it? For those that aren’t implementing it, should they? Or is it too much of a headache? So the concept of port security is fairly simple – We want to secure each individual switch port to a physical layer 2 MAC

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Virtual Networking Contexts

Matt Schmitz/ February 21, 2017

I really want to take a moment to talk about how wonderful VRFs/firewall contexts really are. Both technologies essentially allow a network administrator to spin up a virtualized, isolated instance of a network device. I’ll be honest and say that I hadn’t had the chance to play much with this stuff until just recently – but it makes life a

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