Configuring Rancid

In my last post I talked about installing Rancid on Centos 7 so be sure to check that out. In this post we now want to actually use Rancid so I’ll walk through on how to setup Rancid to login into network equipment and get configurations. To recap: Rancid is a great tool to help monitor a device configuration for any changes. It also keeps track of them by using CVS (Concurrent Version System) for backups, so you can go back and compare versions or revert to a previous configuration. Rancid supports multiple hardware from Cisco, HP, Dell, Juniper and more. This is all open-source so you can create custom scripts or add commands to really make this a personal repository that fits your company. Continue reading

Some QoS Guidelines

When I started taking classes from the Cisco CCNA Discover books years ago, I remember for the first part of the book it talked about QoS and the theory behind it. To me QoS was a very interesting but after a chapter or two we never mentioned it again or really knew how to configure it. It seemed like it disappeared but it always something being tested on so we know it was there, somewhere… QoS can be a little boring and it does get a reputation of being difficult to understand, like where and how do I implement QoS? Most of the time QoS is not configured which causes applications to suffer in the end have an impact of end user performance. Throwing bandwidth to fix the problem is usually a costly risk, and remember you still may have the same performance problems. What also makes it interesting is you may have an environment that runs fine without QoS, so why do you need it? Well there’s no easy button to fix or find these unanswered questions about QoS. In this post I’m referencing guidelines of where to start looking which will hopefully help answer some of those unanswered questions. 🙂 Continue reading

GNS3 Alpha – Install and Setup

GNS3-logoSo Alpha 3 came out last week with a bunch updates and I decided to give it run this week. I’m not doing anything that difficult with the program so maybe I’m not breaking it in all the way but I also was looking at some installation notes for Ubuntu and other Linux flavors, I figured I’ll try to install it on a Windows machine and not Linux (call me lazy) feel free to follow this guide. Continue reading

Cisco Lab Setup

When it comes to learning and getting started with Cisco there are some tools that will help out a lot like Packet Tracer, GNS3 and other emulators. These are great tools for that “simulation” of hands on learning, but you can’t always stay in that area. I find it best to get hands on with “real” Cisco Gear and so with this post I’ll go through my current setup of what I have and ask that question when it is a good time to get a lab? Just because you may want to get a lab that does not guarantee you’ll actually learn and or pass.   Continue reading

What is the Nexus 1000v?

I have worked with the Nexus 1000v product and wanted to share my thoughts on it. I want to explain in this blog what this product is and what it does.  The Nexus 1000v can be virtual or a hardware appliance and is considered to be a virtual switch that runs in VMware. The major benefit to this product is the visibly you get when running in a virtual environment. Remember in the virtual environment the network engineer has a cloudy vision of what’s going, because the built-in switch within VMware does not get that technical it just works. This is fine for most people but not all, especially the network technicians we want that visibly and the Nexus 1000v does that and more! Continue reading