Ethan Banks On productivity.

CategoryHands On

Junos PyEZ Installation & Initial Testing on Mac OS X


I am educating myself about network automation. As I spend a lot of time in the Juniper world, a natural  place to work on automation skills is by leveraging PyEZ. What is PyEZ? Juniper describes it this way in their techwiki. Junos PyEZ is a microframework for Python that enables you to remotely manage and automate devices running Junos OS. In short, you get a bunch of classes you can act on in...

VMs Running In My ESXi Networking Lab as of 23-Dec-2014


Over the last several months, I’ve been building a lab full of virtual machines related to networking. I am using 2 independent ESXi hosts running vSphere 5.5 running on Haswell motherboards with 32GB of RAM, 256GB local SSDs, and a Synology DS1813+ for big, slow remote storage I access with NFS. You can read about my lab server build here. You might be wondering why I’m bothering...

Cisco VIRL ESXi Installation Notes


Note: I was part of the early VIRL beta program. For my efforts in that beta, I was provided a free one year subscription to VIRL, worth $199. I’ve got Cisco VIRL up and running on ESXi 5.5. The installation was mostly smooth, but there were some hurdles to overcome. Here are my installation notes while they are still fresh in my head. After purchasing VIRL, you have to wait to get a link...

Using Scapple To Help Manage Complex Network Changes


I’ve blogged about Scapple in the past, describing how I’ve been using Scapple to do basic network diagrams. If you are willing to give up some of the fancy features you get with an advanced diagramming tool like Visio or Omnigraffle, Scapple can take you reasonably far. In preparation for a recent change control, I found myself frustrated by the sheer volume of CLI code I was writing...

ThousandEyes Network Monitoring Use Cases


ThousandEyes is a network monitoring company who’s shining a light on the darkened portion of the network path you don’t own. Rather than the Internet appearing to an enterprise as a generic cloud where magic happens, ThousandEyes looks inside the cloud, revealing details about how your enterprise gets to remote services. For example, most network engineers know that when traffic leaves their...

How To Find A Lost Article In Google’s Cache


I had moment of confusion when a 1,200+ word analytical piece I’d written on HP networking utterly disappeared from my WordPress site. I still don’t know what happened. The piece was written, published, and linked all over social media. It was picking up page views immediately after publication. I’d seen some re-tweets and gotten some comments. I noticed on Saturday that the...

What is an Automatic Transfer Switch (Power)?


In response to the power redundancy article I wrote yesterday, a few comments came in. One of them (thanks, Mike!) mentioned an automatic transfer switch (ATS), a useful tool in a redundant power strategy. What is an ATS? There are many types of electrical transfer switches whose primary purpose is to divert the path of electricity from one source to another, some manually and some automatically...

Street Power vs. UPS Power In Redundant Power Supply Devices


A question came into the Packet Pushers mailbox along these lines. If a unit has two power inputs, should one go to UPS and one to street power, or is it better to have both power supplies fed by the same UPS? The issue with raw street power is that it isn’t conditioned. So, voltage and amperage irregularities might happen — events affecting the power grid can also affect whatever is...

Ethan Banks On productivity.

Most people know me because I write & podcast about IT on the Packet Pushers network. I also co-authored "Computer Networks Problems & Solutions" with Russ White.

Find out more on my about page.