Fredrik Holmberg

Network Consultant  

Author: Fredrik Holmberg (page 2 of 5)

Consulting Services


As requested you can now find information about my Consulting Services.

Get in touch if you’re interested in discussing business opportunities.

Have a nice day!

App troubleshooting using Wireshark

Remember those glory days when phones still had buttons? Before the selfie stick era. I used my phone to send SMS messages and call people. Browse the internet using WAP. Send a hi-def 320x240px picture now and then using MMS. The only pieces of software I had to deal with were the pre-installed stock applications (renamed to “apps” by Apple in 2008). All other internet activities had to be done on a computer.

Today, the phone is a touch screen that allow you to interact with apps. Everything is done through apps. We use them to buy tickets, share pictures with grandparents, access our bank account, post a picture of today’s dinner. So what happens when your favorite app stops working all of a sudden? How do you troubleshoot it?

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Connecting our Juniper lab to the world

A young Michael Caine doing Juniper labs.

A young Michael Caine enjoying Juniper labs.

Let’s say you have a Juniper EX switch that you want to connect to your new virtual lab. Maybe you’re training for the JNCIP-ENT. Maybe you need to verify reachability to a production network over an IPsec VPN tunnel. How do you connect your virtual Juniper lab to the world?

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On-demand Juniper labs using Vagrant

If you want user adoption, make your product easily accessible. Allow people to download it and start playing around. Provide study resources and hand out discounts to get people to start taking your certifications. Attract the engineers. Show how you can automate your infrastructure using Ansible. Get them hooked!

One of the first steps to start learning any platform is to set up a lab. Engineers want labs and Juniper want you to run as many virtual routers as you possibly can on your laptop. To make this as simple and streamlined as possible they provide you with their own pre-built Vagrant boxes. These boxes are tiny virtual machines that can run on top of different hypervisors.

In the following example I will show you how to manage the deployment and configuration of these boxes using Vagrant to set up a small Juniper lab.

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