Campus network design: collapsed core
A description of three-tier and collapsed core network design for Cisco CCNP/CCDP students.…
Enabling DHCP Security on Juniper switches using ELS
Configuring DHCP Snooping, IP Source Guard, and Dynamic ARP Inspection is changed in the Juniper ELS syntax. This post explains how to do it.…
An oddly specific post about group_fwd_mask
A description of IEEE 802.1D MAC Bridge Filtered MAC Group Addresses, and how to get the Linux bridge to forward instead of filtering these link-local multicast frames.…
Playing around with Wistar
Wistar is a tool to easily create networking labs with Juniper equipment. In this post I explore Wistar, recommend some images to use, and tinker with the tool to make LLDP and LACP work by using the EVE-NG kernel.…
Insights from the NetDevOps Fall 2016 Survey
For my bachelor's thesis I've been doing research into DevOps and how it would apply to our network operations team. We were just starting on our journey to automate everything, and some of the questions I had were: What tasks do network operators generally automate first? What tools do most…
Running ESXi nodes in EVE-NG
If you're like me and are curious enough to check EVE-NG under the hood, you might have noticed that there is a template for VMware ESXi, but it's not listed as supported and is in fact hidden by default. However, if you're willing to tinker a bit, it is possible…
EVE-NG preview released
On January 1st the UnetLab team has released the first preview of EVE-NG. EVE (or formally: "Emulated Virtual Environment") is the successor to UnetLab. For those of you that don't know what UnetLab is: it's a piece of software that you can use to emulate network equipment, much…