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Introduction Over the course of the last few entries, I documented my learning of Cumulus Linux, and how to do simple VXLAN with an EVPN control plane using their OS. All of this was done in a virtual environment on my server or my Mac laptop. One of the challenges of doing this in an actual network is the…
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Introduction Over the course of the last few weeks or so, I’ve been working with Cumulus Linux’s VX image on VirtualBox, on my Macbook Pro. As my virtual lab grew from a few VX images to the count of ten or so, my laptop began to complain. My laptop has a 4-core 2.8Ghz Core i7 with 16GB of RAM. …
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Introduction In the last few of my blog entries, I discussed setting up a virtual lab using Cumulus’ VX image for VirtualBox. I then went through and got EVPN working, and finally showed how using VXLAN, we can consider dumping MPLS for L2VPNs. This entry will focus on automating the bring-up of a new switch running Cumulus, and it’ll…
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Introduction In a previous entry, I described my thoughts on using VXLAN to replace MPLS for L2VPNs across a network. After reading through it, I decided to go back and re-do the configuration examples a bit, to make things a bit more like a backbone with several hops between the customer routers. This entry will outline those changes and…
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Introduction In a previous entry, I chronicled my self-education regarding Cumulus’ OS and how to do EVPN VXLAN with it. Throughout this entry, I’ll be referring back to that document, including some of the diagrams, configurations, etc. This entry will explain another use for VXLAN, and that’s running it instead of MPLS to handle L2VPNs across a network. That…
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Introduction State-tracking firewall devices are commonly deployed at the border of data centers, office networks, and other corporate environments where precious IP needs to be kept out of the hands of others. My opinion of these firewall devices is that they should be avoided at all costs, and I’ll get into that later. Sometimes we’re forced to deploy things…
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Introduction and Purpose Introduction Almost three years ago, I wrote this long and detailed post about building a VXLAN-enabled virtual lab on a KVM hypervisor, using Arista’s vEOS image. Prior to that, I also wrote up this post regarding the ideas around using VXLAN for spanning L2 across an L3 infrastructure. In the second post, I wrote about the…
This won’t be a large post at all; rather a quick follow up to a my first post on this topic. To summarize: If I have 1 4K/144Hz and 2 4K/60Hz displays connected to my NVidia Titan X Pascal card, each display works at its maximum refresh rate. If I connect a fourth display to the card, the 144Hz panel…
Introduction I play a lot of Ubisoft’s Rainbow Six: Siege online. I queue up with buddies sometimes, and other times I solo-queue. Sometimes I play Ranked, and other times I play Casual. Recently, there’s been a bad outbreak of cheating in Siege, and it’s hitting both Ranked and Casual. A lot of Siege Twitch streamers and YouTubers have openly and…
Good luck struck me recently and I was able to get my hands on the brand new Asus ROG Swift PG27UQ display. This 27″ LCD can do 4K at 144Hz and features NVidia’s GSync technology. It’s not an inexpensive display at $2000. Nor is it readily available yet. I was fortunate enough that my local Microcenter had six of them…