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  • Spine and Leaf Networks, an Introduction

    calendar Apr 21, 2019 · 7 min read · Datacenter Networking Routing & Switching Studies  ·
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    The two biggest problems a network engineer will face are changes and loops In our Cisco exams, an overwhelming majority of the educational content is on methods of preventing loops, and for good reason. Unfortunately, the methods we use to prevent loops are highly complex - and if we partially understand these …


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  • Traditional Datacenter Network, a Preamble to Spine-and-Leaf

    calendar Apr 21, 2019 · 6 min read · Datacenter Networking Spine and Leaf Routing & Switching Studies  ·
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    Datacenter Network Engineers have two problems: CHANGE LOOPS (let's cover this one later!) Change is everywhere. Emerging trends such as DevOps and/or CI/CD have created the need for dynamic, ephemeral allocation of data center resources; not only in large-scale deployments, but medium-sized companies are starting down …


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  • Forward Error Correction, a story about Generation 14 PowerEdge and 25 Gigabit connectivity

    calendar Mar 15, 2019 · 3 min read · 802.3by VMWare Layer 1 Routing & Switching Studies  ·
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    25 Gigabit implementations First of all - anyone who assumes they think Layer 1 is simple is wrong. That being said, 25G/50/100G/QSFP28 services are different beyond simply being 2.5x faster than 10G. 802.3by (or 25 Gig for those who use it): Full-Duplex is mandatory. Energy Efficient Operation Stackable Lanes …


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  • Running a serial console server over ESXi

    calendar Mar 3, 2019 · 4 min read · VMWare FOSS/Linux Routing & Switching Studies  ·
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    Since I'm building a hybrid systems/networking lab, one of the key features I'll need is a serial console server to administer the lab switches. There are a few options here: Find an old Cisco Router and some async octal cables (Rare, takes up rack space) Purchase a serial console server like MRV, Perle, …


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  • My Home Lab!

    calendar Feb 24, 2019 · 1 min read · VMWare Home Lab Network Security Routing & Switching Studies NSX-T  ·
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    I've removed NSX-V 6.4.4, and am about to start some more datacenter/route-switch projects - this is the lab network diagram for reference: And, the meatspace version - the cheetos are there in case of an emergency:


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ENGYAK.co

A blog about IT

Disclaimer

The opinions expressed on this site are my own personal opinions and do not represent my employer’s view in any way.

Recent Posts

  • Automate Cisco IOS/IOS-XE documentation with Ansible (with examples)
  • Document Networks as Code with D2!
  • Document vSphere as Code with D2!
  • Diagram as Code with D2!
  • Enable ToFU (Trust on First Use) with OpenSSH
  • Deploy vSphere VMs with Ansible!
  • Why Automate? VM Deployment with vSphere's REST API
  • What happens to packets with a VMware vSphere Distributed Switch?

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