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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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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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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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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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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