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Network Engineering Foundations
This Learning Series covers the fundamentals of network engineering. Through hands-on labs and real-world examples, you will develop the practical skills necessary to build and maintain robust networks. It is perfect for aspiring network engineers, IT professionals, or anyone interested in understanding the backbone of today's interconnected world.
Cisco ACI Fundamentals Lab Part 1
This lab is the Cisco ACI Fundamentals Lab Part 1, and after completion, the student can launch Cisco ACI Fundamentals Lab Part 2 to complete the entire lab. The lab uses the ACI virtual simulator based on ACI Version 6, emulating an APIC, 2 leafs, and a spine. Part 2 uses a shared physical ACI fabric to complete the policy and verify data plane connectivity.
The ACI Virtual Simulator was needed to demo the building of the ACI fabric from scratch, bootstrapping the APIC, adding the spine and leafs, fabric discovery, and completing VMM integration. Since the Cisco ACI Fundamentals Lab, Part 2 is a shared on-demand environment, to decouple the APIC build process from the APIC policy creation. Due to limitations, the virtual ACI fabric is a control plane-only simulator, and no data plane testing (Ping, SSH) can get done for validation. Cisco ACI Fundamentals Lab Part 2 uses a Tenant inside of a physical ACI, and data plane functionality can get tested ( Ping, SSH)
Cisco Networking: Layer 2 Technologies
This Learning Series covers several key network engineering concepts, including VLANs and Trunks, EtherChannels, and Spanning Tree Protocol (STP). Through practical labs and real-world scenarios, you'll gain hands-on experience in configuring and managing resilient networks. The journey begins with VLANs and trunking, where you'll learn about network segmentation. Next, you'll explore EtherChannels to enhance link aggregation and redundancy. Finally, you'll master Spanning Tree Protocol to prevent network loops and optimize performance. Ideal for aspiring network engineers, IT professionals, or anyone looking to expand their knowledge of contemporary network infrastructure.
6 Steps to Understanding Cisco ACI
When understood, these six concepts will help anyone new to ACI to understand a more detailed technical discussion.
Understanding Data Center Quantized Congestion Notification (DCQCN)
RoCEv2 is a solution for achieving swift data throughput and minimal delay in modern data centers. It incorporates features like Priority Flow Control (PFC) and Explicit Congestion Notification (ECN) to establish a lossless network environment. PFC manages data flow at the interface level, while ECN detects and mitigates congestion before PFC activation becomes necessary. The combination of ECN and PFC, known as Data Center Quantized Congestion Notification (DCQCN), optimizes congestion management in RDMA networks. Careful tuning of queue thresholds is crucial to prevent hot spots and ensure low Job Completion Times (JCTs). The use of ECN and PFC is necessary for maintaining a lossless fabric in GPU-to-GPU communication during AI/ML training runs.
What's new
WWT at ONUG AI Networking Summit—Dallas 2025
At ONUG AI Networking Summit—Dallas 2025, WWT delivered fresh AI insights and real-world strategies that are reshaping networking, infrastructure and enterprise transformation.
The $2.3 Trillion Question: Why 84% of Digital Transformations Still Fail
Discover why most digital transformations struggle and learn practical strategies for success! This post explores how shifting from technology-first to business-first thinking can dramatically improve outcomes. Get actionable tips for aligning technology with real business needs and creating meaningful change that actually works.
From Cost Center to Strategic Enabler: Building the Business Case for NOC Modernization
In today's hyper-connected, always-on digital economy, businesses can no longer afford for their Network Operations Center (NOC) to be a passive, reactive function. What was once considered a cost center can now become a strategic enabler — one that drives uptime, customer and associate satisfaction, and competitive agility. NOC modernization isn't just a technical upgrade; it's a business imperative.
Hidden Infrastructure Demands of Enterprise AI
As AI pushes the limits of traditional IT infrastructure, enterprises are racing to modernize their data centers. In this episode, Mike Parham and Bruce Gray walk us through the behind-the-scenes decisions that matter — from power and cooling challenges to GPU readiness and sustainability. Whether you're modernizing or starting from scratch, this conversation is your blueprint for AI-ready infrastructure.
Day-2 Operations: The Critical Data Center Network Component
While Day 0 planning and Day 1 deployment capture initial attention, Day 2 operations—ongoing monitoring, automation, compliance and optimization—account for up to 70 percent of total data center network costs. Without a proactive strategy, enterprises face rising expenses, outages and security risks. To reduce TCO and improve resilience, organizations are adopting AI-driven and automated platforms like Arista CloudVision and Cisco Nexus Dashboard to streamline Day 2 tasks. Investing in visibility, operational simplicity and intelligent automation is now essential for long-term success.
Cisco Networking: Configuring OSPF
This configuration workbook lab is designed to provide learners with a comprehensive understanding of OSPF (Open Shortest Path First) routing in Cisco networks. Participants will learn to configure OSPF across multiple areas, implement OSPF neighbor relationships, and manage route summarization and redistribution. The lab will also explore advanced OSPF concepts such as stub areas, NSSA, and virtual links. By the end of the lab, learners will be able to validate OSPF operations using show commands and debug tools, ensuring proper route propagation and stable network convergence in real-world routing environments.
Assessing AI Workloads: How to Choose the Right Environment for Enterprise AI
Where should your AI workloads run? It's one of the most overlooked questions in AI strategy. From surprising constraints around power, cooling and floor space, to the growing demand for GPU-as-a-Service models, this episode delivers a field-level view of the challenges enterprises face when moving from AI proof of concept to production. You'll hear why infrastructure readiness assessments are essential, how AI workloads differ from traditional IT, and what to consider before buying that next GPU cluster.
MP-BGP EVPN VXLAN for the beginner
The article below covers VXLAN encapsulation and how MP-BGP is used to learn and forward layer two and layer three traffic across the encapsulation. To better understand the content, we recommended that readers have prior knowledge of BGP and the MP-BGP routing protocol. For those unfamiliar with these concepts, we suggest reading our foundational learning path's "MP-BGP for the beginner" article beforehand. It's important to note that MP-BGP EVPN VXLAN may initially seem intimidating, but this beginner's guide will clearly understand how it works. It's a technology that has gained popularity over the last few years, with many companies adopting it.
4 Benefits of a SaaS-Managed Data Center Fabrics: Cisco Nexus Hyperfabric
Cisco Nexus Hyperfabric is an innovative solution that integrates local switches with SaaS-based management. It is designed to be scalable, secure and simple to deploy.
Key Takeaways from the OFC 2025 Conference
Members of WWT's Core Networking Team share their key takeaways and insights from the Optical Fiber Communications Conference 2025.
The Future of Intent-based Networking and Multi-domain Architectures: Part II
The second in our series, this article explores what intent-based networking (IBN) is and how organizations can leverage it to build multi-domain architectures.
The Future of Intent-based Networking and Multi-domain Architectures: Part I
This series of articles will explore what intent-based networking (IBN) is and how organizations can leverage it to build multi-domain architectures. As more organizations embrace these architectures, WWT is seeing a change in networking the likes which haven't been seen in many years.
The Future of Intent-based Networking and Multi-domain Architectures: Part III
The last in a series of articles exploring intent-based networking, this article focuses on the art of the possible as it pertains to linking all the disparate SDN domains.
VMware NSX-T Virtual Lab
This is an On-Demand Lab for VMware NSX-T. It provides the same lab experience as the one day NSX-T training class but without the slide content and on-site architect. This lab is not meant to teach operations, best practices or replace VMware's hands-on classes.
Use the NEXUS Dashboard Free Trial to Proactively Monitor Your ACI Fabric
Learn how to create a 90-day POC to verify fabric performance, troubleshoot issues and validate the usefulness of the NEXUS Dashboard and day 2 operations suite.
Use the NEXUS Dashboard Free Trial to Proactively Monitor Your ACI Fabric (Part 2)
The second part in this white paper series illustrates the use cases for NEXUS Insight Application to proactively monitor and maintain your ACI fabric.
Cisco ACI Fundamentals Lab Walkthrough: Part 1
This playlist is recommended to be used in conjunction with part 1 of our Cisco ACI Fundamentals Lab using the Cisco ACI APIC simulator. These videos will show the students how to perform the labs in detail and answer any other questions not covered in the lab itself. The videos will cover: a tutorial on VXLAN 101 and ACI 101 basics, initial configuration of the APIC 5.0 controller via APIC console using the APIC simulator, APIC 5.0 switch Fabric Discovery via the registration process, APIC 5.0 GUI discovery, and Virtual Machine Manager (VMM) Networking. The Cisco ACI Part 2 Lab and playlist completes the learning by covering how to use a physical ACI fabric with a data plane for testing connectivity. Please be aware that the videos are based on ACI 5.x, and the lab is 6.1, so there will be some GUI differences. The content and configurations are the same and we will be updating the videos once we do a major upgrade to the labs.
Network Automation Maturity Model
Our Network Automation Maturity Model gives organizations a structured framework for moving from limited automation to a fully autonomous network. Discover where your organization stands today and the steps you can take to level up.
Aviz Announces SONiC PlugFest Results, Proving Quality, Standardization, Multi-Vendor Readiness, and Significant TCO Savings
Industry leaders unite vendors and users at PlugFest to test SONiC's scalability, interoperability and real-world deployment readiness.
Cisco Networking: Layer 2 Technologies
This Learning Series covers several key network engineering concepts, including VLANs and Trunks, EtherChannels, and Spanning Tree Protocol (STP). Through practical labs and real-world scenarios, you'll gain hands-on experience in configuring and managing resilient networks. The journey begins with VLANs and trunking, where you'll learn about network segmentation. Next, you'll explore EtherChannels to enhance link aggregation and redundancy. Finally, you'll master Spanning Tree Protocol to prevent network loops and optimize performance. Ideal for aspiring network engineers, IT professionals, or anyone looking to expand their knowledge of contemporary network infrastructure.