Episodes
How Network Slicing Creates Dedicated Digital Highways
Network slicing transforms the physical internet into multiple virtual networks, each optimized for specific performance needs. This episode examines how operators are using this technology to guarantee low latency for autonomous vehicles and ultra-reliable connections for remote surgery, moving beyond best-effort delivery to engineered certainty. #NetworkSlicing #5GInfrastructure #FexingoBusiness #BusinessPodcast #TelecomTech #Virtualization #LatencyOptimization #EdgeComputing…
Why Your Network Drops Packets Under Load
We look at the hidden mechanics of packet loss and why it matters more than bandwidth. Using a specific case from September 2026, we explain how bufferbloat and queue management affect your daily internet experience. Lucas and Luna break down the engineering decisions that keep your video calls clear and your downloads fast. This episode explores the trade-offs between latency and throughput in modern network design. #NetworkEngineering #PacketLoss #Bufferbloat #QoS #InternetInfrastructure…
How Border Gateway Protocol Reshapes Internet Traffic
The internet does not have a central traffic controller. It runs on Border Gateway Protocol, a system designed for trust in the nineties that now carries the weight of global commerce. In this episode, we look at how autonomous systems negotiate paths and why the lack of standardized validation makes routing decisions opaque. We trace the mechanics of route announcement and examine what happens when connectivity relies on manual configuration rather than automated intent. The discussion covers…
How The Internet Breaks Under Its Own Weight
Most people assume the internet is infinitely scalable, but physical constraints tell a different story. This episode examines how fiber optic latency limits and the speed of light create hard ceilings for global finance and cloud architecture. We look at why high-frequency trading firms spend millions to shorten cable routes and how network engineers are redesigning core infrastructure to fight physics rather than just software bugs. If you think your remote meeting lag is an ISP problem, this…
How Dark Fiber Is Reshaping Cloud Economics
In this episode of Networking Tech with Fexingo, Lucas and Luna explore the hidden economics of dark fiber — the unlit cables that form the backbone of modern cloud infrastructure. With data centers in Northern Virginia and Ashburn now competing for physical proximity, we look at how leasing dark fiber instead of buying lit services gives hyperscalers like Microsoft and Amazon a strategic edge in latency and cost control. We break down the specific financial mechanics: why a single strand of…
The Hidden Cost of Internet Peering and Traffic Exchange
Most people think internet traffic flows freely, but a complex web of private agreements dictates who pays whom. This episode explores the economics of peering, focusing on the controversial 'tiered' system where large content providers like Netflix and Google pay transit providers for direct access to end-users. We break down the difference between settlement-free peering and paid transit, examining how this financial architecture shapes global latency and costs. By looking at specific…
How IP Address Exhaustion Drives Cloud Architecture
With global IPv4 addresses fully allocated since 2019, network engineers are no longer just managing scarcity—they are redesigning the core of internet infrastructure. This episode examines how Carrier-Grade NAT and dual-stack deployments have fundamentally altered cloud connectivity and latency. We look at the specific engineering trade-offs in modern data centers, where saving a single IPv4 block can mean millions in hardware savings but introduces complexity that impacts application…
How BGP Hijacks Still Happen and What We Can Do
Despite years of security upgrades like RPKI, Border Gateway Protocol hijacks remain a persistent threat to global internet routing. This episode examines the mechanics behind recent hijack attempts, why automated validation hasn't fully solved the problem, and what network engineers are doing to detect anomalies in real-time. We look at specific cases where traffic was misdirected, the economic incentives driving these attacks, and the technical limitations of current monitoring tools. Lucas…
How The Internet Routes Around Black Holes
We explore the hidden mechanics of black hole routing and how network engineers use unnumbered links to stabilize core infrastructure. This episode breaks down why IP addresses aren't always necessary for reliable connectivity, focusing on the engineering trade-offs between simplicity and visibility in modern data centers and ISP backbones. #NetworkEngineering #InternetInfrastructure #BlackHoleRouting #UnnumberedLinks #ISPBackbone #DataCenterDesign #RoutingProtocols #NetworkResilience…
How The Internet's Physical Cables Decide Your Latency
We explore the physical layer of internet infrastructure, specifically how undersea cable geography and fiber optic attenuation dictate global latency. Lucas and Luna break down why your data takes a specific path through the Atlantic, the role of submarine repeaters, and how network engineers optimize routing based on physical distance rather than just logical hops. We examine the real-world constraints of signal degradation and how modern engineering mitigates these issues to keep cloud…
The Hidden Cost of IPv4 Exhaustion
We explore how the exhaustion of IPv4 addresses has forced a massive, invisible shift in global internet infrastructure. With the primary pool officially depleted years ago, organizations now rely on Carrier-Grade NAT and complex translation layers to connect billions of devices. We break down the technical reality of IP address scarcity, why companies like Cloudflare are pushing for faster IPv6 adoption, and what this means for network engineers managing hybrid environments today. It is not…
How Optical Networking Is Saving The Cloud
Cloud providers are hitting a physical wall: copper cables can no longer carry data fast enough across data centers. This episode explores how major hyperscalers are pivoting to optical networking, using coherent optics and silicon photonics to boost bandwidth without laying more fiber. We look at the engineering trade-offs of replacing electrical interconnects with light-based solutions, the cost per bit advantages, and why this shift is critical for sustaining the exponential growth of…
How Network Slicing Is Reshaping the Internet
In this episode, Lucas and Luna dive into network slicing—the technology that lets ISPs carve a single physical network into multiple virtual ones, each with its own guaranteed performance. They use the example of a 5G network operator slicing bandwidth for autonomous vehicles, emergency services, and video streaming, showing how this is starting to reshape internet infrastructure. The conversation covers the basics of how slicing works, the role of software-defined networking and network…
How Segment Routing Is Reshaping the Internet's Core
The internet's routing table is growing at an unsustainable rate, and network engineers are turning to segment routing to keep the core from buckling under its own complexity. In this episode, hosts Lucas and Luna dig into the specific problem: the default-free zone, where the internet's backbone routers hold over a million routes, and how segment routing's source-based path selection is shifting the intelligence away from the core. They walk through a real-world migration at a tier-one…
How Segment Routing Is Simplifying Network Operations
In this episode of Networking Tech with Fexingo, Lucas and Luna dive into segment routing and how it's changing the way network engineers design and operate large-scale IP networks. They use a real-world example of a global content delivery network that adopted segment routing to improve traffic engineering, reduce operational complexity, and cut down on manual configuration. The conversation covers the shift from traditional MPLS to segment routing, the role of SR-MPLS and SRv6, and how the…
How Ethernet Is Winning the Battle Against InfiniBand
In this episode of Networking Tech, Lucas and Luna dive into the surprising resurgence of Ethernet in high-performance computing, where InfiniBand has long held the crown. They explore how the rise of AI training clusters has forced Ethernet vendors to innovate, closing the latency and throughput gap. The conversation centers on NVIDIA's decision to offer Ethernet as an alternative to InfiniBand for AI networking, the role of the Ultra Ethernet Consortium, and the key technical advances—like…
How DNS Anycast Is Reshaping Global Internet Resilience
In this episode of Networking Tech with Fexingo, Lucas and Luna explore how DNS anycast has quietly become one of the internet's most critical reliability mechanisms. They break down the mechanics of anycast — how a single IP address can be served from multiple locations — and walk through a concrete example: what happens when you type a simple domain name and your request gets routed to the nearest available server. They discuss how anycast improves latency and resilience, why it’s not just…
How Ethernet Is Winning the Battle Against InfiniBand
In the race to build faster data centers, Ethernet and InfiniBand have been locked in a decades-long tug-of-war. But as AI training clusters demand unprecedented bandwidth, Ethernet is quietly pulling ahead. We look at the Ultra Ethernet Consortium — formed in July 2023 by AMD, Arista, Broadcom, Cisco, and others — and its push to make Ethernet the fabric of choice for scale-up and scale-out AI workloads. We break down why InfiniBand had an edge with its lossless, low-latency design, and how…
How Network Automation Is Changing Network Engineering Jobs
Network automation is transforming the job of the network engineer. In this episode, Lucas and Luna explore how the shift from manual CLI configuration to software-defined networking is changing the skills, roles, and career paths of the people who run the internet's plumbing. They look at the rise of platform engineering, the growing importance of software skills, and what it means for the next generation of network professionals. With specific examples from the industry, they discuss how…
How Latency-Based Routing Shapes Global Internet Performance
In episode 164 of Networking Tech with Fexingo, Lucas and Luna explore how latency-based routing is quietly reshaping global internet performance. They dig into the mechanics behind anycast, BGP tuning, and real-world examples like Cloudflare and Google's global load balancing. You'll learn why a few milliseconds matter for financial trading, gaming, and video calls, and how network engineers use latency measurements to route traffic around congestion. The hosts also discuss the trade-offs…
How Network Automation Is Reshaping the Data Center
In this episode of Networking Tech, Lucas and Luna explore how network automation is transforming data center operations, moving beyond the CLI to intent-based and policy-driven management. They drill into a real-world case: a global financial firm's rollout of automated network provisioning that cut deployment time from weeks to under an hour. They discuss the role of APIs, YANG models, and telemetry, and why some engineers fear automation is a threat to their jobs. The conversation also…
How BGP Wedgies Expose the Internet's Fragile Routing
In this episode of Networking Tech with Fexingo, Lucas and Luna dig into a surprisingly common but little-known internet failure mode: the BGP wedgie. They walk through a realistic example where two networks' routing policies lock each other into a black hole, explain why the internet doesn't just heal itself, and reveal how operators are using route flapping, path hunting, and automated mitigation to climb out of these holes faster. If you've ever wondered why your traffic disappears for…
How Segment Routing Makes the Internet More Resilient
In episode 161 of Networking Tech with Fexingo, Lucas and Luna dig into the mechanics of segment routing, focusing on how it's changing network resilience. They explore the difference between traditional hop-by-hop routing and source-based path selection, using the analogy of a road trip with a pre-planned route versus relying on gas station attendants. The conversation covers real-world benefits like fast reroute, path redundancy, and simpler operations, and touches on how segment routing…
How BGP Is Evolving with SRv6 and Network Slicing
In this episode of Networking Tech with Fexingo, Lucas and Luna explore the next big evolution in internet routing: the transition from MPLS-based segment routing to SRv6, and how this shift is enabling new capabilities like network slicing. They discuss the practical benefits of SRv6 for operators, including simplified operations and better support for 5G and edge computing, while also addressing the challenges of adoption, such as the need for hardware upgrades and the security considerations…
How BGP Is Becoming More Secure with RPKI
In this episode of Networking Tech with Fexingo, Lucas and Luna explore the internet's trust problem: BGP, the protocol that routes traffic across the globe, was designed for a trusted network, but route hijacks and leaks have become a daily threat. They focus on Resource Public Key Infrastructure (RPKI), a cryptographic framework that lets network operators sign their route announcements, and the adoption curve that's been accelerating since major incidents like the 2018 Amazon hijack. Lucas…
How BGP Flowspec Is Stopping DDoS Attacks
In this episode of Networking Tech with Fexingo, Lucas and Luna break down BGP Flowspec, a technology that's quietly changing how network operators defend against DDoS attacks. They explain how Flowspec works, why it's more precise than traditional RTBH, and how it's being deployed at scale by ISPs and large enterprises. With a concrete example from a Tier 1 provider handling a multi-terabit attack, the hosts walk through the setup, the limitations, and the future of this protocol. If you've…
How Network Verification Prevents Outages Before They Happen
Network outages cost millions and erode trust. But what if you could prove your network will work before you touch it? In this episode, Lucas and Luna explore the rise of network verification — the practice of mathematically proving that routing and configuration changes won't break your network. They dig into how companies like Amazon and Microsoft use formal methods to check BGP policies and firewall rules, and how tools like Batfish are bringing verification to the masses. They discuss…
Why BGP Is Moving to Segment Routing
As BGP struggles with the Internet's growing complexity, network operators are increasingly turning to Segment Routing to simplify traffic engineering and improve resilience. In this episode, Lucas and Luna explore how Segment Routing MPLS (SR-MPLS) and Segment Routing over IPv6 (SRv6) are being adopted by major service providers and cloud operators. They break down a concrete example of a large content delivery network that halved its BGP table size by using SR-MPLS, and discuss what this…
How BGP Communities Are Rewiring Internet Routing
In episode 155 of Networking Tech with Fexingo, Lucas and Luna dig into the quiet workhorse of internet routing: BGP communities. These 32-bit tags attached to routing prefixes let network operators signal everything from geographic location to route preference without rewriting global routing tables. The hosts walk through how a misconfigured community can accidentally hijack traffic (remember the 2018 Amazon Route 53 incident?), how communities enable fine-grained traffic engineering that…
How BGP Is Adapting to the Internet's Growing Complexity
Border Gateway Protocol, the glue of the global internet, is under pressure from route leaks, hijacks, and the sheer scale of modern networks. In this episode, Lucas and Luna explore how operators are fighting back with RPKI, BGPsec, and new operational practices. They break down why the internet's routing table keeps growing, what that means for resilience, and why every network engineer should care about path validation. Learn why RPKI adoption is accelerating, the limits of BGPsec, and how…
How BGP Is Tackling Route Leaks and Hijacks
In this episode of Networking Tech, Lucas and Luna drill into the internet's most fragile point: the Border Gateway Protocol. They explain why BGP, a protocol from the 1980s, still underpins global routing, and how the industry is finally fighting back against route leaks and hijacks. With recent high-profile incidents still fresh, they walk through real-world examples like the 2008 YouTube hijack and the 2024 AS7007 cascade, then unpack the practical fixes: RPKI, BGPsec, and the role of major…
How BGP Is Handling the Internet's Growing Complexity
In this episode of Networking Tech with Fexingo, Lucas and Luna dig into the Border Gateway Protocol — the glue that holds the internet together — and why it's struggling under the weight of modern complexity. They explore real-world cases like the 2021 Facebook outage and the 2017 Google route leak, breaking down how BGP's trust-based design creates vulnerabilities and how operators are fighting back with RPKI and BGPsec. They also look at how the rise of AI data centers and edge computing is…
How Disaggregation Is Breaking the Black Box Network
In this episode, Lucas and Luna explore the quiet revolution of network disaggregation — why operators are moving away from monolithic switches and routers toward open hardware and independent operating systems. They start with a concrete example: a cloud-scale operator that swapped a proprietary stack for white-box switches running open source software, cutting per-port cost by half. From there they dig into the practical math — what changes when you buy hardware from one vendor and software…
How Network Telemetry Is Changing the Way We See the Internet
In the 150th episode of Networking Tech, Lucas and Luna dive into the explosion of network telemetry data and how it's transforming visibility, troubleshooting, and operations. They explore the shift from polling-based monitoring to streaming telemetry, the role of standards like gNMI and OpenConfig, and how a major cloud provider uses this data to predict failures before they happen. They also discuss the challenges of handling petabytes of data and the rise of AI-driven analytics. With a…
How Network Automation Is Killing the CLI
In this episode of Networking Tech with Fexingo, Lucas and Luna explore how network automation is fundamentally changing the way engineers interact with network devices. They trace the evolution from the command-line interface to modern automation frameworks, using real-world examples like the shift from manual router configuration to automated deployment at scale. The conversation highlights the rise of intent-based networking, the role of APIs, and the new skills required for network…
How Segment Routing Policy Is Changing Traffic Engineering
In this episode, Lucas and Luna dive into Segment Routing Policy, the technology that gives network operators a programmable, centralized way to steer traffic with a simple list of instructions embedded in the packet. They explain how it builds on the earlier Segment Routing MPLS episode, but with a fresh focus on the policy layer — the brain that decides which path a packet should take, and how it's enforced across large, distributed networks. They walk through a concrete example: how a large…
How Segment Routing Improves Network Resilience
In this episode of Networking Tech with Fexingo, Lucas and Luna explore how segment routing is changing the way networks recover from failures. They dive into a real-world case: a major European ISP that deployed segment routing to cut failover times from seconds to milliseconds. The conversation covers the basics of segment routing, how it improves on traditional MPLS, and why it's becoming a key tool for network resilience. They also touch on the role of SRv6 and how operators are using it to…
How Network Slicing Powers 5G to the Edge
In this episode of Networking Tech with Fexingo, Lucas and Luna dive into network slicing, the technology that lets carriers carve a single physical network into multiple virtual networks, each tuned for a specific use case. They explore how a mobile operator can guarantee low latency for autonomous vehicles while simultaneously delivering high bandwidth for video streaming, all over the same infrastructure. Lucas explains the role of SDN and NFV in making slicing possible, and the two discuss…
Why Network Operators Are Adopting Segment Routing MPLS
In this episode of Networking Tech with Fexingo, Lucas and Luna explore why network operators are increasingly turning to Segment Routing MPLS (SR-MPLS) to simplify traffic engineering and automate path control. They start with a concrete example: a Tier-1 operator using SR-MPLS to steer traffic around a congested link in real time, avoiding expensive link upgrades. The conversation dives into how SR-MPLS replaces complex LDP and RSVP-TE protocols with a single label stack, making networks more…
Why Network Operators Are Adopting Time-Sensitive Networking
In this episode of Networking Tech with Fexingo, Lucas and Luna explore why time-sensitive networking (TSN) is moving from the factory floor into the data center and even the internet edge. They focus on a real-world case: how a financial exchange in Europe deployed TSN over standard Ethernet to guarantee microsecond-level latency for trading traffic, sidestepping the cost of proprietary hardware. The conversation breaks down IEEE 802.1Qbv time-aware shapers, the role of precision time…
Why Deterministic Networking Is the Next Big Leap for the Internet
In this episode of Networking Tech, Lucas and Luna explore deterministic networking — the effort to guarantee latency and jitter bounds over IP networks, not just best-effort delivery. They anchor the discussion in the IEEE 802.1 TSN standards and the IETF's DetNet working group, and they get concrete with a real-world case: a robotic control system in a smart factory where a delayed packet can halt a production line. The hosts explain how deterministic networking works, why it's becoming…
How Intent-Based Networking Is Transforming Network Operations
In this episode of Networking Tech with Fexingo, Lucas and Luna explore how intent-based networking (IBN) is shifting network operations from manual, device-level configuration to a declarative model where operators specify business intent and the network figures out the implementation. They discuss real-world examples, the role of AI and machine learning, the challenges of adoption, and what it means for network engineers. Tune in to understand how IBN can reduce human error, improve security…
How Network Automation Is Killing the CLI
In Episode 141 of Networking Tech with Fexingo, Lucas and Luna explore how the command-line interface is losing its grip on network engineering. They trace the shift from manual CLI choreography to intent-based automation, using the example of a large retail chain that cut change-window times from hours to minutes by moving to a controller-based model with YANG data models and NETCONF. The conversation digs into why the CLI became the default in the first place, what automation actually solves…
How RoCEv2 Enables GPU-to-GPU Communication in AI Data Centers
Network engineers are at the center of a quiet revolution: AI training clusters now demand RDMA over Converged Ethernet (RoCEv2) for GPU-to-GPU communication at 400 Gbps per port. This episode breaks down how RoCEv2 bypasses the kernel to achieve microsecond latencies, why it requires lossless Ethernet fabrics with Priority Flow Control and Explicit Congestion Notification, and how the technology compares to InfiniBand for AI workloads. Lucas and Luna walk through real-world tuning…
How EVPN-VXLAN Modernizes Data Center Networking
In this episode of Networking Tech with Fexingo, Lucas and Luna dive into the technology powering modern data center fabrics: EVPN-VXLAN. They explain why traditional VLAN segmentation breaks at scale and how VXLAN tunnels combined with BGP-based EVPN control plane enable flexible, multi-tenant overlay networks. Lucas walks through a real-world migration scenario—from 4,000 VLANs to a logical EVPN fabric—highlighting the role of BGP Route Reflectors and the jump in operational simplicity. The…
How Anycast Routing Powers Internet Resilience
Episode 138 explores how anycast routing — where multiple servers share the same IP address — makes the internet more resilient. Lucas and Luna break down how BGP selects the closest server, why DNS root servers and CDNs rely on anycast for redundancy and DDoS mitigation, and the trade-offs engineers must manage. Specific examples include Cloudflare's 1.1.1.1, the L-root DNS server, and a recent DDoS attack absorbed by an anycast network. A must-listen for network engineers and anyone curious…
How 400G Ethernet Is Transforming Data Center Interconnects
Over the past two years, 400G Ethernet port shipments have more than tripled, driven by hyperscalers like Microsoft and Google who need to connect sprawling data centers handling AI workloads. This episode explores the shift from 100G to 400G: the coherent optics making it viable, the architectural changes it demands, and why some operators are already testing 800G. We also discuss the cost dynamics—per-bit cost drops by 30-40% with each generational leap—and the implications for latency and…
How Precision Time Protocol Synchronizes Critical Infrastructure Networks
In this episode of Networking Tech with Fexingo, Lucas and Luna dive into the world of Precision Time Protocol (PTP) and its critical role in synchronizing networks that demand microsecond or nanosecond accuracy. They explain how PTP differs from traditional NTP, the hardware requirements for deployment, and the specific use cases in high-frequency trading, 5G telecommunications, smart grids, and cloud data centers. The hosts also discuss the security implications of time synchronization and…
How GitOps Is Transforming Network Configuration Management
Lucas and Luna explore how network engineers are adopting GitOps and version control to manage switch and router configurations, treating network state like application code. They walk through a real-world example of a data center team using Ansible, NAPALM, and Batfish in a CI/CD pipeline to test and deploy changes across hundreds of devices, cutting configuration drift and outage risks. The conversation covers how even legacy gear fits into this workflow, the role of network-as-code in…
How Network Verification Tools Prevent Outages
Lucas and Luna dive into formal network verification, explaining how tools like Batfish catch BGP misconfigurations and routing black holes before they cause outages. They discuss real-world use cases in large data centers, the shift from manual testing to automated modeling, and how one company slashed change-related incidents by 80 percent. Plus, a behind-the-scenes look at how listener support keeps Fexingo ad-free. #NetworkVerification #Batfish #ForwardNetworks #BGP #RoutingSecurity…
Showing the latest 50 episodes. The full archive of 183 is on Apple Podcasts, Spotify and every major podcast app — or via the RSS feed above.