Networking Tech with Fexingo: Internet Infrastructure, Routing, and Network Engineering

In this episode of Networking Tech with Fexingo, Lucas and Luna explore intent-based networking (IBN) — a paradigm shift where network operators declare what they want the network to do, and the system automatically configures, monitors, and adjusts to meet that intent. They break down how IBN goes beyond traditional automation by adding closed-loop verification, using real examples like Cisco's DNA Center and Juniper's Apstra. Lucas explains the key differences between imperative automation (like Ansible scripts) and declarative intent, and why IBN is crucial for handling today's complex, multi-vendor environments. They also discuss real-world deployment challenges, such as the need for accurate telemetry and the cultural shift required for network teams to trust automated decisions. If you're a network engineer wondering how to reduce downtime and configuration errors, this episode gives you a clear picture of where the industry is heading.

#IntentBasedNetworking #NetworkAutomation #Cisco #Juniper #Apstra #DNACenter #DeclarativeNetworking #ClosedLoop #NetDevOps #NetworkEngineering #NetworkManagement #TechTrends #Podcast #FexingoBusiness #BusinessPodcast #NetworkingTech #ITStrategy #DigitalTransformation

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Episode 61 of Networking Tech with Fexingo dives into network verification—why even a single misconfigured BGP prefix can take down a global bank for hours. Lucas and Luna walk through the 2024 outage at a major European bank caused by a missing route-target import statement, then explore how formal verification tools like Batfish and forward- and backward-annotation logic are catching errors before they hit production. They discuss the shift from post-outage postmortems to pre-deployment proof-checking, and why network engineers are borrowing verification techniques from software engineering. If you've ever wondered why your Zoom call froze or your trading platform stalled, this episode explains the invisible safety net—or lack thereof—behind modern networks.

#NetworkVerification #ConfigurationErrors #BGP #Batfish #FormalVerification #NetworkReliability #OutagePrevention #RouteTarget #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #NetworkAutomation #IntentBasedNetworking #InfrastructureAsCode #GoldbergAlgorithm #ForwardAnnotation #BackwardAnnotation

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Episode 60 of Networking Tech with Fexingo dives into Passive Optical LAN (POL) — a fiber-to-the-desk architecture that replaces traditional copper Ethernet in large buildings. Lucas explains how a single fiber strand from an Optical Line Terminal (OLT) can serve up to 128 endpoints via passive splitters, slashing cabling and power costs. He cites a real case: a 500,000-square-foot hospital that saved over 40 percent on installation and 60 percent on energy by switching from Cat6 to a GPON-based POL. Luna raises the elephant in the room — active Ethernet equipment is cheap now, so why switch? Lucas walks through the total-cost-of-ownership math, including reduced cooling, maintenance, and switch-replacement cycles. They also touch on the signal-loss budget, split ratios, and how POL handles Power over Ethernet (PoE) for security cameras and Wi-Fi access points. The verdict: POL is overkill for small offices but a no-brainer for campuses, hospitals, hotels, and multi-tenant buildings. The hosts then briefly mention that listener support via buy me a coffee dot com slash fexingo keeps the show ad-free and independent.

#PassiveOpticalLAN #GPON #FiberToTheDesk #OLT #ONT #NetworkArchitecture #StructuredCabling #EnterpriseNetworking #HospitalIT #PowerOverEthernet #OpticalSplitter #TCO #EnergyEfficiency #Technology #FexingoBusiness #BusinessPodcast #NetworkEngineering #FiberOptics

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In this episode of Networking Tech with Fexingo, Lucas and Luna dive into Zero Touch Provisioning (ZTP) — the automation framework that lets network engineers deploy switches and routers without manual CLI configuration. They break down the real-world workflow using a concrete example: a retail chain rolling out 500 edge switches across 200 stores in three months. The conversation covers the role of DHCP, TFTP, and vendor-specific bootstrap scripts, contrasts ZTP with traditional staging, and explores common pitfalls like misconfigured DHCP scopes and certificate validation failures. Lucas explains how ZTP integrates with network provisioning tools like Ansible and Salt to enforce consistent configs at scale, and highlights how the retail chain reduced deployment time from 45 minutes per device to under 8 minutes. The episode also touches on the tension between automation and security — specifically, how to handle the cryptographic trust anchor for the first-time bootstrap. If you're a network engineer or IT manager looking to speed up site rollouts, this episode gives you the concrete details you need to evaluate ZTP.

#ZeroTouchProvisioning #NetworkAutomation #DHCP #TFTP #NetworkProvisioning #CLI #Ansible #SaltStack #RetailNetworking #EdgeSwitches #BootstrapScript #CertificateValidation #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #NetworkingTech #ITInfrastructure

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Segment Routing over IPv6 (SRv6) is reshaping how service providers and large enterprises build their wide-area networks. In this episode, Lucas and Luna explore a real-world deployment at a major European telecom that cut provisioning time from weeks to minutes. They explain how SRv6 embeds routing instructions directly into the IPv6 header, replacing the complexity of MPLS with a simpler, more programmable approach. The conversation covers the trade-offs with traditional MPLS, the role of network slicing, and why operators are adopting SRv6 for 5G backhaul and data center interconnect. Specific numbers include the reduction in routing table size by 40 percent and the five-year roadmap from a Tier-1 operator. If you've heard the buzz around SRv6 and want to understand what it actually changes in the network, this episode gives you the concrete case.

#SegmentRouting #SRv6 #IPv6 #WideAreaNetworks #MPLS #NetworkSlicing #5GBackhaul #ServiceProvider #Routing #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #Telecom #DeutscheTelekom #NetworkAutomation #DataCenterInterconnect #InternetInfrastructure

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In this episode of Networking Tech with Fexingo, Lucas and Luna dive into intent-based networking (IBN) — a paradigm shift where network operators declare what they want the network to do, and software translates that intent into configuration, deployment, and continuous verification. They explore a concrete example: how a large financial services firm, JPMorgan Chase, has been using Cisco's IBN platform to reduce provisioning time for new trading floor circuits from weeks to hours. The discussion covers the core components of IBN — translation, validation, automation, and assurance — and contrasts it with traditional CLI-driven or scripted approaches. Lucas explains how the system continuously monitors for drift and automatically corrects deviations from the declared intent, using closed-loop feedback. They also touch on challenges: the cultural resistance from engineers who trust the CLI, the upfront modeling effort, and the vendor lock-in risk. The episode wraps with a reflection on whether IBN truly delivers on its promise of error-free, agile networks, and what operators should consider before adopting it.

#IntentBasedNetworking #IBN #NetworkAutomation #JPMorganChase #Cisco #NetworkOrchestration #ClosedLoopAutomation #NetworkAssurance #CLItoIntent #NetworkEngineering #Tech #FexingoBusiness #BusinessPodcast #NetworkingTech #NetworkOperations #DevOpsNetworking #InfrastructureAsCode #DigitalTransformation

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Episode 56 of Networking Tech with Fexingo dives into network slicing, the technology that carves virtual private networks out of a single physical infrastructure. Hosts Lucas and Luna explore how Ericsson and Deutsche Telekom deployed a slice for a factory automation use case in 2025, achieving 99.9999% reliability on a shared 5G transport network. They break down how slicing works at the routing layer using segment routing and network function virtualization, why it matters for industrial IoT and autonomous vehicles, and the tension between carriers who want to offer slices as services and regulators who worry about net neutrality. Lucas explains the difference between a slice and a VPN, and why the transport network is the hardest part to guarantee. No buzzwords, just a clear look at how one network can become many.

#NetworkSlicing #5G #SegmentRouting #Ericsson #DeutscheTelekom #PrivateNetworks #IndustrialIoT #NetworkFunctionVirtualization #ServiceLevelAgreement #NetNeutrality #TransportNetwork #FactoryAutomation #AutonomousVehicles #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #NetworkingTech

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Lucas and Luna unpack Segment Routing (SR-MPLS), the technology that lets network operators define explicit paths through a wide area network without maintaining per-flow state on intermediate routers. They walk through the classic problem — traffic engineering on large MPLS networks requires hundreds of label-switched paths and constant signalling — and show how SR replaces that with a single source-routed instruction list carried in the packet header. Along the way they discuss real-world deployment at a Tier 1 European service provider that cut its LSP count by 94 percent, and examine how SRv6 extends the same idea into IPv6 for cloud and 5G backhaul. They also touch on the operational shift: operators move from troubleshooting per-tunnel state to designing segment lists, which changes the skill set required in the NOC. Episode 55 of Networking Tech with Fexingo.

#SegmentRouting #SRMPLS #SRv6 #NetworkEngineering #Routing #MPLS #TrafficEngineering #WideAreaNetworks #ServiceProvider #IPv6 #NetworkAutomation #Cisco #Juniper #5GBackhaul #NetworkArchitecture #Technology #FexingoBusiness #BusinessPodcast

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In this episode of Networking Tech with Fexingo, Lucas and Luna dive into the emerging practice of Network Configuration as Code (NCaC). They explore how treating network configurations like software code — with version control, automated testing, and CI/CD pipelines — can eliminate configuration drift and reduce human error. The hosts break down a real-world example: a 2025 outage at a major cloud provider caused by a missing VLAN tag in a YAML file, which could have been caught with a simple syntax check. They discuss the role of tools like Ansible, Terraform, and Batfish in validating configurations before deployment, and why traditional CLI-driven changes are becoming too risky for modern networks. The episode also touches on the cultural shift required for networking teams to adopt software engineering practices. By the end, listeners will understand how NCaC brings reliability and auditability to network operations, and why it's becoming essential for any organization running complex infrastructure.

#NetworkConfigurationAsCode #NetworkAutomation #NetworkEngineering #InfrastructureAsCode #DevOpsForNetworks #CLIIsDead #YAML #Ansible #Terraform #Batfish #ConfigurationDrift #GitForNetworks #CI_CD #OutagePrevention #TechPodcast #FexingoBusiness #BusinessPodcast #Technology

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Episode 53 of Networking Tech with Fexingo dives into the shift from monolithic routers to disaggregated, white-box hardware running open-source network operating systems. Lucas and Luna explore how software like SONiC and FRRouting separates control and forwarding planes, enabling operators to mix and match hardware from different vendors. They examine real-world adoption at major hyperscalers, the role of the Open Compute Project, and how this trend is lowering costs and accelerating innovation. The hosts also discuss the trade-offs: operational complexity, the need for in-house engineering, and why traditional vendors like Cisco and Juniper are pivoting. A must-listen for network engineers evaluating next-gen architectures.

#DisaggregatedRouting #WhiteBoxNetworking #SONiC #FRRouting #OpenComputeProject #NetworkOperatingSystem #VendorNeutral #Hyperscaler #DataCenterNetworking #RoutingProtocols #BGP #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #NetworkingTech #Podcast #TechTrends

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