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

Lucas and Luna dive into the shift from traditional NetFlow monitoring to modern flow telemetry. They break down why NetFlow's sampling and polling limits can't keep up with 400G links, how industry-standard IPFIX evolved from NetFlow v9, and what streaming telemetry from Cisco's Model-Driven Telemetry and Juniper's Jvision actually does differently. The episode centers on a concrete example: a large financial firm that replaced sampled NetFlow with full-flow telemetry and cut mean-time-to-detect from 12 minutes to under 30 seconds. They also discuss open-source tools like GoFlow and Kafka pipelines for ingesting flow data at scale. No clickbait—just the real engineering trade-offs.

#FlowTelemetry #IPFIX #NetFlow #NetworkMonitoring #StreamingTelemetry #ModelDrivenTelemetry #Cisco #Juniper #GoFlow #Kafka #NetworkObservability #sFlow #EnterpriseNetworks #DataCenterNetworking #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast

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Episode 121 of Networking Tech with Fexingo dives into BGP communities — the tags that let network engineers influence routing decisions across the internet. Lucas and Luna break down how a single community attribute can control where traffic enters or leaves a network, using real examples like AS 1239 (Sprint) and AS 174 (Cogent). They explain large communities, well-known communities like NO_EXPORT, and how content delivery networks use communities to optimize peering. If you've ever wondered how ISPs manage traffic engineering without touching every router, this episode gives you the concrete mechanics — and why communities matter more as network operators adopt automation. A quick listener-support note at the end keeps the show ad-free.

#BGP #BGPCommunities #NetworkEngineering #InternetRouting #TrafficEngineering #Peering #ISP #CDN #Automation #LargeCommunities #NO_EXPORT #Sprint #Cogent #RouteOptimization #NetworkControl #Technology #FexingoBusiness #BusinessPodcast

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Episode 120 of Networking Tech with Fexingo dives into Resource Public Key Infrastructure (RPKI) and Route Origin Authorization (ROA) — the technology preventing BGP hijacks. Lucas and Luna walk through how a single misconfigured route announcement can redirect global traffic, using the 2018 Amazon DNS hijack as a concrete example. They explain how RPKI lets network operators cryptographically verify that an AS is authorized to announce a prefix, and they explore real-world adoption numbers: as of mid-2026, roughly 40 percent of the world's prefixes are covered by ROAs, up from under 5 percent in 2020. They also touch on the challenges — false positives, resource strain on routers, and the tug-of-war between security and flexibility. No prior networking knowledge required, just curiosity about how the internet stays intact. If you rely on the internet for work, this episode will change how you think about every packet that reaches your screen.

#RPKI #BGP #InternetRouting #NetworkSecurity #BGPInterception #ROA #RouteOriginAuthorization #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #InternetInfrastructure #BGPsecurity #AmazonDNSHijack #CryptographicVerification #RoutingTable #ASN #RIR

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Lucas and Luna explore how Internet Exchange Points (IXPs) like AMS-IX and DE-CIX are the hidden infrastructure that keeps internet traffic local and fast. They break down the economics of peering, how a single exchange in Amsterdam carries over 10 terabits per second, and why the rise of regional IXPs is changing latency for users worldwide. A concrete look at the physical hubs where networks meet.

#InternetExchangePoints #IXP #AMSIX #DECIX #Peering #NetworkRouting #Latency #InternetInfrastructure #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #TechInfrastructure #InternetBackbone #BGP #CarrierHotel #TrafficExchange #GlobalConnectivity

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Episode 118 of Networking Tech with Fexingo dives into the quiet revolution happening inside modern data centers: the shift from traditional VLANs to EVPN-VXLAN. Lucas and Luna break down why the old 12-bit VLAN ID is hitting a wall at 4094 networks, and how VXLAN expands that to 16 million virtual networks using UDP encapsulation. They walk through a real-world example at a major cloud provider that migrated a multi-tenant environment from VLANs to EVPN-VXLAN, cutting provisioning time from days to minutes and eliminating spanning-tree headaches. Listeners learn how MP-BGP and Type 2 routes enable MAC address learning across Layer 3 underlays, why ARP suppression reduces broadcast noise, and what it means for network engineers today. If you design, build, or manage data center networks, this episode gives you the concrete rationale and deployment patterns behind the biggest under-the-hood change in data center networking since leaf-spine architectures.

#EVPNVXLAN #VXLAN #DataCenterNetworking #VLAN #NetworkEngineering #MPBGP #LeafSpine #NetworkVirtualization #OverlayNetworking #NetworkAutomation #CloudNetworking #Technology #ITInfrastructure #Networking #FexingoBusiness #BusinessPodcast #TechPodcast #SoftwareDefinedNetworking

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Episode 117 of Networking Tech with Fexingo dives into network slicing — the technology that carves dedicated virtual networks out of shared 5G infrastructure. Lucas and Luna use the example of a German automotive factory that deployed a private 5G slice for real-time robotic control, isolating its latency-critical traffic from background data. They explain how 3GPP standards define slice types (eMBB, URLLC, mMTC), how operators like Deutsche Telekom and Ericsson are implementing end-to-end orchestration, and why this is relevant beyond telecom: enterprises like Amazon and GE are now asking for slice-aware WAN connectivity. The hosts also discuss the tension between slice isolation and cost, and what it means for network engineers who need to bridge their on-premises QoS models with carrier-managed slicing. By the end, listeners will understand why network slicing is not just a 5G gimmick — it's becoming a procurement requirement for industrial IoT.

#NetworkSlicing #5G #PrivateNetworks #IndustrialIoT #URLLC #DeutscheTelekom #Ericsson #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #NetworkInfrastructure #3GPP #Orchestration #QoS #Automation #EdgeComputing #IIoT

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Episode 116 of Networking Tech with Fexingo explores the often-overlooked role of backplane bandwidth in modern switch and router design. Lucas and Luna explain how internal fabric capacity dictates real-world throughput, using the example of a typical 100-gigabit-per-second port count versus actual forwarding capacity. They discuss the shift from shared-bus architectures to crossbar and Clos fabrics, and why oversubscription ratios matter more than raw port speeds. The episode also touches on how hyperscalers like Google and Microsoft design custom switches to match their specific traffic patterns, and how the industry is moving toward 51.2-terabit-per-second switch ASICs. A practical anchor: why a 48-port 25-gig switch with 12.8 terabit-per-second backplane can still bottleneck under heavy east-west traffic.

#BackplaneBandwidth #SwitchDesign #NetworkEngineering #DataCenterNetworking #ClosFabric #Oversubscription #SwitchASIC #100Gigabit #Hyperscaler #GoogleNetwork #MicrosoftNetwork #EastWestTraffic #NetworkArchitecture #TechPodcast #FexingoBusiness #BusinessPodcast #InternetInfrastructure #RoutingAndSwitching

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Episode 115 of Networking Tech with Fexingo dives into the shift from SNMP to streaming telemetry for network monitoring. Lucas and Luna explore how model-driven telemetry with gNMI provides real-time, push-based data instead of polling, using real-world examples from large-scale data centers. They discuss the limitations of SNMP, the benefits of structured data models like OpenConfig, and how this change impacts network engineers' daily work. A concrete case: how a tier-1 ISP cut alert latency from 5 minutes to under 10 seconds using telemetry. No buzzwords—just the practical transition happening in networks today.

#NetworkTelemetry #SNMP #gNMI #OpenConfig #StreamingTelemetry #NetworkMonitoring #DataCenter #ISP #NetworkEngineering #ModelDrivenTelemetry #RealTimeMonitoring #NetworkAutomation #YANG #Networking #Technology #FexingoBusiness #BusinessPodcast #NetworkingTech

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In this episode of Networking Tech with Fexingo, hosts Lucas and Luna dive into DNS over HTTPS (DoH) and its impact on network security and administration. They explore how DoH encrypts DNS queries, preventing eavesdropping and manipulation by ISPs or attackers, but also bypasses traditional network filtering and monitoring. Using real-world examples like Firefox's default DoH roll-out and enterprise challenges, they discuss the trade-off between user privacy and network control. They also cover how IT teams can adapt using DNS-over-TLS, local resolvers, and policy enforcement. The episode provides a balanced look at why DoH matters for everyday internet users and network engineers alike.

#DNSOverHTTPS #DoH #DNS #NetworkSecurity #Encryption #Privacy #ITAdmin #Firefox #NetworkEngineering #Technology #FexingoBusiness #BusinessPodcast #InternetInfrastructure #Routing #CyberSecurity #DNSFiltering #NetworkPolicy #TechPodcast

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Episode 113 of Networking Tech with Fexingo dives into OpenTelemetry, the open-source observability framework that's upending traditional network monitoring. Lucas and Luna explore how OpenTelemetry's unified data model lets network engineers collect metrics, logs, and traces from routers, switches, and firewalls without vendor lock-in. They walk through a real-world example: a large cloud provider migrating from a legacy SNMP-based system to OpenTelemetry, cutting mean time to detection (MTTD) by 40 percent. The hosts break down the three pillars — metrics, logs, traces — and explain why tracing is the game-changer for root-cause analysis in complex networks. They also discuss challenges: the learning curve, gRPC overhead, and the need for a telemetry pipeline like OpenTelemetry Collector. If you're a network engineer tired of siloed monitoring tools, this episode gives you a concrete framework for starting your observability journey. No fluff, just practical insight from two pros who've been hands-on with the tech.

#NetworkingTech #OpenTelemetry #NetworkObservability #Monitoring #SNMP #Telemetry #Metrics #Logs #Traces #gRPC #OpenSource #NetworkEngineering #MTTD #RootCauseAnalysis #TechPodcast #FexingoBusiness #BusinessPodcast #Technology

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