Feb 14 · 3 min read · This week, I was deep in a multi-area OSPF lab on Cisco NX-OS and stumbled onto a scenario that defies standard "Cost" logic. The lab setup: 4x Cisco N9K switches in different OSPF areas. ASBR R4: Injecting a default route (0.0.0.0/0), Type E1, Me...
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Nov 24, 2025 · 2 min read · Modern airports rely heavily on secure and efficient communication systems. Multiple departments—Airport Authority, Security, Flight Services, and Guest Zones—handle different types of data and need isolated yet well-coordinated network segments. To ...
Join discussionOct 8, 2025 · 7 min read · When it comes to building and managing networks, routing protocols are the unsung heroes that make sure data packets find their way from one device to another efficiently and reliably. Among the most widely used routing protocols in today’s networks ...
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Jul 16, 2025 · 43 min read · If you’re learning networking and starting to dive into dynamic routing protocols, OSPF can feel a bit overwhelming at first. It’s not as straightforward as RIP, and it comes with a bunch of new terms like LSAs, LSDB, areas, and cost metrics. But onc...
Join discussionMar 22, 2025 · 10 min read · Open Shortest Path First (OSPF) is a link-state routing protocol that is used to find the best path between the source and the destination router using its own Shortest Path First. The protocol recalculates routes when a link fails and the network t...
Join discussionMar 17, 2025 · 2 min read · When designing an SD-WAN underlay, choosing between OSPF and BGP depends on the architecture: Hub-and-Spoke: BGP is usually the better choice. Full Mesh: Neither is ideal, but BGP scales better than OSPF. Let’s break this down. 1. Hub-and-Spoke ...
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Mar 7, 2025 · 4 min read · Introduction This lab simulates an enterprise network peering with two ISP routers via BGP, while utilizing a multi-layered, multi-area OSPF topology for internal routing. The goal of this setup is to explore BGP peering, OSPF multi-area configuratio...
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Mar 5, 2025 · 4 min read · Building an Interactive Network Map Visualization Tool Network visualization is a critical aspect of modern network management. Being able to see your network infrastructure laid out visually helps engineers identify issues, plan expansions, and expl...
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