Technical Blog

In this post, I will be introducing basic IS-IS configuration using the topology above. Before diving into the configuration section, I want to briefly introduce the mechanics of the protocol. Intermediate System to Intermediate System (IS-IS) is a link-state routing protocol—conceptually similar to OSPF—originally developed by Digital Equipment Corporation. While OSPF was built specifically for the IP stack, IS-IS was designed for the OSI (Open Systems Interconnection) model. Because it is independent of the Network Layer, it is incredibly flexible, allowing it to route both IPv4 and IPv6 seamlessly using the same underlying infrastructure. ...

Hi everyone, and welcome to my digital corner. My name is Ademola Ajayi, and I’ve spent the last decade navigating the evolving landscape of the IT industry. My career began as a Graduate Trainee Telecom Engineer, working on Ericsson multi-link nodes and radio base stations. While the physical layer was fascinating, I found myself constantly drawn toward the “magic” of Internet Protocol (IP). The Cisco Foundation Deciding to pivot, I dove head-first into the Cisco ecosystem. After self-studying Todd Lammle’s CCNA Sybex guide and completing formal training in Lagos, Nigeria, I earned my CCNA R&S. ...