OSPF LSA Type 1: Router LSA flooded within the area generated by each router the Link State ID = the router ID of the sending router provides information about directly connected networks OSPF LSA Type 2: Network LSA flooded within ... Read More »

The Obstacle Is The Way


This audiobook is something I wished I had read it in my younger years. If you’ve heard of Aratus, Aristo, Plato, Epictetus, Marcus Aurelius… then you have probably heard of the Stoicism discipline. What I liked in “The Obstacle is ... Read More »

Cisco IP SLA Track For PBR

We learn in this blog post how to leverage Cisco IOS IP SLA tracking with PBR. Cisco IP SLA track for PBR: a sample topology I used Eve-NG to generate this network topology. Using PBR to change the path of the ... Read More »

Cisco IOU Unsupported Features

Here is a list of Cisco IOU unsupported features that you probably won’t find, when labbing using Eve-NG or GNS3. The missing features were found with i86bi-linux-l2-adventerprise-15.1b.bin image. But the same observations could be true for other versions too. Cisco IOU ... Read More »

Spanning Tree Root Port Election

Spanning Tree Root Port Election: How does it work? We said that non-tooy ridges have one Root Port. But how is it chosen? The Root Port is elected by the following criteria: the port that receives the superior BPDU the ... Read More »

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