I've always been fascinated by OSPF. I remember back in the day when I felt that I really know OSPF inside out until I went for a job interview where several interviewers grilled me on OSPF and I was like you know what? I really have to go back and dig as deep as possible into OSPF (and no, I did not get that job...).OSPF has many features and quirks, its flexible but also has many limitations, it's scalable but also can cause major headaches in large scale networks. In this post, I will be focusing on LSA Type 4 just because this a really interesting LSA. It is often misunderstood, misrepresented and as I will show towards the end, in
Year: 2020
Route Selection Criteria
I've been conducting interviews over the past 6 years and I've done probably hundreds of technical phone screening, on-site whiteboard sessions. I always make sure I ask questions on topics that are typically considered as core network fundamentals and I do that for two reasons. If the role is for a senior network engineer/architect, I want to confirm that the basics are not overlooked when I give the candidate a design or troubleshooting scenario. If the role is for a more of a junior level network engineer, I want to make sure that the candidate has a solid understanding of the fundamental network concepts. I'm a firm believer that solid understanding of the network fundamentals is key for any network