The endless story of OSPF vs IS-IS – Part 4 “The Inside Out”

May 22nd, 2010 mmahmoud Posted in Bury the hatchet, IGP, ISIS, Network Design, OSPF, Routing 2 Comments »

In this post we’ll be covering a couple of topics from the Inside Out of the link-state protocols that have always been ambiguous and full of details, we’ll try to make them as crystal clear as we can.

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The endless story of OSPF vs IS-IS – Part 3 “Packets and Database”

May 16th, 2010 mmahmoud Posted in Bury the hatchet, IGP, ISIS, Network Design, OSPF, Routing 3 Comments »

In this post we are going to cover the protocol packets and database structure for both routing protocols. To start let’s first highlight a couple of facts. OSPF runs on top of IP, that is it uses IP packets to exchange its messages (and thus it is vulnerable to spoofing and DoS attacks, and accordingly [...]

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The endless story of OSPF vs IS-IS – Part 2 “The history”

April 26th, 2010 mmahmoud Posted in Bury the hatchet, IGP, ISIS, Network Design, OSPF, Routing No Comments »

In our previous post we started consolidating the endless story of OSPF vs IS-IS, in this post we will cover the historical part of the story, it might not be interesting for some people, but I do believe that the history is what makes the future, so please bare with me through this post.

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The endless story of OSPF vs IS-IS

April 4th, 2010 mmahmoud Posted in Bury the hatchet, IGP, ISIS, Network Design, OSPF, Routing 1 Comment »

Whenever you have a little IGP chit chat you’ll hit this endless story. I’ve tried to reach a final solid conclusion my self but IMHO its all about personal preference and taste. It is something like a Ferrari vs Lamborghini story, they offer comparable performance, but totally different feeling. It is all about a good [...]

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How to select your core routers?

January 4th, 2010 Wael Osama Posted in Network Design, Platforms 1 Comment »

This question comes to my mind every time we are faced by choosing a new device for our network or whenever I read about hardware architecture of networking devices. However, when the time comes for  choosing routers for a large network migration I thought it will be wise to have a checklist or a model [...]

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CRS-1 Hardware Overview

December 23rd, 2009 Wael Osama Posted in Network Design, Platforms 4 Comments »

After introducing the Cisco  CRS-1 router in a previous post, We are going to delve more into the hardware architecture of this router. I believe we have to start by defining the main hardware components of the CRS-1 router and briefly describe their functions. In later posts we are going to study each part in [...]

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