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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MTU and ping size confusion

February 7th, 2010 mmahmoud Posted in Bury the hatchet 12 Comments »

I am very glade to return back after pausing posting for a while. Actually we were very busy the last few months evaluating, designing and preparing for our company’s backbone migration, a little C Vs J with all its fun Anyway, while going through the low level design we faced a little confusion when evaluating [...]

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VRF Selection Based on Source IP Addresses

April 9th, 2009 mmahmoud Posted in Bury the hatchet, MPLS 2 Comments »

In this post we are going to cover a nice tool, actually I’ve never used it in production, but I was fully testing it during my CCIE SP lab preparations and wish to share it with you. It’s nice to have such a tool in your tool box when dealing with complex designs. The VRF [...]

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