Networkers-online.com

Being in charge of choosing the right boxes for a service provider network is definitely a hard task specially if it is a large network migration and this is exactly what we were doing in the past few months. The challenge here is that your are faced with a lot of choices that will affect [...]

Been a while since my last post, I was extremely busy doing a lot of things, anyway I am glade to be back. This post I am going to cover a nice tool for enhancing IS-IS convergence, I am really amazed by the ideas that the guys out there pop up. Inventing such wonderful tools [...]

Link state protocols have introduced the concept of multiple routing areas withing the same routing domain. Link state protocols depend on the fact that all routers must have an identical link state database and then each router will start calculating its very own routing table from this information. However, this rule sometimes introduce scalability limitations [...]

IS-IS is the most selected protocol by service providers and large carriers all over the world; this is what makes the understanding  of this protocol important. We have been discussing fast convergence and high availability in the latest few posts and this post is not different, I am just going to give you an overview [...]

It is a very critical matter for a network architect (the same goes for a network operator but with a different prospective) to understand the inside out of tuning the routing protocols performance, in order to be able to conduct an appealing and effective low level design for small to large scale networks. We have [...]

Shortest path first (SPF) is the algorithm used by IS-IS and OSPF routing protocols to calculate the topological information from the received link state updates. You can find more information about SPF calculation follow the link Dijkstra’s algorithm. Partial SPF is an efficient shortcut used by the routers to speed up the process of route [...]