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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Carrier Routing System (CRS-1) Overview

December 10th, 2009 Wael Osama Posted in Network Design, Platforms 1 Comment »

We have finished the physical installation of our CRS-1 routers this week, so I thought it would be nice to have some discussions about CRS-1, Juniper T-series and some general high end platform concepts. I believe this will be a series of posts, we can start with the CRS-1 overview. The CRS-1 is a carrier [...]

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Routers’ Operating systems

July 2nd, 2008 Wael Osama Posted in Network Design, Platforms 3 Comments »

The router operating system is a piece of software responsible for managing the router resources by controlling and allocating memory, prioritizing system requests and processes, controlling I/O devices and managing file systems. The most two famous router operating systems are Cisco IOS and Juniper JUNOS. Cisco IOS is a monolithic OS which means it runs [...]

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Routers’ Memory types

June 3rd, 2008 Wael Osama Posted in Platforms 3 Comments »

The memory come in many forms for several storage purposes such as to store the operating system , the configuration, the bootstrap, packets, and so forth. Below is a detailed description of all memory types used in routers and the purpose of each. BootROM BootROM is used for permanently the storage of the startup diagnostic [...]

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