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How fast is your network?

You always wonder how fast is your network, right? How long does it take the information travel over the network?

I will share with you this special article, which you can use to find the speed of your network and define it with a numerical number.

I will use ring, partial mesh and full-mesh physical topologies to explain the concept.

Note : I assume bandwidth of all the links in the examples are the same for simplicity.

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Orhan Ergun 4 Comments

Your Design Should Be Usable!

Whatever you design , it should be usable first. Computer network design is not an exception.You are not designing a network to support one service only such as VPN or Internet.It should give enough functionality for today and future needs.

Your design should be usable today and the future !

It was so common to use TDM and Ethernet, IP or MPLS as a transport mechanism at the Access and Aggregation network and for the mobile backhaul. TDM is for the real time , delay , loss, jitter sensitive traffic, Ethernet is for the general data applications.

Building a TDM based network is good for real time applications but expensive at the same time. Thus if you will design a converge transport network, you need to understand your business requirements first.

Which services business want to offer ? What are the trends ?

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Orhan Ergun 5 Comments

Network Design Best Practices – Simplicity

Network Design should be simple! Simplicity is the first network design best practice that I want you to remember. If you have been in the field long enough, you have probably heard about the KISS principle.

If you are a regular follower of my blog, you have maybe heard about the SUCK principle as well.

KISS stands for Keep It Simple Stupid. But do you really know what the simple part is ?  Can every part of the network be a simple ?

Unfortunately NOT ! It just cannot be ! But still you should on simplifying as much of your network as possible.

As I have indicated in the past here, intelligence should be at the edge of the networks and network core should be as simple as possible. If you read the above article, you will see some examples. ( There are different opinions about the place of simplicity in networks. Some researchers believe that if the core has some intelligence the overall network complexity is reduced ).

Networks have many protocols, technologies. Understanding each of them might be easy but interaction between them creates complexity.

In my CCDE training sessions, I like to give the Pepper and Salt example to explain this point.

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