Network design for chossing Right cisco product

Hi Team,

What are the parameters do we need to consider before choosing/opting or suggesting to the client for a Right cisco product (Switch/Router/Firewall) based on their reqirement

What generally Network designers follows the steps  before suggesting a Right cisco product to the client.
What are the parameters designers consider

Regards
Ramu
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RAMU CHAsked:
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RAMU CHAuthor Commented:
In Cisco Site there is a option for choosng a Product but it has many many multiple options , i think that is a time consuming ..

reagards
Ramu
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John MeggersNetwork ArchitectCommented:
The biggest challenge is figuring out what the requirements really are, because many times the customer himself will not really know.  You kind of have to learn what questions to ask and based on past experience, what pitfalls to watch out for.  What function does this device perform in the network?  Is this a layer 2 or layer 3 device, or both? What physical interfaces are used?  What protocols does it need to support? Does it need to perform security functions?  Are there any physical requirements such as being rack-mountable, airflow requirements, etc.  Some of these may seem obvious for some kinds of devices but all are relevant questions that can help guide you to recommend a product that meets all (or as many as possible) of the requirements.  Topology diagrams can help, if they're available.

What you obviously want to avoid is making a recommendation only to find out there's some aspect of the network you didn't account for that changes what you want to do.  It doesn't look good to have to go back to a customer and tell them they need something additional because you hadn't accounted for something. For example, they might want to encrypt their WAN connections, and they have 100 sites, so a full mesh of site-to-site tunnels is not very manageable.  You might want to use DMVPN for scalability with some new updated routers, only to find out that a number of their remote sites use ASA 5505s, which don't support GRE, and consequently don't support DMVPN.  That may wind up steering you to a different approach, and a different recommendation.

Once you have an understanding of these things, you should be able to classify what kind of device it is (core router, branch office router, LAN switch, etc.), then look on Cisco's web site for product data sheets, comparisons between products, etc.  For a printed view of all products, there's a product reference guide (http://www.cisco.com/en/US/prod/qrg/index.html) which may help.  It helps to have a good working knowledge of the products so you at least have some ideas of where to start.  In the end, nothing beats experience.
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RAMU CHAuthor Commented:
Thanks
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