Planning network nodes

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imran205

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Nov 4, 2013
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Hi All

We are in the process of establishing a computer network from scratch in a building keeping the number of users in view. Normally we plan 30% to 40% additional network connections.
Is there any formula for calculating network nodes in an organization depending on the number of users.?

Thanks
 
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Generally switches are pretty cheap compared to the cost of the lan drops they connect to. The one that gets really expensive are PoE ports. You do not want to buy and leave unused a lot of those.

We generally have all the lan drops connected to the switch but disabled in the switch until they are used.. This makes the switches look pretty utilized. I would suspect we have less than 5% of the ports with nothing plugged into them.

The number of lan drops really depends on the type of user. You generally need to plan for 1 per desk and 2 if you are using IP phones that you can not plug the pc into the back of. The number of users that would need a second pc connect generally depend on what type of work is being done. A...
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Kewlx25

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Oct 23, 2009
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Network "nodes"? Switches? The number of switches depends on a mixture of how many network devices, on average, you expect each person to have. Depending on how your build is designed, you may want more or fewer switches depending on the cable runs lengths you want. While Ethernet can manage up-to 100m, you may want to keep it around 50m for one reason or another.

This doesn't even discuss possible issues of reselling the place. Better network connectivity may be a good thing when reselling.
 
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imran205

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Nov 4, 2013
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Lets say we need 100 network connections which include only users no other network devices. My question is that is there any standard formula used to calculate or it is just an assumption to increase total connections by 30 to 40%?
 
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bill001g

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Aug 9, 2012
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Generally switches are pretty cheap compared to the cost of the lan drops they connect to. The one that gets really expensive are PoE ports. You do not want to buy and leave unused a lot of those.

We generally have all the lan drops connected to the switch but disabled in the switch until they are used.. This makes the switches look pretty utilized. I would suspect we have less than 5% of the ports with nothing plugged into them.

The number of lan drops really depends on the type of user. You generally need to plan for 1 per desk and 2 if you are using IP phones that you can not plug the pc into the back of. The number of users that would need a second pc connect generally depend on what type of work is being done. A R&D type facility that has lots of engineering type of guys is likely to need much more than say a call center or a noc where you have shift work where a they only use a single pc and a single phone. Still in critical areas like a call center we tend to have a extra switch in the closet with nothing plugged into it to reduce the downtime if we take a switch failure.
 
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