Low Latency WLAN network design

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ben_gig

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Nov 19, 2017
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Low Latency WLAN network of a Two-floor building with dimensions 400m x 400m
Users must have access to the network from every point ,including outside
The network must support 300 users simultaneously per floor.
I have to consider scalability, performance, reliability and management.

What I did.

All rectangles are the same 40 meters X 50 meters
I have two choices which I think it will work


1. I will add the same rectangles just under to this image to this so I get 400 m. I will add a switch in the middle of the last line. [distance 100 m from central switch so I will connect it with fiber? or 100BaseT?] and after I will add two switches in the same position respectively [as the other two] and connect them to the switch in the last line middle..I done the to an image .See the image
the bandwidth will still be efficient?

2. I will change the dimension from 50 to 100. I think this will not work because access points support up to 76m

General:

Switches have 8 ports.Access points will be connected with the switches using 100BaseT
Below you can see the first floor.The second floor will be the same except the switches and router in the middle. Assume that all distances are same


thank you for any advice.


http://photouploads.com/images/670c06.png
 
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ben_gig

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Hi,
Thank you for your answer.
I know about the 100BaseT , what you suggest me to use instead? And theoretically my network will work?
 
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bill001g

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Maybe a better question is why did you choose 100baset. This is extremely old technology, this almost seems like a homework question from books that still talk about this ancient garbage technology.

8 AP to run 300 users is going to depend a lot on how many of those are actually active and the type of data they are transferring. It takes very few users doing things like streaming video to exceed the capacity of a AP.
 
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ben_gig

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Yes I guess it's old option. What you suggest me?. There are 20 Access points each floor. The main question i have is.. do we connect these two switches with fiber or baseT?
http://photouploads.com/images/fc55d0.png

Actually if I connect the two switches in the left and right with fiber to the main central switch .. will it work?

 
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bill001g

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It is pretty simple. If you are over 100meters you must use fiber. If you are under 100meters you have the option of using copper ethernet...nobody calls it "baset" anymore. That terminology was used when you could use copper coax cable or copper twisted pair.

Now days it is mostly referred to as CAT5e or CAT6a. Cat6a is used to 10gbit connections.

How you connect the switches depends on a lot of things but is mostly related to how much traffic flows between them. In general it is best to run them back to the central switch. It gets much more complex when you need to provide redundancy in case of a switch or cable failure.
 
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ben_gig

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Thank you very much for your answer. You make me think much more clear. you are absolutely right, I didn't think of that.
So I will connect the 4 8-port switches which are about 200 m away from central (first and second floor) to the central switch using fiber (is there any specific type ? ex.1000 Base SX Multimode Fiber
i suppose that I use Cisco SRW2008P 8-port Gigabit Switch switches

by the way does my network support 300 users per floor?
 
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bill001g

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It depends on the type of fiber you have. If you are going to run the fiber new then use multimode and SX optics. Be sure to watch your power requirements for the AP if you plan to power them with these switches.

The switches themselves will not limit the number of users. You need to be sure you have enough ports to plug all your AP.
 
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Someone Somewhere

Someone Somewhere

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I'm not quite sure I would agree with that. 100BASE-T is a long-winded term, but I'd still generally say that we're installing Cat6a cable or whatever, and that it's being run at 100meg, or gigabit, or ten gig. Or having HDMI put over it, because you can do that too.

Confusing the type of cable with the protocol being carried over it is... not a good idea.
 
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ben_gig

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hi thank you for your answer. Because it is low latency network I think each AP can support up to 21 users.. there is a ratio 3:1.
I am not sure how to make it support more. In the image I made it can support 220 users each floor. I use a specific AP cisco model.
 
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