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RobClem
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How many wireless clients per AP?

Wed Oct 27, 2004 11:20 am

Hi all - I am interested to hear from WISP's that are using the MikroTik OS in wireless mode -

Whats the max number of wireless clients that you have managed to associate with a single radio and still give them all a good service.

I've heard of folks with 100+ associated clients but would like to know if this is really achievable?

Cheers

Rob
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normis
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Wed Oct 27, 2004 11:31 am

remember that if you have a 10Mbit link connected to the access point and the access point itself is 11mbit (in reality about 6) then just imagine what a pain it is to be one of those 100 who divide this between themselves ...

theoretical maximum is 2007. others please share your experience regarding this.
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RobClem
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Wed Oct 27, 2004 12:30 pm

We work on a 40:1 contention so 100 customers using a 6Mb link at 512k each is more than enough!!

I'd be interested to hear of real world scenarios where you have an 802.11b radio and lots of customers.

To date I have used SmartBridge AP's and these start to run out of steam with more than 35 customers - I'd like to have a MikroTik AP with a high end motherboard, processor and memory hopefully increasing the above 35-40 limit of the SmartBridge AP's.

Cheers

Rob
 
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normis
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Wed Oct 27, 2004 12:48 pm

i guess the fact that here in latvia people have 10 or 100 mbit links in their homes has somewhat crippled my understanding of `internet access` :)
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RobClem
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Wed Oct 27, 2004 12:55 pm

how much!!!!!!

what does 10Mb or even 100Mb cost in Latvia for a home user?
 
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normis
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Wed Oct 27, 2004 1:03 pm

for my 10mbits i pay about 30$ a month (no limits, no traffic accounting). there is my colleague here who pays the same for a 100mbit
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RobClem
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Wed Oct 27, 2004 1:13 pm

how are the ISP's delivering 100Mb to a home? I can only assume that is over Fibre and not Wireless?
 
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normis
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Wed Oct 27, 2004 1:48 pm

they have their fiber optics which they then divide with 100mbit hubs/switches. this usually works in rural areas where there are a lot of homes (apartment buildings). here is the latvian internet exchange sheme: http://www.lix.lv/shema/shema.htm but this is kind of off-topic :)
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bjohns
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Thu Oct 28, 2004 1:41 am

Bandwidth isn't the bottleneck really, it's the half duplex nature of 802.11b (nstream cures this).

You have to treat an AP as a conventional class 1/11 repeater, you wouldn't throw too many people on a single segment, most cases you'd limit each segment to 12 seats. This is not exactly correct as a repeater is using CSMA/CD, and an AP is using CSMA/CA, so it would be like a hybrid ethernet/tokenring network as the AP can poll clients if they reach set thresholds.

Another thing that tends to nail wireless is small packets, if you have a client throwing >100packets/sec at the AP and maybe consuming less than 10kB/sec, they're still going to cause the AP to struggle with the load. So having lots of clients giving out the occational burst of small packets can tie things up a bit. Unless you're using 'packet packing' between MTRouters etc.

Anyway, to answer the question the most amount of clients I have on a single AP (single channel) is ~25.

So it's probably better if you have multiple wireless interfaces with sectorised antennas when operating in high density areas.

And for those in Latvia, send some bandwidth down this way!
 
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djape
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Sat Nov 06, 2004 7:57 pm

I have Mikrotik AP with 45 users with no probs, cheers...

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