Link to home
Start Free TrialLog in
Avatar of Paula Wong
Paula WongFlag for United States of America

asked on

How can you tell how many concurrent users at 10Mbps is supported per AP?

Say you're trying to spec out the number of concurrent users for a Cisco AIR03602I-A-K9 at 10Mbps.  How can you figure this?  The data sheet doesn't seem to have this information.  

Or trying to figure out which model of AP would support 50 concurrent users at 10Mbps.
Avatar of Dr. Klahn
Dr. Klahn

The spec sheet probably doesn't have that information because the number of concurrent users depends on three things:

a) how much bandwidth each user needs.  Manufacturer doesn't know this, won't be on the spec sheet.
b) the bandwidth available.  Manufacturer doesn't know this, won't be on the spec sheet.
c) the maximum throughput of the switch.  This spec should be on the spec sheet.  This is a ceiling value for available bandwidth.  If there's 2 Gbps bandwidth available but the switch only supports 500 Mbps throughput, the bandwidth is limited at 500 Mbps.

Say the switch has available bandwidth of 100 Mbps ... (which as a side note is 12.5 MegaBytes / second - MegaBytes/second (MB/sec) = Mbps (Megabits/second) divided by 8; suddenly 100 Mbps doesn't look so big.)

1.  Each user is averaging 1 Mbps = 125 KB/sec.  The switch can support 100 Mbps/1 Mbps = 100 users.  This is not typical and would be a very low use situation such as receiving or sending text email or light database use.

2.  Each user is averaging 16 Mbps = 2 MB/sec.  The switch can support 100 Mbps/ 16 Mbps = 6 users.  This is plausible for moderate database use or graphics/video-intensive web browsing.

3.  Each user is averaging 50 Mbps = 6.2 MB/sec.  The switch can support 100 Mbps / 50 Mbps = 2 users.  This is plausible for casual video editing or very slow backup.

Now regarding the second issue, a feed is required that can supply 500 Mbps = 62.5 MB/sec.  If that's for local use across the LAN, no problem.  If that's for internet access, this is the top end of the cable tier and even at that, in my experience most providers can't deliver that 24/7/365 off a single modem.
ASKER CERTIFIED SOLUTION
Avatar of Craig Beck
Craig Beck
Flag of United Kingdom of Great Britain and Northern Ireland image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of Paula Wong

ASKER

Yes there will be more than 500 APs but still would like to know how to figure that on.  We're assuming not everyone will be connected at one AP but spread out evenly and at a minimum be able to support that many users at once and at that minimum amount of bandwidth.
The 3602 will be able to handle 15-20 users at 802.11ac data-rates if they're not using high-bandwidth applications with no trouble.
The newer APs support MIMO nowadays.
What do you mean, "No one assisted me with this"?

My comments were both worthy answers.
I provided a comprehensive solution.
Answer chosen