How many PCs per AP?

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Recently just did a full store inventory where I had 23 machines running on the wireless.  I had 4 APs spread throughout the area and all machines showed great connection.  These were all AP121.  The computers are all running Telnet sessions which go over the private LAN back to the main office.  The facility I was at has 10Mbps up and down.  The remote store has 50 up/down (because of multiple locations connecting to it).  What would cause telnet sessions to be laggy?  Some computers that were working would get a limited no connectivity, switched to a static IP and same thing?  Was it too much for the APs, the USB wireless adapters?
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jjohnsonsracing19

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Posted 4 years ago

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J. Goodnough, Champ

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A single AP121 should easily be able to handle ~25 clients, especially if the bulk of their traffic is a simple telnet session. I'd look to see if you've got some interference going on, or if the sluggishness is elsewhere on the network.
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BJ, Champ

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I tend to agree with Goodnough on the coverage. If anything, there may be an overlap in coverage, especially on the 2.4 spectrum, which can cause issues. 
Any packet loss pinging on the LAN? Next, I would ping across the WAN. A packet capture would be very revealing and should help identify whether you're facing a layer two or three issue.

Best,
BJ
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Nick Lowe, Official Rep

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How long is a piece of string comes to mind...
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Crowdie, Champ

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I would recommend:

1. Running iPerf on the wireless client and the Aerohive AP121.  This will show the throughput between the wireless client and the access point.
2. Running iPerf on the same wireless client and  server/Desktop PC on the other end of the WAN link.  This will show the throughput between the wireless client and the other end of the WAN link. 

If you want a simple "nice graph" application instead then Tamosoft's free Throughput Test product (http://www.tamos.com/products/throughput-test/) is hard to beat.
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Matt Kopp

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We ran into an issue at a customer site SPECIFICALLY with telnet to HP UX (11.6, if I recall correctly).

Define 'laggy' are we talking 1-second, 2-seconds, 15-seconds?  What is the switching hardware in-between?  Have you tested SSH - same outcome?

Does this happen with other devices - phones, tablets, laptops, barcode guns, avian carriers?
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jjohnsonsracing19

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Keystroke lag.  Hit a key and it would sometimes take 1, 10, 15 seconds to appear on the screen.  I have not tested SSH.  I was thinking maybe it was the USB adapters I was using.  I had just cheap Netis adapters.  It seemed to be the desktops that were having the issue.

Upon some further investigation we found out that some of the data we entered didn't actually make it to the server.
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Matt Kopp

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Rut roh...  Again, for giggles and grins, try other client types and SSH.  If you really wanted to get nerdy with it, setup a telnet server at the same site and see if the issue exists internally to the site?

The other thing you could try is temporarily enable telnet to the APs and telnet to one of them from one of the computers - just one extra step to see where the issue exists.