R600,SZ100 is taking overload latency with 30 clients

[harvi_yesid_cal]

R600 aps are working fine(answers about 1-5ms to gateway LAN), until 30+ clients connect to the SSID on same AP(300-600ms to gateway LAN).

Controller version: 3.5.1.0.862
Control Plane Software Version: 3.5.1.0.820
Data Plane Software Version: 3.5.1.0.807
AP Firmware Version: 3.5.1.0.1010

[michael_murphy_]

I'm probably going to play around with the channel mappings and power settings in one of my buildings and manually set them how I think it would be best.  We'll see if that improves things or makes it worse. 

This is just a nightmare though.  I don't know why I am doing the job my controller should be doing.

You have a good Christmas too!

[harvi_yesid_cal]

The problem is not channel mapping or power settings, i have already do and problem persist, the issue is about high density on Access Points, however, at least in theory, should not happen because AP support 500 clients.

I think better if you write to my whatsapp and start thinking what to do, i think so, any way, +573162267697.

Regards.

[michael_murphy_]

I also had a number of these; ap rebooted by the system.  I could have 1 to 5 a day.  Lately it's down to 1 every other day (check your events - look for "rebooted").
  


They had run a script to turn some things off on the aps for non essential services to reduce traffic.  Seems to have help reduce these reboots. We also tried Channelfly but went back to background scanning as it worked better.

[michael_murphy_]

I don't know about 500 users.  If you have 500 users I don't know if 120 ms latency is high.  I think it really depends on how much traffic is traversing the AP and the number of clients actively communicating.  More clients is probably more latency ( I think ).

For me 90% of my AP's never exceed 55 users.  High water mark on any given ap would be 75 at most.  Average is probably more like 30.  I can see latency becoming higher with more clients and traffic.  My issue when I see high latency with a low number of users (like in the picture from earlier today - 1 user and 220 ms latency).  Or 25 users and 600 ms latency.

The interesting part is 75% of my buildings are the same setup as last year but now perform badly compared to the past.  One building did have an increase in devices but I added more AP in that building.  My issues are in all building though.  So I say what changed.  Controller software.

Hope 3.6 helps you.  Let me know.

[jamie_walmsley]

Personally I wouldnt use auto power. Might be fine in a small environment with a handful of AP's but if you have a decent size deployment then allowing the AP's to set their own power levels means your cell sizes are dynamically changing, completely nullifying any WLAN design done before hand.

The AP has no idea about what its coverage cell area is supposed to be, its just reacting to what its seeing other AP's signal strengths at, so you are likely to end up either with area's with coverage holes or if the AP's power too high, increased co channel interference.

Best to manually configure power settings based on a design done in the likes of Ekahau or Airmagnet.