+ Post New Thread
Results 1 to 5 of 5
Wireless Networks Thread, 56 Laptops on one AP in Technical; For the first time since I installed the new wireless we had two laptop trolleys worth of connections through one ...
  1. #1

    Join Date
    Feb 2013
    Posts
    119
    Thank Post
    46
    Thanked 8 Times in 7 Posts
    Rep Power
    5

    56 Laptops on one AP

    For the first time since I installed the new wireless we had two laptop trolleys worth of connections through one AP.

    I'm awaiting further reports of user experience but it appears some slowing down of the system was observed. At the time I checked CPU occupancy of the AP (51%) and link utilisation of anything else relevant in the network and observed nothing untoward.

    My first thoughts are the noisy RF environment 56 laptop users in the same proximity would cause. Anyone else got any experience of this sort of usage please? The kit is Ruckus and sound as a bell, but the observed "slowing down" is telling me something.

    I have since upped the TX power from 1/4 to 1/2 to bring the adjacent channel signal levels up from -80dBm to a more useable -70dBm and reduced the maximum number of users per access point down from 100 to 35 in the hope of diverting the second set of laptops onto an adjacent area's access point. Again, any thoughts on this strategy please?
    Last edited by catch21; 7th December 2013 at 02:08 PM.

  2. #2

    Join Date
    Dec 2013
    Location
    Luton
    Posts
    4
    Thank Post
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Most the of the ruckus access points can handle 30 concurrent connections on each radio so I am glad to see you have reduced the amount of devices connecting to it.

    What are the devices you are connecting trying to do? if they are data intensive this will cause a contention ratio. each device wants air time to transmit, the more devices the less air time available for transmissions and more collisions occur (wasted air time)

    In terms of your co channel interference, I would begin with seeing what channel each access point is on. use 1/6/11 make sure two access points on the same channel are not next to each other, if possible make sure no two access points that are on the same channel area accessible from one location.

    In terms of the power used it totally depends on your environment, I would recommend leaving it on default.

  3. #3
    Quackers's Avatar
    Join Date
    Jan 2006
    Posts
    1,365
    Thank Post
    43
    Thanked 146 Times in 121 Posts
    Rep Power
    54
    Do your laptops and AP support both 2.4Ghz and 5Ghz? We use to do a 50/50 split on each frequency when we had laptop trolleys worked great. I've noticed a lot of the lower end market laptops and tablets don't support 5Ghz though which is a shame as thats the least congested band.

  4. #4
    kevin_lane's Avatar
    Join Date
    Mar 2007
    Location
    Derby
    Posts
    521
    Thank Post
    26
    Thanked 21 Times in 21 Posts
    Blog Entries
    5
    Rep Power
    20
    Also worth looking at the aggression as some laptops tend to stay locked on to particular aps we have some most of the laptops if not all to high so they can bounce of other aps tyou will need to look at the wifi cards hardware properties

  5. #5

    Join Date
    Jan 2014
    Location
    Bournemouth
    Posts
    34
    Thank Post
    0
    Thanked 3 Times in 3 Posts
    Rep Power
    2
    You're probably seeing slow-down because of the way wireless cards transmit over TCP/IP. They use CSMA/CA (Carrier sense multiple access with collision avoidance - Wikipedia, the free encyclopedia) so with 56 cards attempting to transmit in the same area will cause slow down, especially if they are all on the same channel.

SHARE:
+ Post New Thread

Similar Threads

  1. Teachers laptops on wireless network
    By bishopsgarthstockton in forum Wireless Networks
    Replies: 21
    Last Post: 27th February 2009, 08:53 AM
  2. what do you do - student laptops on domain
    By e_g_r in forum School ICT Policies
    Replies: 5
    Last Post: 13th June 2007, 08:56 AM
  3. DNS on one client not working even server IPs set correctly
    By NetworkGeezer in forum Wireless Networks
    Replies: 6
    Last Post: 13th February 2007, 02:13 PM
  4. Java Script fails to work on one user profile!
    By pmassingham in forum Windows
    Replies: 0
    Last Post: 29th June 2006, 07:32 AM
  5. Laptops on a CC3 domain
    By barryfl in forum How do you do....it?
    Replies: 8
    Last Post: 2nd February 2006, 11:09 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •