Do Virtual Access Points add "noise" in bands?

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Timmy1024
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Joined: 18 Nov 2015
Posts: 54

PostPosted: Wed Aug 14, 2019 17:29    Post subject: Do Virtual Access Points add "noise" in bands? Reply with quote
Hi guys,

Just a simple question. Let's say I have created 10 virtual access points from my 2.4 GHz interface. Would those 10 extra "virtual" SSIDs add noise, make connection worse, etc. to my client devices, the same way as it would happen if my neighbor has 10 extra "real" access points running? Or since my creation are "virtual", it doesn't really matter that I have 10 extra SSIDs in the same channel, as they all are from one single interface and are being "simulated" by it?

Thanks!
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tatsuya46
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Joined: 03 Jan 2010
Posts: 7051
Location: YWG, Canada

PostPosted: Thu Aug 15, 2019 0:20    Post subject: Reply with quote
noise as in interference, no. increased overhead on the channel from more beacons, yes. which can be reduced by not using 802.11b rates, (as in 6mbps being lowest basic rate and not 1mbps) and increasing beacon interval.

if 10 vaps are running or just 10 aps period, on the same channel all nearby, and all are idle except one, the beacons used to broadcast those ssids will take up more airtime than if there was just one. if multiple of those vaps will be active at any given time, performance will cut in half (or more) if they are all from one radio, as the radio has to quickly alternate taking turns between each.

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jxm
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Joined: 23 Jul 2017
Posts: 706
Location: Brisbane, Australia

PostPosted: Thu Aug 15, 2019 1:00    Post subject: Reply with quote
Even when all access points are idle, each SSID will be transmitting 10 Beacon frames per second, which is not insignificant as Beacon frames are sent at the lowest possible speed. With wireless b enabled you would definitely notice a drop in your wifi speed.

It is probably academic, as I do not think you can add more than a couple of virtual ccess points with DD-WRT.

Cheers.
SurprisedItWorks
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Joined: 04 Aug 2018
Posts: 373
Location: Appalachian mountains, USA

PostPosted: Thu Aug 15, 2019 15:05    Post subject: Reply with quote
jxm wrote:
...I do not think you can add more than a couple of virtual ccess points with DD-WRT.

For the last year I've used five SSIDs for five subnets. Three of those are VAPs.

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Timmy1024
DD-WRT User


Joined: 18 Nov 2015
Posts: 54

PostPosted: Sun Aug 25, 2019 5:37    Post subject: Reply with quote
Thanks for your reply guys.

Quote:
For the last year I've used five SSIDs for five subnets. Three of those are VAPs.


Your nickname fits this comment great! Laughing
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