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Question: Does having multiple virtual wireless networks cause channel clogging?

Discussion in 'Tomato Firmware' started by NyNe, Jun 4, 2013.

  1. NyNe

    NyNe Serious Server Member

    So, my router (Asus rt-n12 original running tomato shibby 109) supports broadcasting multiple virtual wireless networks, and I'm wondering if I broadcast let's say 4 wireless networks, will that cause the channel I'm using to appear clogged to other routers using site survey? And will it actually cause any harmful effect for my network (they are all setup with security)?

    My motive for the question is to try and keep others from "moving in" on the channel I'm using (overcrowded apartments).

    Sent from my SGH-I777 using Tapatalk 2
  2. koitsu

    koitsu Network Guru Member

    If you broadcast 4 wireless networks, they're all using the same set of channels, yes/no? (I'm actually asking you if this is the case -- I myself only configure one wireless network so I'm actually curious).

    If the answer to my question is yes, then the answer to your original question is: no, it will not cause additional congestion.

    There is no solution for the general congestion problem; today/right now Channel XYZ might be working great for you, but tomorrow it might turn to crap and require you to move to a different channel. There isn't anything that can be done about this -- it's the nature of 802.11 and its awfulness.
  3. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    I think he's got just one router with virtual wireless set up on 2.4GHz. All would use the same channel, sharing the same WLAN bandwidth. His intention is to use the virtual wireless network SSIDs not for data, but to discourage other people and their routers from selecting or auto-selecting the same channel. It may work for people who get the 1, 6, 11 thing, but others may pick an adjacent channel, which could make things worse than if they picked the same channel.
  4. koitsu

    koitsu Network Guru Member

    Hmm, I don't quite understand how multiple SSIDs would inhibit someone from picking a certain channel, particularly if all those used the same channel/frequency to begin with.

    Unless, of course, he's naming the SSIDs things like "PLEASE_DONT_USE_CHANNEL_9". ;-)
  5. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    Not a bad idea for an SSID.

    Good to see you back, Koitsu.
  6. Planiwa

    Planiwa LI Guru Member

    The OP asks a reasonable question.

    One problem is that such "surveys" show the BSSID.
    Someone who looks closely can see that it's the same radio.
    (A program written by a bad programmer (Broadcom wl) almost certainly will not.)

    And, thinking about Marcel's hint -- that program doesn't even know about 1-6-11, as I showed in another post here yesterday.
  7. FlashSWT

    FlashSWT LI Guru Member

    This might work for someone like me who does a "wireless site survey" every once in a while and moves my network to the least congested channel.

    Like at my new house, the majority of neighboring access points are on Channel 11, so of course I set my network to Channel 1.
  8. NyNe

    NyNe Serious Server Member

    In my case I have one 2.4GHz AP (rt-n12), broadcasting multiple virtual wireless all on one channel. So far it has worked perfectly. I see no real decrease in signal strength or speed and the before and after checks I've done confirm other APs set to auto channel seem to think my channel is a congested so they switch. I've set the virtual network names to random strings and the passwords to different random strings, and turned off broadcast for the SSID names (other than the primary one I actually use)

    Sent from my SGH-I777 using Tapatalk 4 Beta
  9. Monk E. Boy

    Monk E. Boy Network Guru Member

    Auto channel selection is a very strange creature and is rarely implemented the same way twice.

    I don't think having multiple SSIDs on the same router on the same channel will cause interference the same way having multiple routers on the same channel with different SSIDs are, at least from a performance perspective. The router is using the same radio to transmit/receive all the packets, this should make it incapable of collisions (with itself), though the more devices you put on that network the more collisions are possible (since each device, each radio, is capable of colliding with other devices when transmitting).

    I don't run multiple SSIDs though so this is really just me thinking out loud. I could be totally off base.

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