Speed decrease on 2.4 GHz bonding channels (40 MHz)

Discussion in 'Tomato Firmware' started by TabascoJoe, Mar 3, 2014.

  1. TabascoJoe

    TabascoJoe Reformed Router Member

    I am using the latest Toastman firmware on the e3000.
    On the 2.4 GHz if I select 20 MHz channels I get good speeds. Around 40mbs on speedtest.
    When I switch to 40 MHz the speeds drop to 1 to 3mbs. What is causing this. I've tried every 40Mhz channel, upper and lower. Still same slow speeds.
  2. FattysGoneWild

    FattysGoneWild LI Guru Member

    I don't remember off hand exactly why. But, I do know its always been optimal to use 20MHz for channel width when using 2.4GHz. Use 40MHz for 5GHz band.
  3. Malitiacurt

    Malitiacurt Networkin' Nut Member

  4. koitsu

    koitsu Network Guru Member

  5. eibgrad

    eibgrad Network Guru Member

    Given that channel bonding requires using two channels, and only 3 are non-overlapping w/ 2.4GHz, channel bonding w/ 2.4GHz is a joke. Not unless you live out in the middle of nowhere.
  6. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    There are also some specific router and client device driver combinations that don't work well with 40MHz channel width, such as some Intel wireless cards.
  7. mito

    mito Network Guru Member

  8. TabascoJoe

    TabascoJoe Reformed Router Member

    Can you achieve 300 Mpbs not using channel bonding (20 MHz)? or is the requirement for 300 Mpbs the combination of two channels?
  9. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    In 802.11n, 40MHz channel width is needed for 300 or 450mbps
  10. koitsu

    koitsu Network Guru Member

    Did you seriously just miss the entire point of everything everyone above you said? It really looks like you did. The issue has to do with the fact that you're trying to use 40MHz on the 2.4GHz band. Stop that immediately. If you want 40MHz, use the 5GHz band. It's that simple.
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