Wireless N operating very slowly

Discussion in 'Tomato Firmware' started by darksky, Jun 16, 2013.

  1. darksky

    darksky Addicted to LI Member

    Running an Asus RT-N16 with Toastman's 1.28.7502.1 (tomato-K26USB-1.28.7502.1MIPSR2Toastman-RT-VLAN-Ext). When I connect my workstation via the onboard wireless N, and transfer a file from my NAS which is hardwired to a gigalan switch, the speed averages 5.6 MB/s (44.8 Mbps).

    When I disconnect wirelessly, and connect to the gigalan switch, file transfers go at about the speed of the HDDs: 113.4 MB/s (907 Mbps). The status page shows that the Rate is 300 Mbps so I'm wondering why my wireless xfers are so darn slow.

    Wireless (2.4 GHz / eth1) (Click here to hide)
    Wireless Mode    Access Point
    Wireless Network Mode    N Only
    Interface Status    Up (LAN)
    Radio    Enabled
    SSID    blackhole
    Broadcast    Enabled
    Security    WPA / WPA2 Personal + AES
    Channel    11 - 2.462 GHz
    Channel Width    40 MHz
    Interference Level    Acceptable
    Rate    300 Mbps
    I will also say that the "Rate" reported on the Overview page tends to change. It says 300 Mbps now, but it will drop down to 56 Mbps at times.
  2. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    Your measured throughput is entirely consistent with the expected behavior of wireless N. I suggest reading a bit more about overhead and theoretical maximum transfer rates for 802.11g and 802.11n, and maybe reading the FAQs or other sources on wireless transfer rates. Wireless has its place, but it's not ideal if you need high throughput, low latency, or freedom from dropouts or variable connection quality.

    The variable connection rate on the devices list is sometimes related to variable connection quality, but there are other factors as well. For example, some clients drop the negotiated rate to a minimum when there's no data being exchanged, but increase the rate when you start to download or upload.
  3. darksky

    darksky Addicted to LI Member

  4. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    No problem. Great throughput on the NAS by the way - I'm a bit jealous.
  5. darksky

    darksky Addicted to LI Member

    GigaLAN backbone is a sweat thing. No SSDs, just 7200 RPM Seagates.
  6. gfunkdave

    gfunkdave LI Guru Member

    I would ensure your wireless network is set to use WPA2 + AES only. If something does connect using WPA, it will fall back to 802.11g speeds.
  7. darksky

    darksky Addicted to LI Member

    Under basic>network I have:

    Security: WPA/WPA2 Personal
    Encryption: AES

    I changed it to:
    Security: WPA2 Personal
    Encryption: AES
    No change in throughput.
  8. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    Last things to try, if you haven't already, are increasing transmit power and switching to 20MHz channel width. Connection rate will be a lower number at 20MHz but application level throughput may improve.
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