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Newbie with RT-N16, wireless setup

Discussion in 'Tomato Firmware' started by MikeBuzz, Jan 6, 2011.

  1. MikeBuzz

    MikeBuzz Networkin' Nut Member

    I have just bought a N16, and have so far managed to flash with Tomato Firmware v1.28.7440 MIPSR2-Toastman K26 USB Ex

    the question i have is that the wireless speed reported on my laptop drops from anywhere between 150mbps to 2mbps, what setting do you recommend i should be using to get the best possible signal

    i have read the following by toastman but still a little confused :(

    http://tomatousb.org/tut:increasing-wrt54g-transmit-power


    this is what is reported on the status page

    MAC Address E0:CB:xx:xx:xx:xx
    Wireless Mode Access Point
    Wireless Network Mode Auto
    Radio Enabled
    SSID Private
    Security WPA2 Personal (PSK) + AES
    Channel 6 - 2.437 GHz
    Channel Width 40 MHz
    Interference Level Severe
    Rate 11 Mbps
     
  2. MikeBuzz

    MikeBuzz Networkin' Nut Member

    could anyone paste their wireless advance setting for a RT-N16??
     
  3. Toastman

    Toastman Super Moderator Staff Member Member

  4. MikeBuzz

    MikeBuzz Networkin' Nut Member

    what points should i be looking at within inssider??


    this is what i get


    [​IMG]
     
  5. Toastman

    Toastman Super Moderator Staff Member Member

    BTopenzone and other BTxxx being on ch7 has effectively wrecked operation in the center of the band. Why are these BT things on channel 7?

    11 is reasonably OK, but will get some interference from BTopenzone on channel 7

    Buzznet is using 40MHz channel and will also interfere with other routers over a wide range. Look at the graphs and you'll see better. It is quite strong with you. Effectively BTxxx and Buzznet have wiped out the centre of the band.

    Channel 1 is the best channel based on what yuou have posted, the routers on channel 1 seem to be weak and should not cause any problems. You could also try channel 12.

    http://www.linksysinfo.org/forums/showpost.php?p=367889&postcount=7
    http://www.zdnet.com/blog/ou/80211n-draft-20-gear-still-a-neighbor-killer/555?tag=rbxccnbzd1
     
  6. MikeBuzz

    MikeBuzz Networkin' Nut Member

    I have no idea why they are on channel 7, the neighbours must have set them up in that way :(

    Buzznet is my router, should i change from 40mhz?

    i will have a read of those links, thanks for the help
     
  7. Toastman

    Toastman Super Moderator Staff Member Member

    I think if I were you, I would use 20MHz and channel 1.
     
  8. MikeBuzz

    MikeBuzz Networkin' Nut Member

    Thanks will try that when i get home, can i ask what firmware you run on your RT-N16's? and what power setting?
     
  9. MikeBuzz

    MikeBuzz Networkin' Nut Member

    is it not possible to get 300mbps using channel 1?
     
  10. Toastman

    Toastman Super Moderator Staff Member Member

    Yes, it may be, but your problem is you have a lot of stuff locally which may cause you interference. If you use channel 1 with 20MHz you seem to have a pretty clear channel. The moment you try to use a 40MHz band, you will receive interference from channels 6,7 - the stuff in the middle of the band. And vice versa - you will interfere with them too. You might find it better to make a compromise, do things slowly until you know what is going on. Using the graph function in Inssider should make it very clear that the channels overlap.
     
  11. MikeBuzz

    MikeBuzz Networkin' Nut Member

    This is the latest capture, using channel 1 and 20mhz is working fine, have coverage through the full house, have set the power at 60 seems to give me a rssi of -50 through the whole house, i take it that the lower the rssi figure the better?


    [​IMG]
     
  12. Azuse

    Azuse LI Guru Member

    No he means the channels graph i.e. the curved ones.
     
  13. MikeBuzz

    MikeBuzz Networkin' Nut Member

  14. Toastman

    Toastman Super Moderator Staff Member Member

    Yes, the lower the better, your signal at -30dB is extremely good. You are sharing channels with two other TALKTALK routers, but they are much weaker. What will happen is that since all 3 routers are on the same channel, they will correctly identify each other as data transmissions and will wait for each other to finish sending before they transmit. Thus avoiding interfering with each other.

    From the bottom graph you can see how "fluffyudders" has taken up 2/3rds of the whole 2.4GHz band and is probably causing severe interference to all those in the centre. He's probably also got poor throughput!

    Anyway, you've got it now, you can experiment a little. Good luck!
     
  15. MikeBuzz

    MikeBuzz Networkin' Nut Member

    Thanks for all the help, will now just tweak the base settings i have, thanks once again
     
  16. Toastman

    Toastman Super Moderator Staff Member Member

    Oh, maybe it's also worth mentioning, not just for you but for anyone else reading this later. Don't forget that for every router you see, there may be several or many clients. The clients don't show in the graphs or on a router's display, but they ALSO contribute to all of the interference. As an example, take what I have here, there are 3 condo blocks locally, totaling maybe 40 AP's - and based on my experience I would say around 400+ users that can't be seen. That's 440 transmitters on three channels. It's actually rather remarkable it gives any throughput at all, isn't it?
     

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