I have a moderately complex network at home, with multiple WiFi base stations (running at 5 GHz and 2.4 GHz), a hacked WRT54G gateway router for firewall/VPN, and a couple of AirPort Express units for music streaming.
Starting a couple of weeks ago I started having all sorts of erratic behavior with the AirPorts, which was extremely annoying since I was trying to evaluate Airfoil, an audio streaming application, for TidBITS. Lost connections, disappearing access points, and other nonsense. It hit the point yesterday afternoon where I reconfigured my entire network, yanked out the VPN, and, in the process, killed everything.
Waking up with a little 4 am insomnia I tries a quick fix I’d forgotten about- changing WiFi channels. A couple of years ago I had similar problems and after doing a site survey with Kismet I realized my access point was on the same channel as a neighbor. This time I skipped Kismet and just swapped channels on my 2.4 GHz (802.11g) access point.
All is good. I’m going to bed now. One of our new neighbors must have been on channel 8, and everything is happily connected on channel 7 now. If you find yourself dropping connections or having other weirdness, just go into your access point configuration panel and hard code different channels until things start working better.
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3 Replies to “Quick Wireless Tip- Change Channels To Improve Reliability”
And by “on the side of your house” I mean on the inside of the same wall your neighbors are closest to. Just for clarification…
A quick note… Channels 1/6/11 are the only channels that don’‘t overlap in traditional 802.11b/g. So being on channel 7 with your neighbor on channel 8 may have helped a little, but in the end you’‘re still going to be getting interference. The 5GHz stuff is nice and with the Extreme I just let it autoselect the channel for me, the older 802.11b/g stuff wasn’‘t as robust in that arena.
Since you are using a hacked 54G, I would assume you’‘re running DD-WRT or OpenWRT, you can effectively zone our your neighbors with some of the timing options and some well placed antennas. Your best best is to get some directional panels and place them on the side of your house of your offending neighbor and shoot them in and down and in and up (since you have a 54G you have two connections available). If you have any class of HAM radio license you can actually tell your neighbor to cease using that channel by law. 🙂 Although, you won’‘t make any friends that way I guess. Hammers have first precedence to public spectrum—which is probably the main reason I got my technicians class oh so many years ago… CQ CQ! 🙂
Living in an apartment complex, I run into this issue all the time. It seems that every time someone new moves into the building, I have to reconfigure things. My solution, now, is much easier. I purchased an SMC router/firewall/wireless AP. It automatically sweeps through the channels at boot up and picks the best one. The big thing is just remembering to power cycle the device every month or two so it will rescan.
My other tool for troubleshooting this scenario is adding a wireless scanner widget onto my Mac Mini. The mini has a very strong wireless capability built-in (both wifi and bluetooth – a patch once re-enabled bluetooth and my phone detected it 3 rooms away), which combines well with the simple Dashboard widget. Makes for convenient channel checking and signal strength metering. No fiddling with kismet or airsnort or netstumbler is then required. 🙂