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TheHox

join:2012-05-31

Airview possible noise help

Click for full size
Since I'm still learning, I do not know how much noise on airview is considered a problem or not.

The speeds on my nm5 link have been sketchy, so I did an AirView and noticed a spike in the middle of my freq, at 5,750.

My AP is setup at 40mhz wide at 5,745.

That spike is not my AP correct? And is that spike strong enough to cause me problems?


viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA
Looks to be 20 Mhz wide and stepping on you.. What happens if you set your AP to 10 MHz wide and do a Site survey you might see who it is on the off chance they are using UBNT or Mikrotik gear..

I know I have used site survey before and found ruckus gear that Time Warner had deployed on poles recently

TheHox

join:2012-05-31
reply to TheHox
Click for full size
Well I didn't see anything in site survey. But then again, for some reason I don't even see my own AP in site survey. Hide SSID is NOT checked but I don't see it, I have seen others.

I changed my AP to 5,775 at 10mhz. I let the airview run longer which that helps make things stand out I see.

For 10mhz width that sure does have a lot of noise hanging over.


WHT

join:2010-03-26
Rosston, TX
kudos:5
AirView is SSID. radio. protocol. manufacture agnostic. It will see an AP with/without SSID and Canopy emissions.


Inssomniak
The Glitch
Premium
join:2005-04-06
Cayuga, ON
kudos:2
reply to TheHox
That tiny little spike should have little impact, its really weak and narrow but you should be able to set 40mhz wide at 5775. Also you can try 30mhz, it doesnt use an extension channel like 40mhz does, and a bit better power density and less prone to noise. But depends on what speed you want to move thru the link. If you want to see close to 100 megabit probably should stay 40mhz.
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OptionsDSL Wireless Internet
»www.optionsdsl.ca

TheHox

join:2012-05-31
reply to TheHox
Well a little update on my issue.

As Inssomniak said, the spike has very little if any impact. I've been running 30mhz at 5775 with no issues, usually.

Everything will run great, I max out my 50mbps connection. Ping times are great.

But twice now, the 2nd just occurred now. I come to my PC to find I can't navigate to websites and my ping times are about 2x what they are, some timeout.
I can ping 8.8.8.8, but again pings are 2x as normal.

I look at my radio which is the station side of my link, and the air max quality and capacity are VERY low. I rebooted my station, and it would then not re associate with the AP.

I was able to log into the AP via my cell phone/internet, I rebooted the AP, and everything came back online and is fine again.

Anything to look for?


Inssomniak
The Glitch
Premium
join:2005-04-06
Cayuga, ON
kudos:2
You could try setting a manual ack 20% greater than actual.
I find that some links get sleepy if idle for a while.
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OptionsDSL Wireless Internet
»www.optionsdsl.ca

gunther_01
Premium
join:2004-03-29
Saybrook, IL
reply to TheHox
So you have more spectrum to use.... Why don't you just change the channel and not worry about it?

The AP should be the side most easy to reach. It doesn't matter in a bridged configuration which side is the AP or Client. (it doesn't matter in a routed one either lol)
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»www.wirelessdatanet.net

TheHox

join:2012-05-31
I was trying to go in the middle of them and completely avoid the two. Yes I can move in any direction and go on top of them if that would help but I don't see how so.

LLigetfa

join:2006-05-15
Fort Frances, ON
kudos:1
reply to gunther_01
said by gunther_01:

The AP should be the side most easy to reach...

Agreed. On a PtP link.

TheHox

join:2012-05-31
reply to TheHox
Looking over the logs, I see these message repeating a lot.
I've noticed a few dropped connections as well.

un 15 23:20:58 wpa-supplicant: Authentication with xx:xx:xx:xx:xx:xx timed out.
Jun 15 23:21:03 wireless: ath0 Scan request completed
Jun 15 23:21:03 wpa-supplicant: Trying to associate with xx:xx:xx:xx:xx:xx (SSID='UBNT' freq=5765 MHz)
Jun 15 23:21:03 wireless: ath0 Set Mode:Managed
Jun 15 23:21:03 wireless: ath0 Set Frequency:5.765 GHz (Channel 153)
Jun 15 23:21:13 wpa-supplicant: Authentication with xx:xx:xx:xx:xx:xx timed out.
Jun 15 23:21:17 wpa-supplicant: Trying to associate with xx:xx:xx:xx:xx:xx (SSID='UBNT' freq=5765 MHz)
Jun 15 23:21:17 wireless: ath0 Scan request completed
Jun 15 23:21:17 wireless: ath0 Set Mode:Managed
Jun 15 23:21:17 wireless: ath0 Set Frequency:5.765 GHz (Channel 153)
Jun 15 23:21:27 wpa-supplicant: Authentication with xx:xx:xx:xx:xx:xx timed out.
Jun 15 23:21:31 wireless: ath0 Scan request completed
Jun 15 23:21:31 wpa-supplicant: Trying to associate with xx:xx:xx:xx:xx:xx (SSID='UBNT' freq=5765 MHz)
Jun 15 23:21:31 wireless: ath0 Set Mode:Managed
Jun 15 23:21:31 wireless: ath0 Set Frequency:5.765 GHz (Channel 153)
Jun 15 23:21:41 wpa-supplicant: Authentication with xx:xx:xx:xx:xx:xx timed out.
Jun 15 23:21:45 wpa-supplicant: Trying to associate with xx:xx:xx:xx:xx:xx (SSID='UBNT' freq=5765 MHz)
Jun 15 23:21:45 wireless: ath0 Scan request completed
Jun 15 23:21:45 wireless: ath0 Set Mode:Managed
Jun 15 23:21:45 wireless: ath0 Set Frequency:5.765 GHz (Channel 153)
Jun 15 23:21:55 wpa-supplicant: Authentication with xx:xx:xx:xx:xx:xx timed out.
Jun 15 23:22:00 wpa-supplicant: Trying to associate with xx:xx:xx:xx:xx:xx (SSID='UBNT' freq=5765 MHz)
Jun 15 23:22:00 wireless: ath0 Scan request completed
Jun 15 23:22:00 wireless: ath0 Set Mode:Managed
Jun 15 23:22:00 wireless: ath0 Set Frequency:5.765 GHz (Channel 153)
Jun 15 23:22:10 wpa-supplicant: Authentication with xx:xx:xx:xx:xx:xx timed out.
Jun 15 23:22:14 wireless: ath0 Scan request completed
Jun 15 23:22:14 wpa-supplicant: Trying to associate with xx:xx:xx:xx:xx:xx (SSID='UBNT' freq=5765 MHz)
Jun 15 23:22:14 wireless: ath0 Set Mode:Managed
Jun 15 23:22:14 wireless: ath0 Set Frequency:5.765 GHz (Channel 153)
Jun 15 23:22:14 wireless: ath0 New Access Point/Cell address:xx:xx:xx:xx:xx:xx
Jun 15 23:22:14 wpa-supplicant: Associated with xx:xx:xx:xx:xx:xx
Jun 15 23:22:14 wpa-supplicant: WPA: Key negotiation completed with xx:xx:xx:xx:xx:xx [PTK=CCMP GTK=CCMP]
Jun 15 23:22:14 wpa-supplicant: CTRL-EVENT-CONNECTED - Connection to xx:xx:xx:xx:xx:xx completed (reauth) [id=0 id_str=]

gunther_01
Premium
join:2004-03-29
Saybrook, IL
reply to TheHox
Run a survey and airview on BOTH sides of that link. Find a channel that has the least amount of noise within your bandwidth. a 20Mhz noise source in the middle of your 40Mhz bandwidth, especially near the same signal level, is going to cause problems. Chances are you will have a more stable, and faster link using 20Mhz than 40 in your case having noise like that.

You may also need to switch AP and CPE roles just so the beacons don't get garbled up in the noise mess. (on top of the other reason I gave) Sometimes things work better one direction over the other.
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