# Wireless issue **URL:** \ **Category:** Chatting over the Back Fence\ **Created:** [September 3, 2014, 1:16am UTC](https://forums.suse.com/t/wireless-issue/26033 "2014-09-03T01:16:23Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![System1](https://avatars.discourse-cdn.com/v4/letter/s/51bf81/32.png) [@System1](https://forums.suse.com/u/System1)\ **Post date:** [September 3, 2014, 1:16am UTC](https://forums.suse.com/t/wireless-issue/26033/1 "2014-09-03T01:16:23Z")
Anyone here using Ubiquiti NanoStation pt to pt wireless access points? We have a couple here at a couple sites that are 0.4 miles away (per the access points). Got a connection set up, works great (replaced a T-1 here). Have an issue where the wireless acts like it drops twice a day. It’s only down for a minute or two and comes right back up, but devices there get dropped. It’s on about a 12 hour rotation, but it’s quite regular. Devices don’t lose uptime, just the wlan seems to drop. The logs on them don’t show anything specific. Any suggestions? – Stevo ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [September 3, 2014, 2:46am UTC](https://forums.suse.com/t/wireless-issue/26033/2 "2014-09-03T02:46:13Z")
We use their NanoBridges for backhaul to most of our sites. First thing that comes to mind is something that blocks the fresnel zone - maybe a truck? One of our redundant links is a little too low - occassionally it gets blocked when 20’/40’ containers get stacked up high in the way of its path. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [September 3, 2014, 4:40pm UTC](https://forums.suse.com/t/wireless-issue/26033/3 "2014-09-03T16:40:13Z")
Scott Campbell sounds like they ‘said’: [color=blue] > We use their NanoBridges for backhaul to most of our sites. First > thing that comes to mind is something that blocks the fresnel zone - > maybe a truck? > > One of our redundant links is a little too low - occassionally it gets > blocked when 20’/40’ containers get stacked up high in the way of its > path.[/color] So my response to Scott’s comment is… Nope, clear line of sight between these two. One of the times the wireless goes haywire is around 3:45am when this place is locked down to even vehicle traffic. – Stevo ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [September 4, 2014, 2:54am UTC](https://forums.suse.com/t/wireless-issue/26033/4 "2014-09-04T02:54:40Z")
Stevo wrote: [color=blue] > So my response to Scott’s comment is… > > Nope, clear line of sight between these two. One of the times the > wireless goes haywire is around 3:45am when this place is locked down > to even vehicle traffic.[/color] JFYI: Fresnel zone != LoS So you can have a clear line of sight but still encroach on the fresnel zone. When the links drop take a look at airview(?) IIRC that is the tool built in to airOS which will show noise across the frequency. You’ll need to do so before hand (it will cause a drop in the bridge) and monitor during the event but if you suddenly see a burst of noise you’ll have an answer. You may need to do it from one end for one event and then the other end to get a picture as to what is happening. Or, for the sake of a hundred bucks you could replace the kit at both ends and see if that solves the problem. If it doesn’t then you know you probably have something at one of the sites generating noise… ---
**Author:** ![system](https://us1.discourse-cdn.com/flex022/uploads/suse/original/2X/5/5012ba89e3ffb5220dac47d5ea0ba032e2fe1cb6.png) [@system](https://forums.suse.com/u/system)\ **Post date:** [September 6, 2014, 1:52am UTC](https://forums.suse.com/t/wireless-issue/26033/5 "2014-09-06T01:52:05Z")
Scott Campbell sounds like they ‘said’: [color=blue] > JFYI: Fresnel zone != LoS > So you can have a clear line of sight but still encroach on the > fresnel zone. > > When the links drop take a look at airview(?) IIRC that is the tool > built in to airOS which will show noise across the frequency. You’ll > need to do so before hand (it will cause a drop in the bridge) and > monitor during the event but if you suddenly see a burst of noise > you’ll have an answer. > > You may need to do it from one end for one event and then the other > end to get a picture as to what is happening. > > Or, for the sake of a hundred bucks you could replace the kit at both > ends and see if that solves the problem. If it doesn’t then you know > you probably have something at one of the sites generating noise…[/color] So my response to Scott’s comment is… Thinking it was STP enabled on the APs… Will know for sure Monday morning. – Stevo