Cisco Wireless :: AP1142 / Mitigating Noise And Vibration Interference?
Feb 17, 2012
I have a Cisco AP1142 Standalone AP at two of my locations. However both of these are being rendered useless every night and require a reeboot to correct the issue, because of the high level of noise and vibrations coming from the extremly loud bands that play there, Someone sugested an enclosure stuffed with insulation but Im afriad of overheating the AP.
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Jul 19, 2012
I have recently bought a wireless N 150 usb Dlink adapter, i have installed the software and have conected it to my router using WPS (I do not know the passphrase). The adapter is working excellent but when I added the adapter, my old SSID (Dlink) got switched to Dlinkelb7. Dlinkelb7 has full bars when the old Dlink only comes up so often with one bar. Since the switch of Dlink to Dlinkelb7 my xbox 360 adapter has a very hard time connecting to Dlink and it will not connect to Dlinkelb7 because it needs a passphrase. My router is also Dlink Model DIR-615.
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Oct 28, 2012
I have deployed AIR AP1142 model access points in various locations and some of them get their Radio0 going down intermittenly and the only way is to do a reload. The log just shows that the radio0 went down.
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Apr 5, 2012
There are two access points of Cisco AIR-AP1142 (4dbi, 2.4GHz). Settle down at height of 12 meters and at distance of 36 meters from each other. Whether will cover access points a zone on the earth in between? And on what distance on the sides?
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Sep 11, 2012
We have a small ofice in the 3rd floor of a building and we are using 2 access points Aironet 1130 URL
Since some time now the space has become really crowded with access points. 1 AP is on channel 5 and is almost unusable. The 2nd one on channel 11 has some APs to fight with and with smaller signall strenght.
I have been researching and read a bit about changing some access point parameters (RTS/CTS/timers) on a multi access point environment. I want to do that while waiting for 5GHz AP's (and because not all clients support 5GHz).
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Jun 29, 2012
I bought cisco AP (air-ap1142-e-k9) and we know this ap works with 802.11a/g/n same the description note on the package cartoon but my problem is when i configure that ap its work only with 802.11a/g i tries to make it works with 802.11n but fail .
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Jan 30, 2013
I have 2 1142 autonomous APs that I'm trying to set up for bridging. I have a building just across the street and these would work wonderfully to extend the LAN to that building for the few users that will be located there. The distance is only 200'. That's not my issue right now as I'm still in the lab trying to get these things to talk. I've been through the Cisco documentation on this and just can't seem to get them to work. Here are the requirements:
1. I'll have 2 or 3 vlans that will be used by clients
2. I'll have 1 VLAN for network management
3. I'm not using BSSIDs
4. Is it possible to utilize the 5ghz radio for bridging and still have your 2.4ghz clients be able to connect or am I required to set up bridging on both bands?
5. There's also this option for "workgroup bridging". Am I getting confused on this. I've read through it. It doesn't look like the way I need to do things.
I'm attaching the root side configuration. Version is 124-25d.JA2. The non root side is version 124-21a.JA1.
On the non root side, I get error "dot11-4-no_valid_infra_ssid: No infrastructure SSID configured. Dot11Radio1 not started.
Show ip int br shows reset for the dot11radio1.
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Jul 24, 2012
We have 4x AP1142 standalone APs in WDS mode with roaming and RADIUS from Windows AD for auth.Everything works as expected apart from two APs that frequently reset Dot11Radio0 interface. The other two are fine.
The config on all APs is identical, version of IOS is the same accross all APs (12.4(23c)JA3). The only way to get reset inteface back up is to "reload". [code]
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Sep 15, 2011
Two months ago I installed a WLC5508 with sw r7.0.116.0 and we installed 8 AP1142 as a start.
10 days the customer calls and says that the wlc logs error messages that says there is an IP-conflict with the management-interface. The conflict source is its own ip-adress!!! He reboots the WLC but the error message keeps coming. After a short while he notices that there are No APs on the WLC...!!!...
After some discussion I suggested that he should disconnect one of the two gig-ports of the WLC (LAG was enabled and in use). He did so and rebooted the WLC for good measure ... The IP-conflict disappeared but still no APs.....
In the DHCP-server (MS Win2003 server), in the AP-scope we also see that the "leased adresses" fills up with "BAD_IP_ADDRESS" (or the sort ... :-/ )
The setup is like this:
- WLC5508 running r7.0.116.0
- WLC has LAG activated and is connected to two different Cat3750G that are stacked
- The management if of the WLC is on the same subnet as the AP1142s, no other hosts on this subnet
- WLC management interface on own subnet as the only host (+ def gwy...)
- APs on their own subnet, no other hosts
- When the APs gets a IP-adress it is possible to ping them from the WLC!
- All VLANs/interfaces on the WLC is tagged, ie a "pure" trunk between WLC and 3750-stack
- Option 43 configured on the AP-scope
- All APs is connected via Power-injector (PWR-INJ4)
WLC5508 => LAG => 2x Cat3750G => TRUNK => Cat2960 with 1x AP1142 => TRUNK => Cat2960 with 6x AP1142
What we have done so far:
- Made sure the port-channel on the 3750-stack was configured: port-channel load-balance src-dest-ip
- Physically disonnected on port of the WLC
- Do "shutdown"on port gig-ports on the 3750-stack and "no shut" on only the one that is still physically connected to WLC
- Do "shutdown" on all AP-ports in the 2960-switches. Clear the lease-pool of the DHCP-server, Deactivate scope, Reactivate Scope and finally "no shut" on all AP-ports
Nothing worked, still no APs on the WLC.
I the connected my PC to the consloe of an AP that was easily accessible and powercycled it. The output can be seen below, the most peculiar was the line : " *Mar 1 00:15:53.351: %CAPWAP-3-ERRORLOG: Invalid event 38 & state 2 combination"
1. It worked initially but after the ip-address confilct and reboot of WLC no APs associate to the WLC. Why??
2. The error message on the AP console: "*Mar 1 00:15:53.351: %CAPWAP-3-ERRORLOG: Invalid event 38 & state 2 combination" What does this mean?
3. Since the AP gets an IP-address an it is possible to ping WLC -> AP, is there some freakish ogre in the Cat2960 that eats up the CAPWAP-packets??
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Nov 6, 2011
I would like to know if it is feasible to put those Aironet AP with internet antenna like AP1142 / AP1042 in a enclosure box (Like IP66 grade) box. Will those enclosure box absorb the Radio signal from the AP? or the Radio signal can still survive after passing the box but the Signal Strength be degraded only?
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Jul 30, 2012
I'm experimenting a strage issue with some AP1142 that prefer getting new IP from DHCP server rather than using the static ip already configured.
I've got more than a hundred of 1142 APs already conected to a 5508, all with static IP, all working fine for about a year.
As i installed 30 more AP, i enabled a dhcp scope on the controller to give IP to the new APs and when the new aps got registered i changed the configuration to static IP.
The problem comes when some of the older AP than have already static ip are gettig ip from dhcp scope.
If i look at my WCS, it reports that this APS are getting DHCP IP because they cannot reach the controller with their static ip. As this is impossible, because the static ip and the dhcp enable scope are in the same subnet in a layer 2 configuration and with the same gateway. (e.g: old AP 10.10.2.10/16; new AP(dhcp 10.10.3.10-50) 10.10.3.15/16; gw 10.10.254.1)
The problem comes when i disable the dhcp scope, all the older aps that got dchp ip from the wlc scope instead of using their staic configured ip are deregistered. If i reset every ap manually, from the swithc disabling PoE, they start to use the static ip and everything comes fine.
This is happening with about ten of fifteen APs from the 100 installed, that is the strange thing because this seem to be very random as the failing APs are installed in different building and connected to different switches.
As now i have disabled dhcp scope and all APs (old and new) have static ip everything is ok, but i will have to add some more APs shortly and every time i enable the dhcp scope on the wlc
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Sep 20, 2012
I installed a wireless adapter on my pc and since then when I play a game online or watch something online there will be times when the sound will be weird and noisy for a slight second along with the slowed visual. Also I noticed that it awakes the wireless printer from sleep mode. Could it the wireless adapter be interfering with the wireless printer? I tried to adjust wireless antenna but it didn't do anything.
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Sep 13, 2011
I have just replaced my 54Mbps Wireless-G router (Sky Broadband/Netgear - black, looks like a SkyHD box) with a 300Mbps Wireless-N TP-Link TD-W8960N router, I have also upgraded the the standard 3dBi antennas with a pair of TP-Link ANT2408CL 8dBi high-gain anetnnas.
However when using various WiFi analysis apps I'm getting a signal strength averaging -35dBm and noise of -96dBm when in the same room as the router. But the main bit confusing me is that this is in ALL configurations - with my old Wireless-G router, with the new Wireless-N w/ 3dBi antennas, and with the new Wireless-N w/ 8dBi antennas.
Am I misunderstanding the signal/noise thing or is this Wireless-N router not giving me a better signal at all? I plan on installing an identical setup in a property with patchy Wireless-G coverage next week and I was hoping this exact kit would be the solution.I have tested with two laptops and I am getting 130Mbps link with both, but I understand this is typical of laptop hardware. I don't have any devices with a certified 300Mbps card installed to test with.
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Apr 30, 2013
We're getting complaints about a specific 1131AG in the field only being intermittently accessible. WCS shows both the a and b/g interfaces randomly bouncing, sometimes the reason for the bounce is unknown other times it says it's because it lost connection to the controller. I can ssh into the WCS but the engineer who setup the AP's doesn't seem to have enabled remote access via telnet or ssh.
We are also seeing these events:
802.11a interface of AP * is down: Controller 172.17.0.10 Reason: Max retransmissions for the AP have reached.Interference threshold violation reported by '802.11b/g' interface of AP *, connected to Controller '172.17.0.10'.I know I can adjust the threshold percentage, but that would only seem to mask the issue.WCS gives this version info on the AP:
Versions
<DIV style="DISPLAY: block" id=versions mcestyle="display: block;">
Software Version
6.0.202.0
Boot Version
12.3.8.0
[code]....
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Feb 20, 2012
Just today i've started having problems with my Wireless Network. Other adapters in my area are causing me to get random disconnects every few minutes.I've tried changing the channel on my router several times, but to no avail. Is there anything else worth trying?
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Mar 5, 2012
So I use Shaw as my ISP, with the dlink DIR-655 as my router.Originally I was using the DPC3825, and started noticing some nasty signal fluctuations on my phone and wii (would go from 5 bars to 1 bar, causing netflix to drop out, games to disconnect, phone browsing to stop completely, etc) which is why I bought the DIR-655. I have been looking for sources of RF interference.I do not own a microwave, all the electrical work in this house is brand new, I have no neighbors (live in middle of a forest). I have tried positioning, every wifi channel, building an aluminum satellite dish to direct the signal where I want it to go. I've had it in every room in the house, I've unplugged the fridge and all other RF electronics (cordless phones, etc), and the issue remains.
So what the heck is going on here? Does my house hate wifi signals?I was thinking maybe dirty power, but my house has emergency power batteries that run 24/7. Any dropouts or flickers aren't even noticed by the system. url...This is a picture of the path between the router and my roku box/wii/phone.The router is 1 inch below the camera screen, and the roku box is in the far room. it's 30 feet.what can cause severe fluctuations at 30ft?
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May 21, 2011
I have Wireless-G 2.4ghz 54Mbps (Linksys WRT54G) working perfectly short range. But have no connection when I'm in room about 80 ft from router and have doors to rooms closed. Partitions in home are concrete block, not sheetrock. Should I get a new N router? Is there a repeater or booster that will do the job? Or connect existing router to new router in other room with ethernet cable going outside then over roof of house then inside to room?
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Oct 4, 2012
i want to Use Cisco AP 1142 in my network. Also new to the enterprise edition AP.I have configured AP WEB mode the SSID and able to connect without the Security Key. Also want to enable MAC Address filter on the AP. Any configuration details on web and CLI Mode.
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Nov 19, 2012
Prior to upgrade AIR AP1142-N (Version 12.4(25d)JA1) everything worked fine! After upgrade IOS (to new Version 15.2(2)JA) without any config modification, management interface (encapsulation dot1q 33) or any IP interface with encapsulation dot1q became unreachable... If set IP on SVI (or BVI) with native VLAN (encapsulation dot1q 4094 native), this IP is reachable. Probably, there are bug in new IOS and Dot1q encapsulation? (see 'tech-support' in attached files)
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Jan 1, 2013
What size fans these are and/or had experience replacing them with something quieter?
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Jun 25, 2011
I've bought a new Cisco 886VA and want to set the noise-margin value. With my old 876 I had to set "service internal" and then I was able to configure the value unter ATM inter config.
But with the new 886VA I can't find a way to configure it.
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Jun 20, 2011
I just purchased a Netgear router and installed it like it said on the directions. I have internet through Time Warner Cable. I did have a crappy phone before I got the router and it made a popping noise on it too, but I got a new phone and it was fine. But after I installed the router the phone makes a popping/clicking noise and it will also disconnect the wi-fi signal and I have to restart the router.
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Jan 19, 2011
Every 30 minutes we get a constant beeping noise from our router that lasts about a minute.
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Mar 13, 2012
In official information for SG300-28p noise level is 40.6 dB, but in fact its too noisy. Is it possible to change speed of fans? I use only 8 PoE ports.
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Feb 16, 2011
The WAG120N makes a cracking noise on the conventional telephone.
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May 4, 2012
Are there any manuals on how to open the srw224g4p switch? I can't find anything the switch is making a lot of noise - sound like the fan.
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Nov 29, 2012
I have an application, a solar power plant, where communication cables (Cat.6 UTP) are run close to power cables. We've had a lot of failures in the past due to multiple reasons, electrical noise, surge, etc so we decided to change to Cat.6 SFTP. The problem is that now , even with proper termination of the shielding at either one or both ends, the noise is so bad that packet loss is above 90%.
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Mar 12, 2013
Comparing my brand new linksys x3000 (Firmware Version:v1.0.03) with my old zyxel p660hw I see that the linksys is running a downstream noise margin of 8.2dB while the old zyxel is running a downstream noise margin of 15dB. Needless to say, I am very disappointed. why the linksys value should be so much lower?
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May 2, 2012
So this problem seemed to come out of nowhere, I have no idea why it started. Basically, when I use my internet, eg: opening link, loading video or downloading randomly my speakers make a grinding noise and until the noise stops (can be 1-10 seconds) my internet drops (the internet icon on the bottom right shows it is still connected but nothing loads until the noise stops. Even then, the noise can drop in and out like 10 times in a minute and is constantly messing up the internet.
my speakers are Logitech (doubt that makes much difference as I doubt the problem is linked to them and my LAN card is some Ralink thing, nothing special. Here is a low volume recording of the noise, turn up your speakers to hear it well.
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May 9, 2013
This has been driving me absolutely crazy but I am glad to have found the source of it. Over the past 4-5 weeks ever since i built my new computer, my computer has always had this wierd high pitch noise. I dont know if its coil whine or not, but the sound signature is def not the same as the coil whine that comes from my 7970 card. It sounds more digital.
What could be the cause of this? And what would the remedy be? My ethernet cable is approx 60 ft so it will be a pain in the ass to replace. Or buy another NIC?
edit: forgot to mention....the noise is constant. Not intermittent with usage. No amount of load or idle on the network changes the noise.
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Mar 1, 2007
my wap54g is not working even i hold reset butoon for 60 second it not woring even my linksys wap54g reset button is not work for reset it, It not do any thing and still i cant accest is web interference
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Oct 29, 2012
I have a Netgear WNR3500L wireless router. I assume it's v1 because on the back it doesn't have "v" anything. Firmware version V1.2.2.44_35.0.53NA.When I connect using g I get 22+Mbps download speed. When I connect using n I get 10 Mbps. I've tried using both WPA2 only (laptop reports 130 Mbps connection I believe) as well as the combo WPA+WPA2 (laptop reports connection of 117 Mbps).Broadband download results don't change - they stay at the 10 Mbps level. I've fiddled with some of the settings on my laptop's wireless card - but the results are the same.For now I'm just trying to figure out where I should focus my investigation and fiddling efforts - on the laptop or on the router.
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Jan 6, 2013
i have a Netgear N600 Wireless ADSL2+ router on wireless a/b/g/n dual band and all that but what i want to know is will i get better performance if i use a WirelessN card over G on a 10 - 15mb/s connection gaming wise and will it b a great increase over the G causeif its not a HUGE increase then i wont waste my money on a newer card?
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