Cisco Wireless :: 4402 Wireless Network Unstable
Dec 10, 2012
I had problem with my wirless network. My network had wireless controller 4402 (version 5.2) and some AP 1130AG and using power injector supply power for AP. I setup AP radio with 802.11 b/g/n 2.4GHZ. but my user complaint about 2 problem with the laptop distance AP 5 meter
- Speed of wireless card on laptop often change from 11 Mbps to 18 Mps or 36 Mbps and unstable.
- Ping from laptop to server had lost 20 % packet When I ping wired connetion to server this is recceived 100%).
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Aug 21, 2012
Before I put in place any network security appliance POC, my wireless network worked fine.Note: ethernet works fine all the time and confirm my internet is okay too. Just wireless.
First time, I got Palo Alto vendor to setup POC. It screwed up my wireless. We removed on 1st day itself and re-configured everything all over again.Now before holiday break, Sonicwall vendor setup POC for us. It worked fine though for 1 week and now the wireless gone crazy again.
3 bars, 2 bars, 5 bars, sometimes no bar.Then when there's POC, my guest wireless network will dead too.
I can't figure out the problem and what's causing such instability?If I understand correctly, this is how my network works:-
sonicwall nsa 2400 (router 192.168.1.1)
cisco linksys wireless (before sonicwall, we used this as router. Now used as wireless access point).
tp-link 48-Port 10/100Mbps + 4-Port Gigabit Web Smart Switch
is there anything in particular I should take note about? or any tools to analyze my wireless network problems?
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Jul 23, 2012
I recently replaced my old WRT54G router with a E3200 router.
Unfortunately, ever since my wireless network is a lot more unstable than before. I very often experience serious lag spikes and drops in speed. Very often I experience serious lag for a couple of seconds after which everything returns to normal. I notice this the most in online gaming, but it is also noticeable while browsing the web. When downloading large files (e.g. steam games), the download speed also seems to suffer from this by dropping every now and then.
There are no connection drops however. And it only seems to affect the wireless network.
I have configured the E3200 router manually using the Web UI and is has been configured exactly the same as my WRT54G: i.e. only 2.4GHz band enabled with b/g/n, WPA2 security, MAC filtering on, no throtling/parental control/port forwarding, UPnP disabled. The E3200 is in the exact same place as the the WRT54G was.
Things I have done so far for troubleshooting: I used inSSIDer to monitor the wireless network and it's signal strength seems about the same as the WRT54G. I changed channels for best signal strength (there is only one other wifi network that seems to be configured as a dual channel N network; 3 other networks with very low signal strength) and have tried every channel.
I updated the fimware to the latest version (Ver.1.0.04 (Build 1)) and did a factory reset and power cycle afterwards.
I noticed that switching channels can account for 5-10Mbps differences in internet speed. Something I never noticed with the WRT54G. The lag spikes occur more often on some channels than on others. This seems not related to the speeds I get on the channel.
I really can't imagine that a router marketed as High Peformance router with superior speed and superior range is less stable than my old WRT54G router.
Is there something I can do to improve stability of this router?
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Mar 11, 2013
We have two WLC 4402 WLC in active-active mode in our setup. The issue we see is that a user/laptop gets connected and gets the ip address but there will be no network access. We see a yellow exclamation sign at this time in network icon in tray and we can not ping gateway at this point. We have run debugs at this time for the machine and we could see that was in "RUN" state its only that the machine can not access network.
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Nov 4, 2012
we have a two port 4402 WLC here with only one port currently in use. The topology is bacically the used port uplinks to a dmz switch. Our Intranet and the Internet are accessed via an ASA from the WLC. The WLC also sits in the DMZ. This WLC is only used for guest wireless access. The AP information and traffic is exchagned from a primary WLC on our Intranet and authentication is done via RADIUS. Internet access is handled through the ASA as well on the DMZ. We have a completely independent ISP broadband connection here that was put in long before I was ever here and is used for guest wired web access. All ports are clearly labelled and have bright pink patch cords. What I would like to do is have our wireless guests be on that network rather than our dmz for their web access. I have pulled an ethernet cable from the switch that connects to that broadband connection to the cabinet with the 4402. So the physical is fine right now. I'm not all that familiar with the WLC's, so I'm not sure if everything else can remain the same as it is right now, but just connect the second port to the broadband connection and route guest Internet traffic through there rather than the DMZ.
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Aug 26, 2012
I have this guest wlan working with web authentication, as you may know in order to get authenticated you must have an IP address first then have a valid username and password. The problem is that if you don't have valid credentials you keep the IP address anyways.I'd like to know if there is a way to release the IPs that are not being used? The WLC is the DHCP server for this network.
-WLC4402
-6.0.202.0
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Jun 29, 2011
I would like to know if exists some configuration using a WLC 4402 that deny network acces to smartphones but not to netbooks and laptops.
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Dec 20, 2010
Our head office has two 4402 wireless controllers 16 AIR-LAP 1142 access points in the office. we've just bought an AP541 for one of the regional offices. What I want to know is can I 8inergrate the AP541 into the wireless network with the 4402 so I can administer from a central site and so the wireless users will be active at the regional site connected to the WAN.
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Dec 6, 2011
I've got 3 WLC 4402 controllers and the wireless is working perfectly except for 1 issue. We are trying to connect an apple tv, so we can stream picture, videos etc from ipads and Macbooks to a large display for media teaching.The setup works at home, but not at work.The apple TV is on the same network as the wireless apple devices, (we use a 10.6.4.x-10.6.5.254 range), both are dhcping the addresses (have tried fixing but that made no difference). I've enabled multicasting and igmp snooping and set the multicast address as 239.0.0.0 and it still doesn't work.
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May 23, 2011
We have WLC-4402 and LWAP-1510, we have issue when users trying to connect to pppoe server with pppoe connection from wireless network. On LAN, pppoe connection work properly and everything is normal. Also I enable broadcast fowarding on GUI but he problem still exist.
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Nov 19, 2012
We need to add additional APs to working wireless mesh network (WLC 4402, 1520 series AP).
WLC 4402 supports 1550 series access points with firmware upgrade to 7.0.235.0 :
[URL]
Is AIR-CAP1552E-x-K9 with three external dual band antennas enough for 2-GHz b/g/n local access and 5-Ghz back haul?
Does 1552 Mesh AP work with 1522 Root AP?
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Dec 25, 2011
I assign private IP for each PC within LAN. And DHCP is in charge of wireless connection since 192.168.0.100 for 10 clients. ,Web setup access is also disable for wireless connection.When a notebook connect to WRT54G via wireless. Private IP is always out of range and it could accesses web setup.What happen to my WRT54G ?
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Jun 11, 2012
I am currently seeing some stability problems with a 2504 WLC and a wireless bridge (Netgear WNCE2001 to be exact). The wireless bridge can connect to the network, but is very unstable. It will disconnect after 5 - 60 minutes of operation.
I believe part of the issue is that the bridges, when associated, do not show up as a WGB according to the WLC.
Any WGBs that are known to work well in a controller based environment? The WLC is running 7.0.220.0 and the APs are 1142s and 3502s.
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Mar 1, 2009
I am having trouble with an pair of WAP200E's. The bridge between them stalls, found that one of the AP wireless LED don't show any activity. After powercycle the stalled AP, the bridge works again for a day or two. Have tried to replace the AP's still the same issue
Firmware is 1.20a
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May 31, 2011
I recently moved back home with my desktop that use to be plugged in via ethernet. I bought a PCI Wireless card and I have been having problems connecting to and staying connected with the network. Once I am connected the connection speed is very slow. I have tried reinstalling windows and my card several times, even going to the store to swap it out. I have a feeling that one simple setting is changed, but I can't figure out what it is. I am currently on a laptop that is also running windows 7, but has none of the problems of the desktop. I tried to run the Netalyzer program on the desktop, however, the network disconnected as soon as I tried. Here is the link to the results from my laptop that is connected to the network: ICSI Netalyzr — Results
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Jul 10, 2011
So my issue has been going on for a while now a while after I replaced the router from a DIR-535(If I recall) to a DIR-635. Now the problem resides in my computer however as it would seem that I randomly tend to loose internet acces and it only applies to my computer in the form of obviously loss of internet and the horrid warning triangel in the corner. I've tried removing and restarting the connection without any succes, I also tried to do a ipconfig /release /flushdns and /renew but it didnt seem to do anything either, basically been throwing attempts at a wall to see what works.
As far as the actual card goes it's a Atheros AR9285 Wireless Network Adapter.
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Jan 14, 2013
I bought a Netgear N600 wireless adapter (WNDA3100).I used wired before mostly without problems but was annoyed by the cables.My router is a Netgear WNDR3300 and I never had problems with it.The problem is that sometimes my wireless adapter just stops working and drops the connection.I use it since a few days, and it already happened several times.It happened especially when I was streaming videos to my PS3 (my PS3 is also wireless). It also happened while I was watching Youtube videos. When this happens, I need to unplug the adapter and plug it again. Sometimes, I need to restart the whole computer for my adapter to work again.Is this normal with USB wireless adapters? This is unacceptable to me.I want a stable connection.
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Dec 29, 2011
I recently found that whilst using my WIRED connections, web pages have been opening slower at times. My ping times to google.com usually is around 72-84 ms which I continue to get if I hook up the cable modem directly to the PC. As soon as I utilize the Linksys router, I start getting higher ping times anywhere from 72-300 ms. Firmware version is 1.5.01 which I recently upgraded to. I tried resetting and so on. Is there an older firmware version that works better? I'm currently running Windows 7 Ultimate 64-bit.
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Mar 21, 2011
My desktops _usually_ connect, and then the connection will drop/go slow(14400 slow)/give that little yelow triangle on top of the wifi icon.First i had an edimax wifi PCI, now i have a trendnet wifi PCI. They both do the same thing.If i connect my HTC hero and start internet sharing, it works very well, and is stable. My ethernet works fine as well. It is like my computer is immune to PCI cards?I have tried with different wifi APs now, but its still the same.I have a zyxel adsl modem, and a linksys wifi AP hooked up to that. I noticed, that when my desktop is connected, the zyxel will get some kind of overflow from the linksys. It says "client reached max number of sessions per host" It's like my desktop is killing the network. I have tried many things. Drivers, fail safe, registry cleaner(I know), killing all unnescessary program, switching the PCI ports, but none of it seems to work.
I had my laptop running connectify (access point app) and it actually worked fine, but today it won't connect to that either.I'm going to create another partition on my harddrive, and install fresh windows 7 on that, and see if it does the same. But even if it doesn't I _want_ to find out what is causing this instabillity.When i try running the network diagnostics, it says DNS error, or that the router is fail. But my laptop works fine.Also, when doing speed tests, my laptop gets normal speeds, and my desktop is VERY slow DL, but normal UL ?In speed tests my desktop is very slow, but stable, but during the test, my laptop will first go like 2 mb/s - 3mb/s DL and suddently BURST up to like 64 mb/s although i only have 10 mbit line? It's like its buffering or something. Very weird behaviour, but working fine.And no, i do not have torrent programs or whatever running.Some says that i shout try and change wifi channel and bands, and avoid "mixed" mode, but none of it works. Always the same problem.ATM. my computer can't connect to any wifi at all. It keeps having the yellow triangle.
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Feb 2, 2011
I have a Linksys WRT110 wireless router for my desktop via a D-link DWA-125 wireless adapter. The OS is Windows 7 64 bit and I mainly go online to play games. This has been a while and every time I play games, which requires stable connection, I will get this lag (the ping goes as high as 600ms for every few seconds then goes back to normal).I tried many ways to troubleshoot and find no solutions. I updated firmware for USB adapter, power cycling the router and reset the router many times.
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Dec 20, 2009
I bought the WMP600N because Linksys and Microsoft listed it as 'compatible' for Windows 7 x64. My experience:
- unstable and weak connection
- pings to websites like google.com drops, average: 1 out of 3
- low signal, on the same spot my three years old HP-laptop with 'a build in wireless card' has full signal strength in Windows 7
- it works well under Windows XP (32 bit)
I am convinced that drivers for the WMP600N are not ready for Window 7 x64. Linksys (or Ralink, which developed the chipset), release a proper driver for the WMP600N.
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Apr 3, 2013
Region : Netherlands
Model : TL-WDR4900
Hardware Version : V1
Firmware Version : 121211
ISP :
after changing from a Thomson router with wifi to the TP-link WDR-4900 I find that the wifi is very unstable. The 2.4GHz is operating on the same channel as my previous router (channel 8 - which is the lest busy channel around my house), and none of my neighbours have wifi on the 5GHz band. Almost all devices in my home regularly have to reconnect to the wifi, both on the 2.4GHz as on the 5GHz (tested with more than 8 devices). Almost every 15 minutes I see a "wifi channel disconnected" message, 10 seconds later followed by a "wifi connected" message. the Wifianalyser app on my tablet confirms that the wifi signal drops once in a while to zero. I use the latest stable frmware (I read that there is beta firmware but I don't like to loose warranty). The stability seems to unrelated to the amount of traffic on the wifi network.
Will this be fixed in the next firmware of the TP-WDR-4900 ?
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Feb 8, 2013
If I send video file(overall bit rate is 17.5Mbps) to client with 2.4Ghz band, it always freezes and go repeatedly around 1 second interval. the distance around 10m away without any wall, open space actually.
But same condition with above, cheaper wireless router no problem at all. It happens only with EA4500. And there are no any parameters setting menu actually.
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Jan 26, 2013
I have had my EA2700 for about 6 months now. Have had no problems until about a month ago. One night I could not get the router to connect to the internet. First thoughts were that the cable connection had gone down. When I finally started to trouble shoot I was able to confirm the cable connection is fine by connecting to the modem directly.
Out of the modem I am getting 14+ Mbps. (I only Pay for 10 So a plus there)
I could not get the router to connect to the internet. I ended up resetting the router and reconfiguring it. Ever since then I have been getting really unstable connection to the internet.
When I connect directly to the modem (cabled) I am getting a nice steady connection . When I add the router and hardware in I get a good connection only a Mbps or 2 drop off and a pretty steady connection. Then when I connect over WIFI I get a much larger drop off depending on if the device is a 2.4 or a 5
The connection is extremely unstable. The curve on the graph {URL} is very peaky and has extreme highs and lows. This is multiplied when running on the GHz (as my laptop runs on). My Iphone running on GHz. I can pull down 9 Mbps but the curve is still up and down. Iphone on GHz I barely get Mbps and it is extremely choppy on the graph.
I am able to back this up with my I PAD. I can only confirm the 2.4 number with the laptop as it does not have GHz radio in it. So every thing that us running on the 2.4 is getting poor connections.
I also suspect that the through put on the wired side is poor as well. I am unable to prove it as every test I run shows a good connection but netflix has been locking up and I have to restart what ever I am watching 2 to even 10 times a show. I need to do more testing to be sure the network or the devices are to blame.
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May 14, 2013
Just installed a refurb EA4500 this past weekend after testing it for a week. The regular wireless network is very stable, but not much faster than my single-band DLink DIR655. Guest network seems to drop out from two connected iPhones, and when the connection drops, you have to re-login and type in the guest password everytime. The linksys firmware is up-to-date( Linksys smart wifi)and so are the iOS on the 2 iPhones. Just to add, on my old DLink, the guest network comes up secured also, so when you type in the passcode, it remembers it next it comes in range unlike the Cisco, which requires login at a web interface.
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Oct 1, 2010
I have an NTFS formatted USB disk drive (Western Digital My Passport Essential Black 320 GB WDBAAA3200ABK) attached to the WRT160NL wireless router (Firmware Version 1.0.02), and I have video, picture and music files on the USB disk drive in three folders: Videos, Music, Pictures. Auto-scan is disabled, I scan the media files manually by clicking on the 'Scan All' button.
PROBLEM 1 The worst problem is that the router is very sensitive to files that can't be recognized by the router as media files. For example if there are subtitle files (*.str) between the media files, then strange and nondeterministic things happen: some valid media files are skipped and not included in the media database; some files included but the file names are mixed. The most irritating in the bug is that there is no log file, where you could find the problem, and so you never know which file cause the problem, and you have to browse through all the files hunting for the cause.
PROBLEM 2 When the router is in the process of scanning the media files, then the internet (WAN) connection often can't be used, although the router can be accessed and the status says it is connected to the internet.
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Aug 20, 2012
i have a little annoying problem with my E4200. V1 with the latest 04 fw. It seems, that after many hours of downloading at full speed (only one torrent at a time) the speed goes down, and up again, and becoming unstable. My max download speed is 1.5 Mb/s, and it can drop from that, to 50 kb/s, and then up again. and i have no internet access when that happens, but it only last 10-20 seconds and then its back again. Sometimes i get that yellow warning sign on the taskbar which says "No Internet Access" but not always.
Seems like its happening after many hours of downloading at full speed. im on the latest firmware, have tried different channels, 20 Mhz only on Channel Width, different names on the 2.4Ghz and 5Ghz channels.. i use the 2.4Ghz channel btw. Otherwise its stable, and i have had no problems while gaming online.
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Dec 1, 2011
I have a Motorola Surfboard cable modem with a Comcast account that is supposed to get "up to 15 mps". My desktop works gloriously, but my laptops and everything else hooked up to the net through my Media link Wireless N Router either run incredibly slow, or get kicked off completely.I've already had the router replaced one.
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Jun 15, 2012
The problem is that it always stays around 121-150mbps and sometimes 270mbps(beside router). here is my wireless settings on my router
router setting 1: [URL]
router setting 2: [URL]
network card setting:
802.11n channel width:auto
802.11n mode:Enabled
Ad-hoc channel:11
Fat channel intolerant:Disabled
Roaming aggressiveness :Medium
Throughput enhancement:Disabled
Transmit power:Highest
Wireless mode:802.11a/b/g
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Feb 16, 2013
Region : Hongkong
Model : TL-WDR4900
Hardware Version : V1
Firmware Version : 3.14.0 Build 130206 Rel.34701n
ISP : PCCW Netvigator
I have bought tp-link wdr-4900 for several days and encounter the following problems
1) nfs is not work, whenever I set up the nfs server (using hanewin nfs server), the media player fails to read the media file. (Problem does not appear for the previous ASUS n56u)
2) When there is large traffic rate (e.g. BitTorrent), the whole machine is very unstable, LAN and Wireless dies (SSID disappears, and LAN appears "ERR Connection" and "DNS not respond"), give me a feeling that the router cannot handle high traffic rate and the whole machine slows down and fails.
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Jan 14, 2013
Region : Iraq
Model : TL-WDR4300
Hardware Version : V1
have TL-WDR4300 router hardware v1 but when update to the latest firmware it became unstable and disconnecting so I had to return back to older firmware the new firm ware released 12/25/2012 and it is noted for TL-WDR4300(UN) V1 my model is TL-WDR4300 V1 not (UN) so what is different between the two
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Apr 26, 2013
Region : Hongkong
Model : TL-WDR4900
Hardware Version : V1
Firmware Version : 3.14.3 Build 130320 Rel.39025n
ISP : PCCW Netvigator
I have upgraded to the latest firmware which solved lots of problems regarding unstable wifi connection as well as BitTorrent / P2P transfers.But I also observed that when my BT is on (Transmission for Mac) at around 50KB/s upload and download, my network latency hikes up from some 30ms to 500ms which affects a lot on web browsing or other apps requiring Internet.My BitTorrent app is showing I am merely making some 20 peers connection so I am not convinced that is an ISP problem but it's more about the router.
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May 8, 2012
I have cisco 4402 Wireless LAN Controller with Cisco Access Point (AIR-LAP1252G-E-K9), everything is running smoothly.How come i use my Access Points without Wireless LAN Controller, is there any possibility then which AP model would be suitable?
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