Cisco Wireless :: WLC526 And Two AP521Clients Keep Losing Connectivity
Jun 24, 2012
I have a UC520 in a building with several IP phones. We installed a WLC526 and two AP521's for seamless roaming of cordless phones. THe phones work great with no issues. When I am running a ping test on a wireless laptop, i keep loosing packets. It looses connectivity randomnly. DHCP is given via Windows 2008R2 server. Have a cisco 2948 switch also in the mix. THe AP's are connected directly to teh front of the UC520. Why do phones work perfectly and not data?
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Jan 2, 2013
I just purchased an Apple TV 2 and am trying to use it with Airplay at my business. We have a WLC526 controller and three 521 access points.
We have a guest VLAN on our network which spans both the wired and wireless networks. The guest VLAN is VLAN # 100 and the numbering is 172.16.1.0/24. On this network, 172.16.1.1 is an interface on our ASA which clients on the guest VLAN use as a default gateway. On the wireless side, there is an SSID configured in the controller called LPGA-Guest which is bound to VLAN # 100. Clients that connect to this VLAN get addresses in 172.16.1.0/24 and can access the Internet through the ASA without any trouble. This has all been set up and working for quite some time.
What I have done is attached both the Apple TV and an iPhone 5 to the LPGA-Guest wireless network. I verified that they both have IP addresses in the same subnet, but when I try to bring up a list of airplay devices on the iPhone, nothing shows up. From what I gather, this is because multicast traffic is not being handled properly.
The following two threads have some info that I was looking at:
URL
URL
This is how I have the multicast options configured in my controller. I don't see an option to enable IGMP snooping.
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Mar 30, 2011
Noticed the last couple days that pages weren't loading on my laptop. Looked at the network status for the laptop and noticed that my network speeds would fluctuate from 54Mbps to 1Mbps, and various speeds in between. I had never had this happen before (I've had this router, a Linksys, for about 6 years). I thought maybe something was going on with the laptop. Grabbed my wife's laptop and she had the same issue. So, I checked the wired towers - their speeds are running at 100% all the time, no fluctuation. So, it has to be something with my router, but I'm not familiar with how to diagnose, etc. The router has a 3rd party firmware (DD-WRT) flashed on it, in case that matters. But I've had that on there about 4 years, nothing new. I've done a DHCP release and renew.
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Apr 4, 2011
I have a DIR-625 router that has been acting odd lately. Several times a day at random my devices (laptop, android phones, PS3) will lose internet connectivity from my wireless network. They say they are still connected to the network but I am unable to access the internet or even the router config page. Everything works fine on Wired LAN computers. The only way I can fix it is by unplugging the router for a few seconds. I have had the router for over a year now without this problem. Seems like it may have started when we got our android phones.
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Sep 7, 2011
our autonomous 1252APs. It loses network connectivity irregularly and ends up disconnecting everyone. It may stay up from a few days to a few weeks. I don't see any log messages that give any clues to why it is doing this. We have 30 of these working worldwide (on the same software level and same config) and this is the only one having the problem.
Things I have tried: Changing software levels - there is a code level where it didn't seem to have this issue, but I can't run it because then I'm unable to monitor it in our monitoring system. Swapping out wireless access pointsRe-terminating the cable on the AP side, it was really difficult to get the network cable into the AP while swapping it outBlocking a company test piece of equipment from connecting using the mac address filtering (it connects with one of their test IPs - weird) – I still see it connecting though I don't see high utilization on the switch port when the issue happens I had a few cases open with TAC, and they were unable to find anything wrong - gave them sh techs of prior to the event and after the event. It was one of those where the tickets were open for a weeks with no updates.
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Dec 3, 2012
We are implementing a WLC infrastructure in our company following the below scenario:
- WLC 5508, OS 7.2
- APs AIR-LAP1142N-T-K9
- 3 Wlans (1Open w/ Web Auth, 1 WPA2 and 1 802.1x)
Issues:Everything seems to be fine, but some users loses connectivity (when connected to 802.1x network) at least 3 times by day.
- I cannot see anything at WLC logs concerning the association/deassociation of any of these users.
- Only strange line in the logs is "RADIUS server 172.21.44.50:1646 deactivated in global list" (authorization server config)
- Also I see some "Coverage hole pre alarm for client" but that doesn't look like a problem...
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Aug 21, 2012
I have the model AE1200 usb adapter and its been working great for over 6 months, but lately it has been inconsistently working. It has stopped working then i have to reset the adapter and then it will work for a little bit and then it will do it again. is this a common problem or is it likely my adapter is failing? Is there an update that i am missing?
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May 18, 2011
I recently purchased a Belkin F5D8053 N Wireless USB Adapter after my 6 year old adapter was unable to see my home network in the network list.
I installed the software but the adapter wouldn't connect to my home network so I reinstalled and updated the driver, still wouldn't work. Finally about 2 hours later it just randomly connected. Now it has been frequently (1-2 times a day) losing connection to my home network for around 3 hours, it can see a dozen networks in the list with full signal strength but won't connect to any at all then connects to my home network again several hours later.
I have switched between the Windows connector and the Belkin one and tried all 6 USB slots with no luck. I contacted Belkin support and they told me to try the device on another computer and see if the problem still happens but I don't have another computer to test it with.
I suspect this is a problem with my Windows installation rather than the hardware or router as my old card would freeze once every couple of days and was only fixed by powering off my computer as Windows was unable to kill the process to restart it.
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Sep 7, 2010
Issue with Linksys E3000 router (firmware 1.0.02). I'm experiencing issues with the following wireless connections:
-iPhone 4G (wife's)
-iPod Touch 2G
-PC with wireless connection (non Linksys brand adapter)
-Acer NetBook (non Linksys brand adapter)
The issue is the connection gets interrupted and dropped, but the devices and the router DHCP clients table show the connections are still present. By interruption, I mean no data traffic is being transmitted.My wife's iPhone 4G and my son's iPod Touch wifi both show they are connected to the home network, complete with wifi bars being displayed, and the checkmark is present next to the home network connection in the the device settings for both. When I check the E3000 DHCP clients table, both Apple devices are listed as holding a connection. Yet both devices display network errors when trying to use any app that connects to the internet. By restarting the wifi connection on each, the connection is restored to the point where traffic now transmits. My wife and son estimate it is after about 10 minutes that they encounter the interruptions.
On the PC and NetBook, the connections have to be terminated and reconnected. I have not timed these to see how long before the connection becomes problematic.Interestingly, my ASUS laptop and my iPhone 4G do not have the issue, nor does my work laptop (Dell).There are no timeout parameters in the router config. Closest thing to it is the Beacon Interval, but I don't know which way to adjust it (up or down) to manage the devices that are experiencing interruptions. I have not made any interval adjustments...at this time, everything is set to default settings.This E3000 replaced an aging WRT54 (hardware v2) router so that I could have an N router in the house.
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Aug 29, 2012
ISP : ShawPC >> SMC Modem/Router >> Netgear Router >> PS3 and Denon Stereo Receiver ( Both hardwired to Netgear Router), 2 Laptops and 2 Phones connected wireless- The reason I do not use the SMC as a router is because I was getting terrible wireless signal- When everything is working properly I am getting great speedsroblem : I keep losing internet connectivity. On the wireless devices I still have have great signal strength but no connectivity. I need to run netgear genie oripconfig/release/renew to get it back. It always comes back but this is annoying.It also does this on the PS3 and Denon which are hardwired to the router..as with the other ones if I reset the router or do a connection test on the PS3 it will fix it. Finds IP but no internet connectivity.My PC has also started to lose connectivity and I need to do a ip release/renew and it comes back fine.The fact that this is happeneing on my PC would lead me to believe that it may be an issue with the Modem/router. Are there some settings I need to change on it since I am only using it for modem purposes? I have disabled the wireless on it but I don't think that would be the issue anyways
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Feb 17, 2012
I have a WLC526 running sw version 4.2.61.8 that I finally got around to installing in my shop for testing after sitting on the shelf for several years. Since it's now out of warranty and I'm no longer certified getting the latest sw version isn't possible so I'm stuck with the version it shipped with.
1, How do we change the web log in page from https to http? No guest wants to get confronted with a certificate error page so https doesn't make sense.
2, The virtual interface used for Web-Auth provides for a DNS Name but if I set a name it won't resolve and the log in fails. If I delete the name it uses the assigned IP instead and works fine. How do I get the DNS Name to work since it looks more professional?
3, When changes are made to the WLC I was initially just applying the change and then saving the config but it appears for some of these changes to take affect I have to reboot. It this correct or am I just missing something.
Again some of these issues are probably addressed in the subsequent sw releases but since my device sat in a box for 3+ years I missed out on the opportunity to upgrade and now TAC is telling me { (no contract || no warranty == no software) }, despite the fact that this device reached its EOL.
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Mar 23, 2012
I am having an intermittent problem with my network connection dropping out for no apparent reason.When it drops, I still see the lights blinking on the NIC card, but cannot pass packets even to the router.Windows does not report the connection or the cable as disconnected when this problem is occurring.The problem will persist until I disconnect and reconnect the CAT-5e wire, or disable and re-enable the NIC.As soon as I do one of those 2 things, connectivity immediately returns (and works for another hour or so).I am running a legitimate copy of Windows 7 Home Premium 64-bit on an HP Pavilion.All of the latest Windows updates and the latest firmware drivers are installed.My ethernet connection is a wired Local Area Connection with a static IP address, gateway and DNS.The IP address, gateway and DNS settings are accurate and work for several other computers here.[CODE]
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Sep 19, 2012
I have an issue with my current network where every couple of hours I will lose my connectivity and it will not come back unless I do a power cycle on my router/modem. I originally thought the issue was with my router, however I'm beginning to think it's an issue involving the modem. I've tried two different routers and this happens on both. My main router is a D-Link WBR-1310 (crap I know but it was free) and has lasted for years, and my modem is a Toshiba PCX2500 from Time Warner Cable. The second router I used to test this was an older Linksys BEFW11S4. I was going to replace my router, but when I saw that both of them reset after a few hours (today was only 5, last night it was connected for over 8 hours as I slept). I ran an IPCONFIG /ALL when I was connected with internet and when I was connected without and the only three changes were: [code]
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Mar 23, 2012
I am having an intermittent problem with my network connection dropping out for no apparent reason.When it drops, I still see the lights blinking on the NIC card, but cannot pass packets even to the router.Windows does not report the connection or the cable as disconnected when this problem is occurring.The problem will persist until I disconnect and reconnect the CAT-5e wire, or disable and re-enable the NIC.As soon as I do one of those 2 things, connectivity immediately returns (and works for another hour or so).I am running a legitimate copy of Windows 7 Home Premium 64-bit on an HP Pavilion.All of the latest Windows updates and the latest firmware drivers are installed.My ethernet connection is a wired Local Area Connection with a static IP address, gateway and DNS.The IP address, gateway and DNS settings are accurate and work for several other computers here.The Network Interface Card is a Realtek PCIe FE Family Controller (VEN_10EC / DEV_8136 / REV_05).NIC Power Management, Energy Efficient Ethernet, and Link Down Power Saving are all turned off.On the NIC, ARP/Large Send/IPv4,TCP,UDP Checksum/NS Offload, Flow Control, and are all on.
Receive Buffer Size on the NIC is 64Kb (512 buffers). Receive Side Scaling on. 128 Transmit Buffers.Interrupt Moderation is turned on. Magic Packet features are turned off. Optimal Performance enabled.NIC Speed and Duplex are set to 100mbps Full Duplex wherever possible (automatic was also tried).802.1X authentication (EAP or PEAP) is disabled. Auto connection logic is disabled.Connection routes through two switches into a Belkin router; other devices on same networks unaffected.Much of my data is stored on a Network Attached Storage device, with UNC shares mapped to drive letters.Other Windows, Mac and Linux devices connected to the same NAS device have no problems staying connected.When the issue occurs, I can't ping the gateway, do DNS lookups or pass any packets as far as I can tell.I have tried swapping out the CAT-5e cables for other cables and even ran them through a cable tester.
Network fixes I have attempted from the OS level so far include:
~ Switching the dynamic port range to start at 10,000 and run for approximately 54,000 ports
~ Systematically reviewing every running service to make certain that only the essential ones are on
~ Disabling all NIC stacks except Client for Microsoft Networks, IPv4, File and Printer Sharing and Comodo
~ Attempted connections with Comodo turned completely off and its NIC driver disabled
~ Attempted rolling back the RealTek driver to an earlier one from the same family and device line
Using netsh I have tried the following settings:
~ netsh winsock reset catalog
~ netsh int ipv4 reset reset.log
~ netsh int ipv6 reset reset.log
~ netsh int tcp set global rss=enabled
[code]....
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May 30, 2012
So my boyfriend and I just moved and, after struggling with our old wireless router we haven't used in years (pretty sure it was dead), we bought a whole new one in the hopes that starting from scratch would be simpler. It's a Netgear and we were aiming to hook up three devices through it; my laptop, his computer, and our Xbox 360.
He hooked it up no problem and we were using wifi for our computers and one ethernet cable through the router into the Xbox, peach as pie... Except my Toshiba laptop decided to rebel and allow me to use the internet for about five minutes before claiming there's "no internet." The signal says excellent and the little alert symbol keeps appearing and disappearing, but no pages will load. I tried running troubleshooting, but it couldn't identify the problem. Shutting down my laptop and turning it back on seems to be the only way to get it going again for another five minutes until the cycle continues.
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Jun 15, 2012
I've got a linksys router with two desktops running on it fulltime. One is hardwired (Win 7), the other is wireless (Vista). Normally, they have no problems with connecting. But I just got a laptop (Win 7) that is causing the whole network to go down for about 15-20 minutes then it will come back up for all my PCs but still drop out sporadically causing another 15-20 minute wait Both my desktops are unable to connect during this time. I also just got an old refurbished XP laptop from work, and it connects flawlessly. Then we had a friend come by and try to connect to our network and her laptop had the same problem.
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May 1, 2012
Im having problems with some toshiba laptops that arnt showing the SSID for some wireless points in the school. We have had the waps set up with the same ssid so we can walk around and the laptops will connect from one to the other. Its been like this for sometime however some new laptops we have got running windows 7 pro show some of the waps up as "other network" - File attached. The actual SSID on ALL waps is Peel Park WiFi Therefore it keeps losing connection to the wireless points and wont connect to some.
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Oct 8, 2011
I am running the below rig and connecting wirelessly via my DSL Router to my Blu-ray player which is connected via HDMI to my TV. Using Windows Media Center I have been recording shows via an OTA antenna. They are in .wtv format and going on the 500GB HDD. Playing these files on my TV has been going well until this week. During playback we frequently lose the connection. I have tried power cycling the router and the player, re-entering my settings in the player and connecting via Cat 6 cable. The only clues I have are that I recently did a second firmware update on my player (did not occur immediately after that) and I sometimes get the following message on the computer... Media Foundation Protected Pipeline EXE has stopped working.
[code]...
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Mar 5, 2011
It seems to happen only when connected through our rooms or through wireless. When I connect directly to the router I don't lose connection. The router is downstairs and it routes the wired connection through a switch. So when routing through the switch or using wireless the connection is lost and re-connects about every 30 seconds to 1 minute. When directly connected it works fine. I've reset the router and reset all settings twice and nothing. I'm using 10/100. Not sure if any of this matters. I have also updated the firmware to 1.35NA. PPPOE password and username are correct as they have been given by our ISP. Any settings I should be aware of? Everything is pretty much default. All I do is setup the internet connection and then setup a wireless connection. Are we overloading the system maybe? I've also changed the password a few times as well. Seems like the logs fill up really fast. Keep getting blocked UDP and TCP packets from different addresses.
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Jan 17, 2013
This problem only seems to affect one of our sites. Every once in a while, several APs would lose link to the 5508 and get stranded. The only way to fix the issue is either to power cycle, or better yet SSH into the APs and use the command "capwap ap controller ip address x.x.x.x", and then they'd automatically rejoin the controller. At first, I thought network hiccups caused the APs to lose connectivity, but there's none that I could find. I have the primary/secondary controller IPs configured in them as well. See log below:
[previous log entries show AP working as intended, then...]
*Jan 18 05:29:29.632: %CAPWAP-3-ERRORLOG: Retransmission count for packet exceeded max(CAPWAP_ECHO_REQUEST
., 1)
*Jan 18 05:29:29.632: %LWAPP-3-CLIENTEVENTLOG: Switching to Standalone mode
*Jan 18 05:29:29.645: %CAPWAP-3-ERRORLOG: GOING BACK TO DISCOVER MODE
*Jan 18 05:29:29.645: %DTLS-5-SEND_ALERT: Send FATAL : Close notify Alert to [ommitted due to security reason]:5246
*Jan 18 05:29:29.704: %WIDS-6-DISABLED: IDS Signature is removed and disabled.
[code]....
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Oct 23, 2011
I have a Cisco Aironet c where it is configured as an AP. I use a Pocket PC to access the AP, but after a period of use, the Pocket PC loses communication with the AP for a short period of time and the application that is utilized in the pocket closes. After a few seconds it automatically connects. Searching the logs of the AP found the following warning: "Packet to client 0017.2302.8a5e Reached max retries, removing the client", but this is not always alert appears.
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May 16, 2013
We had a system outage due to power problems a few days ago, and now our WLC is showing short term packet loss when monitoring it using SNMP. We also monitor it using ICMP, but that shows no packet loss. I looked at the interface statistics on the WLC and all of the switches in between and there are no errors to be seen. is there any way to troubleshoot this problem on the WLC? I am more familiar with IOS than the WLC CLI.
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Nov 5, 2012
I have a problem with myself a few other clients randomly disconnecting from my 871W. It appears that I am still associated but Windows 7 shows "Limited Access". I appear to be assosciated to the AP and I still have my ip address but I can't ping the 192.168.1.1 gateway (871W). I have also set my power plan to allow for Maximum Performance which I thought disabled PSP but the log is still showing errors.As a final note, after I reconnected by ip address (192.168.1.107) doesn't show up in "sh ip dhcp bindings" but I'm working.To correct the situation, I have to disconnect and the reconnect to the AP and then I am good for another day or close to it. Below are the log errors, config and a sh ver. [code]
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Apr 20, 2013
I have installed a wired and wireless connection for a compound which is around150 squire meters. I used the Cisco wap4410n routers for the wireless setup.
The structure is like this.There is a connection coming from the service provider. There is a central switch where the connection coming from service provider, the server, one Cisco wap4410n router and other two switches are directly connected to it. Again I connected other switches to the switches getting connection from the central switch. I used Cat 5e and Cat 6 cables to connect the switches as well as the wireless routers (For more info , the cable goes underground) and I used cross-over cable to connect switch to switch and straight-through to connect routers to switches. I connected the other Cisco wap4410n routers to the switches outside( I get like 6 Cisco wap4410n routers)The wireless routers are connected to the switches which are connected to the central switch and also on the other switches.
The routers are configured to have their default AP mode.My problem The connection is very slow. The connection is down almost every week and it needs to be re-configured. The connection nice on the router which is directly connected to the central switch(but not the same on the others routers which are connected to the other switches)even when I reset them they don't fall to .245 ( which is ok I can see them on the DHCP server but I still see it as problem)when I set them as a wireless wireless repeater, full signal but no connection(given that I have set same SSID, enabled allow wireless signal to be repeated, filling MAC addresses) Down here I have tried to show the architecture diagrammatically.
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Feb 2, 2011
I have configured Cisco 2801 with HWIC-3G-GSM to work as a GPRS router.
The configuration is:
chat-script gsm "" "atdt*99***1#" TIMEOUT 60 "CONNECT" chat-script pin "" "at+cpin=xxxx" interface Cellular0/1/0 ip address negotiated ip virtual-reassembly encapsulation ppp dialer in-band dialer pool-member 1 dialer-group 1 async
[Code].....
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Nov 28, 2010
I have two 1310 bridges...one set as root and the other as non-root.For some reason they keep losing connection. When I reboot the non-root bridge, link is established.Both bridges have an antenna connected with the right connector and they have the setting antenna transmit right antenna receive right
logs from root bridge
Nov 29 13:52:53.311: %DOT11-4-MAXRETRIES: Packet to client XXXX.XXXX.XXXX reached max retries, removing the clientNov 29 13:52:53.311: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station XXXX.XXXX.XXXX Reason: Previous authentication no longer validNov 29 13:52:53.568: %DOT11-6-ASSOC: Interface Dot11Radio0, Station Test XXX.XXXX.XXXX Reassociated KEY_MGMT[WPAv2 PSK]Nov 29 13:55:16.260: %DOT11-4-MAXRETRIES: Packet to client XXXX.XXXX.XXXX reached max retries, removing the clientNov 29 13:55:16.260: %DOT11-6-DISASSOC: Interface Dot11Radio0, Deauthenticating Station XXXX.XXXX.XXXX Reason: Previous authentication no longer validNov 29 13:55:16.550: %DOT11-4-MAXRETRIES: Packet to client XXXX.XXXX.XXXX reached max retries, removing the clientNov 29 13:55:16.550: Client XXXX.XXXX.XXXX failed: reached maximum retries
logs from non-root Nov 29 2010 13:52:55: %DOT11-4-UPLINK_DOWN: Interface Dot11Radio0, parent lost: Received deauthenticate (2) not validNov 29 2010 13:52:55: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to down The signal strength is around -84dBm Cisco IOS Software on both bridges is: C1310 Software (C1310-K9W7-M), Version 12.4(10b)JA1, RELEASE SOFTWARE (fc2)
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Sep 7, 2011
We've had this AP for just over a year and just recently it started dropping its wireless connection. To fix, I have to and unplug the power and then plug it back in.. Then it works again for a few hours and drops out again. If I navigate to the config page right after it drops, all of the settings seem to be completely gone. But if I go through and unplug/plug it in again, all of the settings are back.
I updated the firmware to 2.0.4.2, but that didn't seem to resolve the problem. Is this thing a brick now?
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Sep 12, 2011
linksys router problems Linksys wireless router connected to cable modem. over time router looses connection to internet. rebooting router reestablishes connection. running XP sp3 from laptop connected wirelessly?
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Nov 5, 2011
I recently bought a iMac and it has been fine apart from the wi-fi connection.It used to disconnect me for 2-4 minutes every now and then at first and then this died down, but recently it keeps losing connection altogether. When I go on run diagnostics it says that i have failed to connect to the ISP and internet.Is there anyway to fix this?,I use a Netgear router with an Apple iMac running with OS X Lion
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Feb 9, 2011
i keep playing mw2 and when i go in to my screen it says that my signal goes green and then red like it jumps can you tell me what to do my intenet signal on my ps3 is 100% its just when i play this game
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Aug 3, 2011
I have an Acer Aspire 5715 running Vista..the wireless was acting up so I purchased a new Atheros wireless adapter. It runs fine for a while then loses signal then pops back up. I have reformatted the laptop, checked all the appropriate areas (so that it does not turn off to save power) downloaded the latest drivers,and reset my router to factory settings.
[code]...
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Jun 13, 2011
my Intel wireless card keeps losing the connection. Until a couple of weeks ago it would be fine for roughly the first 20 minutes then the connection would just completely drop out and the only way to get it back again is to go into the network and sharing centre, disable the network card and then reenable it. Most of the time this works, but again for only the first 20-30 minutes, then I have to do it again. Occasionally it works for for longer but that's a rare occasion.Now not only does it do this, but also, if I put my laptop into sleep, sometimes when I turn it back on again the card will not connect to the network and I have to do the same disable and enable process.[ODE]
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Jan 25, 2012
When using my pc through my wireless Netgear router, the connection is lost periodically and I get the message "default gateway not accessible". It only happens on my PC, and not on my IPad. What should I do to keep the connection on my PC?
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