Cisco Wireless :: WLC 5508 Clients Disconnect / Not Able To Reconnect
Jan 22, 2013
I have a WLC 5508 in my datacenter, and 1142s configured with FlexConnect at a remote site.Two issues:Some APs 'die' from time to time where I cannot ping them anymore and they do not service any clients. I can reset them from the WLC after which they work again. I have some clients in the building (same area) who lose connectivity from time to time and are unable to reconnect to the wireless. I am seeing errors that the gateway cannot be found or there is not a valid IP. restarting the AP closest to the clients fixes the issue. I have replaced the AP and connected to a different port on the switch.
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Jan 8, 2011
My Internet will disconnect & then reconnect constantly. I have 2 laptops & they are both on my home network & I have no trouble with the other one so I assume there is nothing wrong with both the Internet service & router. The laptop with the problem is an acer/aspire 5720z. The Wireless Network Adapter is a Atheros AR5007EG. When I go to the Adapter Properties the status reads "The device is working properly". When I go to Control Panel>Network & Sharing Center my Wireless Network Connection Signal Strength reads Excellent. The operating system is Windows Vista Home Premium.
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Apr 29, 2012
The wrt400n works fine. Except randomly every day or every other day, laptops cannot connect to the router. Router lights are still on, blinking, etc, no change there. Releasing/renewing IP doesn't work. Turning off wireless radio on laptop and back on doesn't work.Unplugging and replugging in the router DOES work, and laptops can connect to the router again.Router is updated to 1.0.02 firmware, sine I thought that was the problem, but after firmware update, problem is still occurring.Wireless is set to mixed,channel width is auto?
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May 15, 2011
When doing anything on my PC, gaming, browsing, whatever, I will have random disconnects for a few seconds and it will reconnect. I don't get the "your network cable has been unplugged" message, it just stops working for a second or two and starts working again. This has been happening for a few months after a fresh install of windows xp and I haven't really tried to fix it.Every other computer in the house is fine except this one, it can't be the modem because a new one was installed a few days ago and its the same problem. The router was reset within the last week as well. I think the problem is with this computer alone but I don't know where to look. The problem didn't happen for a few days after I put a new network card in, but soon after it continued happening. I also have tried a few different CAT5 cables, even the XBOX one but nothing resolved the issue.
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Oct 10, 2011
I have and D-Link modem which is bridged and a PPPoAPPPoE profile set up on the RV220W for my ADSL2+ connection.I cannot for the life of me find anywhere in the routers config web pages to tell the modem to disconnect or reconnect the connetion to the ISP.The reason I want this is because I need to make sure the correct signaling is sent before the connection is stopped so that the exchange doesnt see this as a drop out and reduce our line speed to compensate.
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Dec 6, 2011
The environment: 20 X air-ap1141N-A-K9 (these are standalone) in three different buildings with either 1 or 2 units per floor depending on sq. footage. IOS is c1140-k9w7-tar.124-25d.JA1.
Problem Users running various tpyes of wireless cards on windows XP SP3 get disconnected periodically throughout the day whether they roam or not. This disconnect problem started happening after we replaced older 1200 series units running wpa and tkip and replaced with 1141n running wpa2 with aes. Users running windows 7 do not get disconnected. However there are very few W7 users on campus as this point in time.
I set up a single test unit shown below and associated two laptops to see if they would disconnect. Not once did I lose connectivity. NAME: "AP1210", DESCR: "Cisco Aironet 1200 Series Access Point"PID: AIR-AP1252G-A-K9 , VID: V03, SN: FTX1339903J NAME: "Dot11Radio0", DESCR: "802.11N 2.4Ghz Radio"PID: AIR-RM1252G-A-K9 , VID: V01, SN: FOC1337107F IOS: c1250-k9w7-tar.124-10b.JDA3
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Apr 4, 2011
We have a setup where clients on the internal network send/receive their emails through Microsoft Outlook client, while the Exchange server is hosted on the internet, outside the organization.The clients are connected to a Cisco switch, behind an ASA5510 Firewall. The Firewall is connected to an internet router, with double NAT (On the ASA and Router).
the outlook clients disconnect from the Exchange server, sometimes for hours, and then reconnect again. During these disconnections, the same client PCs are able to browse the internet normally. There are no restrictions for the traffic going from the inside to the outside. During the disconnections, if we try to connect using a public IP bypassing the ASA & router,.
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Nov 23, 2011
I have configured 5508 with multiple APs but clients on the internal SSID aren't getting an IP address. I have the IP helper address configured and I have also disabled DHCP proxy on the controller.
I get the following from the client debug, I don't know what the below mac address is, it's not one my APs or the clients, I am not seeing this mac address on the controller at all but it shows up in the debug.
type = Airespace AP - Learn IP address
on AP 6c:9c:ed:87:23:c0
*Dot1x_NW_MsgTask_0: Nov 25 16:14:17.579: 08:11:96:20:94:28 Entering Backend
[Code].....
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Jan 22, 2012
I'm having a problem with my clients dropping the network connection constantly throughout the campus. I am using a Cisco 5508 controller and the APs are LAP1141N. At first I thought it was a roaming issue but I tested with only 1 AP and the problem persisted, I can tell you that we don't have interference problems and that our old linksys APs used to work without flaws.
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May 1, 2013
I have a 5508 WLC with CAP3502i APs connected to it. I upgreaded the code to the newest 7.2.115.1 code. I am having trouble with laptops that are not physically moving but are moving their connection from AP to AP in the same area. This is in a school and causing a problem with a testing program they are using becuse they drop 2 or 3 pings in the process. I do have the area heavily saturated with AP but that is because of the amount of clients we have connecting to them. There is 8 classrooms in a hallway with 24 laptops in each classroom. Each classroom has an 3502i ap in it. The laptop can be connected to an AP with great signal and move to another AP that still has a good signal but not as great. I don't understand why if I get 4 bars and connected at 144mps it would move to a new AP. These are Lenovo laptos and i have updated their wireless card drivers and set the roaming agressiviness to low but it still happens.
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Nov 8, 2012
I have a WLC 5508 with half a dozen LAPs (AIR-CAP3502I-E-K9).They have been working but sometimes clients detect conectivity problems with the wlan.Here is the message log I can obtain from the controller:
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Apr 14, 2013
We have deployed a WLC 5508 w/ SW version 6.0.199.4, 1142 AP's & open authentication w/ MAC filtering. Clients are randomly getting dropped with "Limited Access" shown in Win 7. In this state, the client machine is unable to ping the gateway and sometimes lose their DHCP assigned IP as well. A manual disconnect/re-connect to the SSID is required everytime.I ran a debug on one the clients stuck in the "Limited Access" state (debug client xx:xx:xx:xx):
*Apr 15 16:59:23.205: e0:91:53:60:1f:e4 Adding mobile on LWAPP AP 3c:ce:73:c5:1e:b0(0)
*Apr 15 16:59:23.205: e0:91:53:60:1f:e4 Scheduling deletion of Mobile Station: (callerId: 23) in 5 seconds
*Apr 15 16:59:23.205: e0:91:53:60:1f:e4 apfProcessProbeReq (apf_80211.c:4722) Changing state for mobile e0:91:53:60:1f:e4 on AP 3c:ce:73:c5:1e:b0 from Idle to Probe
[code]....
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May 16, 2012
We got a question about our WLC 5508 single controller deployment with 14 access points without a VLAN configuration.
When our clients connect to the wifi, we cannot see any ip address of them in the client details page. It shows everytime the ip address 0.0.0.0. The clients are configured with a static ip.
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Aug 6, 2012
question in regards to the deployment of a new WLC and new LAPs,I have configured and connected a 5508 WLC and 3500 series LAP.LAG is enabled in the WLC and successfully connected to the neighboring switch (using etherchannel) and to the network.
The port-channel port is set to trunk mode obviously and certain vlan ids are currently allowed (3-5)
The management interface has this IP address 192.168.5.250/24
I created a WLAN with WLAN ID 3, Interface set to Management and say SSID test1
I have connected a new LAP to the network, which switchport interface is set to access mode and assigned with vlan id 3. The LAP is able to join the WLC successfully with an IP address, such as, 192.168.3.100 (assigned via DHCP).
When I try connecting a mobile client to the wireless LAN, it can successfully detect and connect to the WLAN, created in the WLC (test1) however it gets an IP address by DHCP, in the 192.168.5.0/24 network, which is the IP range of the management interface's IP address.
What can I do to get the clients connecting on network 192.168.3.0/24? I thought this would be the case since I allocated the WLAN Id of 3 in the WLAN test1 configuration and since the LAP switchport is set to access mode with vlan ID 3.
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Apr 16, 2013
We have a Cisco 5508 controller with 1142 LWAP's running version 7.4.100.We have several Dell laptops which will not associate to the access point UNLESS you stand directly underneath it, power off the wireless, turn it back on then eventually the PC will associate to the AP.Once the PC is associated to the AP and user is authenticated then all is well.
Have tried updating the wireless drivers downloaded from both Dell or INTEL. This does not happen to all of our laptops. However, without making any changes to the WLC or the PC's, we have begun to expirence this problem with laptop which previously did not have this issue.
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Mar 18, 2013
For WLC 5508 software version 7.0.235.0, which command is needed to get the WLC send syslog messages everytime a wireless client associate and desassociate?
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Aug 26, 2012
I'm working on migrating autonomous WAPs to lightweight mode in a WLC 5508. Some of the older WAPs are being decommissioned at the same time.
One issue I have found is that after replacing an old WAP in autonomous mode with a new WAP (3502); some clients near the coverage of this new LWAPP are now connecting to another WAP in autonomous mode that has not been converted or replaced yet; but that is located quite far away from where these clients are, actually two floors down. Users on these clients have reported wifi dropouts, which is obvious due to the distance where the old WAP is. A workaround that seems to work is removing the wifi profiles in the client machines and recreating them again, which is not a good solution for all of the wifi profiles we have in place. At this point of time we still need to have the older WAPs until they are all replaced.
How can I get clients connecting to a LWAPP that is closer to their location? I'm wondering what causes those clients to look for an existing older WAP rather than connecting to the new LWAPP, which is broadcasting the same SSID closer to where they aree. Bear in mind that the new LWAPP is working fine and has live sessions working just fine.
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Jan 15, 2013
Just inserted a new 5508 WLC into the network. We current have 3 4404 WLCs, and there was a need to duplicate, as much as possible, the configurations on the 4404s, and the design. The 5508 came online as expected. We moved a few access points over to it. The APs got the correct address range. The clients are expected to get addresses in the same scope range as the APs. However, the clients are receiving addresses in the management IP scope.I know there are two "not a good way to do it" in here. Why is the management address range in the DHCP scope, and why are the clients using the same scope as the APs. We are going to change that. For now, the AP and client in the same range has been going on since we rolled out wireless in 2006.The 8 ports on the 5508 are configured for LAG. There is no dedicated port for management. They tell me not to do that on a 5508.
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Jun 12, 2012
I have a 5508 WLC and 40+ LAP1142N APs spread across 19 locations that allows staff to connect to our private network via wireless. I recently deployed about 40 new laptops all identical make and model HP ProBook 4530's and all have the same client setup for the wireless. Out of those 40 laptops I have 4 that will not connect to the private network. However, these same laptops will connect to my public, open wireless network without issue. In addition to the 4 that will not connect all the others will prompt twice for network authentication.Now, I have about 10 other laptops that are not the HP model and all connect without issue and without dual propt. I don't think this is a wireless network issue but could be some type of issue with this model of laptop.
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Jul 10, 2011
which is the maximum number of simultaneous wired guest clients on a 5508? And in a 2112 controller?
Wired clients count as wireless clients??
What about anchoring limitations, what is the effect of wired guest clients on the anchor controller?
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Jun 22, 2011
We have 2 WLCs, 4402 (main) and 5508 (backup). While we turn on both devices, 4402 have 10 APs, and 5508 have 10 APs as well. Total connected clients will be 120+, but when we turn off either 1 wlc, let's say only 4402 is power on, total 20 APs joined, but the total client will be 90+, never reach over 100 clients. The same happened on 5508, is there any maximum associated connection on WLC?
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Nov 17, 2011
Need implementation of an OID to view the number of connected clients per Access-Point? I am using a 5508 WLC.
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Feb 14, 2011
I have a network setup as live-ssid. It is using the Interface for VLAN 14. All APs under the default-group AP Group obviously allows clients to DHCP an address from VLAN 14. This is working fine.
I created a new AP Group called 3rd Floor. This has the live-ssid setup, but instead of using the Interface for VLAN 14 it is setup for the Interface for VLAN 50. I have all the APs on this floor moved to the 3rd Floor AP Group.
The problem is that 95% of the clients on 3rd Floor are still picking up DHCP addresses from VLAN 14. I checked and all the clients are connected to the APs on the 3rd Floor. Only 4 Clients are getting an address from VLAN 50.
I'm not sure if something is configured wrong or not since some devices pick up the new VLAN and the rest don't. I've manually reboot the APs on the 3rd floor to see if that would fix it.
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Mar 29, 2012
I would like to share one problem with WLC 5508 . we added a new virtual interface on the WLC. One new SSID is associated with this interface.
We created a ACL for this interface to restrict the access via WIFI to certian services. It´s not correct that everything works fine because the change were not applied. [code]
The changes of the ACL are applied on the fly, but for reason we don´t know, the clients don´t get a DHCP IP-Address (after changing the ACL) until the Controller is rebooted.
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Feb 21, 2012
I work on a college campus that has thousands of students a day accessing our wireless network. We have broadcast SSID that the students use to connect to the internet. The students usually have more than one WiFi enable device on them and their laptops and phones both take an IP address, but they are only using the laptop to authenticate while the phone is associted, but not authenticated. In the meantime, I have several thousand IPs being used by their phones/iPods etc. Is there a way to revoke the DHCP lease if the client does not authenticate within a specified time frame (i.e. 10 minutes)?
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Jan 22, 2013
I have a strange behavior between a WLC 5508 (version 7.0.116.0) and NEXUS7010.
WLC
The WLC is configured in DHCP Bridging Mode (it sends DHCP requests without change)
Nexus
The VLAN interface is configured as follows
interface Vlan501
ip access-group acl-int-vlan501-in-1 in
no ip redirects
ip address 10.12.56.4/21
ip ospf network broadcast
ip router ospf 100 area 10.23.0.0
hsrp 51
Clients can not obtain an IP address intermittently. If I deactivates the ACL when the problem appears(when the client can not obtain an IP@) the probleme is resolved
Note: Before the WLC was connected to Catalyst 6500 and worked properly for 2 years (with same configuration)
I saw this note about differences between DHCP relay on the NEXUS7000/NXOS an Ip helper one the 6500/IOS URL. Do you think the problem may come from the DHCP relay or ACL on the NEXUS.
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Mar 26, 2013
We are deploying BYOD with Cisco ISE 1.1.2 and WLC (5508) using 802.1x authentication.Windows clients cannot connect to 802.1x SSID with the following error on ISE:Authentication failed : 12321 PEAP failed SSL/TLS handshake because the client rejected the ISE local-certificate
The client doesn't have preconfigured wifi profile or root certificate installed.The concept of BYOD suppose that you can connect your device without any installed certificates and preconfigured wifi-profiles.
The problem is that Windows 7 supplicant does not send TLS alert in pop up window, when connecting to 802.1x SSID.If this alert is seen, than you can accept it and proceed the connection. After that you will be asked to install ROOT-cert, get your own cert and etc.So, the question is: how to make the windows supplicant to show the pop-up window with TLS alert?
p.s. the attached file shows the example of pop up TLS-alert window
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Feb 1, 2011
I have 4 desktops cat5 to Dlink DIR 615 router. All work fine. Any wireless clients, laptop or netbooks, see the desktop computers for a while then disconnect somehow. All machines can see the Internet through the router at all times. The desktops disappear from the laptop/netbooks but the wireless machines can be seen from the desktop computers but clicking on them gets 'Access Denied' message after a wait.3 desktops = XP, 1 98SE. All laptop/netbooks = XP
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Jun 28, 2011
I used to have ATT DSL but we recently switched to U-Verse. I have a Trendnet TEW-452BRP 54g wireless router than was handling the PPPoE function. It was set to work flawlessly with my wireless cards. No dropped connections, speed or security issues. It always connected quickly from wake up and on start up. Now we have a 2Wire i38HG wireless router/gateway and it's been difficult to properly set my network up as before. I use the Trendnet behind the 2Wire as my wireless router. Took me a while to figure out what to do, but DHCP is disabled on Trendnet so 2Wire does what it needs to. This option works fine for me. The only problem is that at first my wireless card would not automatically connect to the network through the Trendnet when it is in range like I had it set to do previously. When I would force it to, after 3 times it would magically connect on it's own. I made some changes in the Trendnet (Mainly disabling dynamic DNS and NAT) and that seems to have made a difference. To be honest, I don't know if that is significant or not or if it actually made a longterm difference but it seems like it has. So my problem is now that when I put my laptop to sleep and have it wake up, it does not automatically reconnect. It takes about 2 minutes then it does on its own. I read the event viewer and this is the info it gave me - Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 0x0018DE0682D8. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.
Level - Warning
OpCode - IpLeaseRenewalFailed
Source - Dhcp-Client
Then after 2 minutes -
Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0x0018DE0682D8. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.
Level - Error
OpCode - IpAddressNotAssigned
Source - Dhcp-Client
After this, it connects by itself. I don't believe I have configured the 2Wire or Trendnet properly, so I need some guidance and suggestions on this matter.
Laptop - Intel Core Duo 1.66ghz, 2gb Ram, Win7 Professional with SP1, Intel PRO Wireless 3945ABG
2Wire - 192.168.1.254
Trendnet - 192.168.1.1
- I did not change the IP of the Trendnet and I am not sure if I have to.
From the 2wire - Private Network
Router/Gateway Address192.168.1.254
Subnet Mask255.255.255.0
Private Network DHCP Info
Range192.168.1.64 � 192.168.1.253
[code]....
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Dec 23, 2011
I accidently disconnected my wireless adapter, how do i reconnect.
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Jun 24, 2012
My sony blue ray player lost it's connection to my wireless lnyskis router. I can't reconnect it.
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Apr 26, 2010
We have a WAP4410N wireless ap configured for WPA2-Enterprise. Initially everything works. Issue the user the proper certificate and they sign on correctly but once they disconnect and try to reconnect later it get stuck on "Validating Identity". The request never get to RADIUS server (no success/failure log entry, no radius traffic). Once I reboot the access point everyone can connect again but as soon as they disconnect the problem happen again.We testing other security settings (WPA-ENT, RADIUS(!), WPA2-Personal etc) and no problems. With older firmware have the same issue.Operating system: XP SP3, RADIUS server: IAS. Firmware: 2.0.1.0
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Jan 29, 2011
I purchased the Netgear a couple of years ago and it worked great. Since I've upgraded to a faster bandwith from Verizon, I can't get the Netgear to work. What am I not doing?
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