Cisco Wireless :: WLC 4402 - Lost Networks / Clients Not Getting IPs
Nov 1, 2011
I have 2 4402 WLC's and a central office and was trying to configure an H-Reap Ap but now the entire wireless network is down. Clients arent getting IP's. I cant see anything that is wrong but things are not working like they should.
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Nov 4, 2012
I have a 4402 which is connected to a 4506 Switch int Gig 3/1 via a trunk port. The Managment and AP-manger interfaces are on vlan 6 [code] I have a 1142N AP also connected to the switch and it pulls a DHCP IP Address and configs etc and registers to the WLC. It too is on Vlan 6 and it is connected to the 4506 on int gig 4/33 which is an access port. [code] I am doing local authentication, so i have added users to the WLC.. My problem is that the first client that connected was able to get an IP address and connect to anything internal and external.I then connected another client on another laptop and that client could connect but not get an IP address, it just self assigned.When i look at the clients i can see the MAC address of both Clients on the WLC, but doing a show mac address-table dynamic i only see the MAC of the client that works properly. The client that doesnt get an IP has no entry in the 4506 switch.I am stumped, from what I understand, is that the 2nd clients traffic is being trunked to the WLC , hence it has the MAC address. But I dont know why its not getting a DHCP assigned IP address.
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Jan 16, 2013
I have a 4402 (version 7.0.235) working with 10 units of 1121 APs connected to it. The WLC is not configured to work in LAG mode. Physical portt #1 is connected to the Main Switch (trunk). I have 3 WLAN mapped to 3 Different VLAN and Everything (security and internal, external DHCP) is working swell...Now- I have connected Physical port #2 directly to an ADSL Router (giga port), Configured Port 2 as untaggedwith the proper IP details.I have configured this interface to receive DHCP from the ADSL Router and for some reason, Clients are not getting addresses.When I assign a Static address to my laptop I get internet access and all is nice. I tried configuring The WLC internal DHCP server (instead of the ADSL router) and that didn't work. It seems like a DHCP problem but I dont understand the source of the problem of think of the solution.When turning off the proxy settings I noticed that it worked. Is there anything to do with that? The problem was that after a while the other WLANs starting causing DHCP issues as well.
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Jun 18, 2011
We have a controlled setup comprising of a 4402 WLC in our Data Centre and 1242AG LWAPs in our branches.The Wireless works well with a mixture of locally switched (h-reap) and centrally switched WLANs.I have a problem where Android devices don't seem to function as they should.I have been using an Android phone (HTC Desire, currently running 2.3.4 OS, but has been a persistant issue since 2.1) and it connects to my home wireless (and others) fine, but when connecting to the Wireless LAN at the office, it connects fine and gets assigned an IP address, but NO data flows. None, like there is no connection at all. I have just been using it on 3G. I figured it might have just been an issue with the hardware, so didn't bother too much.I have just purchase a new tablet (ASUS Transformer, Currently running 3.1 OS) and this does the same thing.I have tried publishing a new WLAN and have tried all types of encryption and authentication al the way down to open and still, no data flow. I have tried statically setting the IP details and still nothing.Interestingly, When I attended the last Cisco Live conference in Melbourne this year, I had my phone and it displayed the same behaviour on the Cisco supplied wireless, BUT, there was a second IPv6 enabled, when connected to that everything worked fine.
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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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Sep 29, 2011
When on the management interface the clients can't get dhcp but the AP's can on the same vlan. I've tried enabling and disabling dhcp proxy, and using a remote dhcp server as well as the internal server. This same config works on the 4402 we're replacing with version 5.2.193 on it.
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Oct 16, 2011
I am using wireless system with certificate athentication ( CA Server ) and RADIUS server.
I want to know if certificate is not installed and configured in wireless client laptop.
Do client get athenticate in wireless system and get access of wireless network ?
Also want to know any configuration required in WLC CISCO 4402 for authentication with CA server of client laptop.
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Jan 14, 2013
Recently (within the past 2 months) I've been having some issues with my 4402 wLAN controller.
The issue is thus:
1) New wireless clients (those without exsisting DHCP leases) are unable to properly connect to our wireless network.
2) Those same systems (and other systems) have no issue getting online via a wired connection (where available).
3) Devices like iPad, tablets, laptops partially connect but do not get a valid IP address.
Our config:
1) DHCP is handled by a seperate server (NOT the 4402 - it's DHCP setting is disabled)
2) Our wLan is not on a seperate network than our wired LAN
3) Wireless devices attempting to connect include iPads and laptops mostly.
4) We're a school with about 300 systems (primarily Windows XP machines).
5) 25 access points controlled by the 4402 (our only wLAN controller)
Important Notes:
1) No configuration changes have been made to DHCP or the 4402 device in a couple years.
2) 4402 Software Version = 4.0.217.0
The problem first showed up a bit over a month ago. I first thought the issue was DHCP server related , so I started there and didn't find any obvious issues. I did restart the DHCP server (which at that point had an uptime of somewhere over 700 days).
I then also checked the web interface of the 4402 to see what it was reporting. I noticed a somthing:A) As shown in the "WLAN_Issue_EDIT.png" the client count on the controller is showing 628 current clients. We don't have many devices in our entire campus.
I rebooted the controller after hours and that seemed to allievete the issue. Since then, the current client count hasn't ever gone above 60.
Now today I'm having the same issue regarding new clients getting IP addresses. The client count isn't real high on the WLAN controller and I don't see any other obvious issues. I'm torn between this being a DHCP issue or the controller issue (or a combination of the two).
The reason I don't think it's directly DHCP related is that all wired clients seem to be getting address fine.Plus, I've set my tablet device to a static address and it still cannot connect via wifi.
**Update** I've now rebooted the controller and the problem persists (at least on the nearby iPad - Will confirm other devices shortly).
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Jan 29, 2012
How do i find my networks password that I have lost. When I try to sign in on my Iphone it ask for a password that I don't remember. I am using a apple wireless computer. I had this password put on there so no one could break into my system but now I can't get in with my i phone or if i have visters they can't use their computer because I don't remember password.
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Oct 24, 2012
I have an ASA 5520 8.2(3) and allowing my remote client-to-site-vpn clients to access resources directly connected to my ASA on separate lower security interfaces (not the outside) besides just clients on my internal networks. Someone mentioned to me configuring 'VPN on a stick' however from what I've read this seems to be only applicable when it comes to split-tunneling back out the outside interface (could be off on that). Is this possible on other lower security interfaces as well, and if so what would a mock config that accomplishes that look like (acl's, nat, etc)? Also, if I want internal users to be able to connect to these remote clients once they are active, are there any nat statements necessary (such as nonatting them) or are the vpn clients just seen as internal clients from the rest of the internal network's standpoint by default?
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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 18, 2012
I have a ASA5505 and it has a vpn set up. The VPN user connects using the Cisco VPN client. They can connect fine (the get an ip address from the ASA), but they can't ping the asa or any clients on the network. Here is the running config:
Result of the command: "show running-config"
: Saved
:
ASA Version 7.2(4)
!
hostname ASA
domain-name default.domain.invalid
[code].....
what I need to add to get the vpn client to be able to ping the router and clients?
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Nov 5, 2012
We currently have an ASA 5520 communicating with 10 ASA 5510's, all on static outside addresses. I was asked to add 5 additional 5510's on dynamic address. All worked well in testing until it was decided that some of the dynamic clients needed to talk to each other.
My testing shows packets just dying in the 5520.
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Jul 6, 2012
I have a Netgear WNDR4500 running the stock firmware, acting as a router for my home. I also have 2 routers that are flashed with DD-WRT (Linksys WRT54G and Asus WL-520GU) running as client bridges. The Netgear is 192.168.1.1 and the other 2 client bridges are 192.168.1.2 and 192.168.10.3. The Netgear router is performing DHCP giving addresses from 192.168.10.100 to 192.168.10.254. I have numerous machines connected to the Netgear, wirelessly and wired, and numerous machines wired to each client bridge. All machines have IP addresses that are 192.168.10.100, 192.168.10.101, 192.168.10.102, etc... Everything is working fine, but I have one question: When I access the Netgear router, it shows the client bridges as clients, machines that are wired and wireless to the Netgear router are listed as clients, but the client list does not show any clients that are connected to the client bridges. I assumed that since the router is performing DHCP that all clients would show up.
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Nov 20, 2011
I have 2 4402 WLC's and am in the process of deploying 1042 APs out to sites. But The AP's wont recognize the WLC. I have configured the DNS for CAPWAP but still no dice. I have had to serial into each unit and give it a static IP and then I can see it on the WLC. Shoulsnt this be automatic?
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Jul 29, 2010
Any explanation about this warning from the WLC4402 after the software upgrade to 7.0.96. version? this is the message: Warning: WLC has detected its IP add xx.xx.xx.xx being used by a machine with MAC add xx:xx:xx:xx.and the MAC add found is the the mac add of the dynamic interface of the WLC.
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Jun 29, 2011
My WLC running 6.0.182.0 suddenly could not accept more than 47 APs! Ihave a 1240 trying to join but failed with no obvious reason (no special errors in debugging).
I unplugged one of the joined and the first one joined!! I replugged the second one but could not join!! I unplugged the first one and replugged the second one: the second joined the controller but the first could not associate again!
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Jun 25, 2012
Can 3600 series model AP work with WLC 4402 with existing license, we purchased 25 LIC pack and still using only 15. Any recommended Part no on 3600 series with external Antenna
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Jun 7, 2012
We have two cisco 1262 AP and a 4402 WLC, the AP cannot join the WLC. The AP gets the address from dchp
I cannot ping the AP address from the WLC, but i can ping the default gateway and other VLAN addresses.
I already read the info on the this link : [URL] Still our AP cannot join the WLC no matter what i have tried.
Setup
- VLAN setup on a Cisco 3560 48 port poe Switch
- tunk configured btwn the Gi Interface and the Management physical port
- WLC mode is configured for Layer 3
- AP Manager and Management are in the same Subnet
- Option 43 is configured for the with the AP Manager's IP address
- Opotion 60 is also configured with AP Manager's IP address
- the port connected to the APs are in the AP Manager VLAN
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Jun 13, 2012
Error: AAA Authentication Failure for UserName:radiususername User Type: WLAN USER
I am using a window radius server. I have added my WLC 4402 as a radius client on my radius server.
I followed the instructions on the MS link : [URL]
I want to use my windows raduis authentication for WLC management login and Web-Auth for guest WLAN user login.
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Feb 3, 2013
Our company has a customer with a Cisco 4402 WLC and a code version of 4.2.130.0 . The customer wants to upgrade the code to 7.0.230.0. Is there any flash size requirement when upgrading to 7.0.230.0? (upgrade train: 4.2.130.0 ----> 4.2.209.0 ----> 7.0.230.0), How can I find the flash size?
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Feb 3, 2013
We got WLC 4402 running software 7.0.235 and would like to backup the configuration and restore on 5508. Is this doable? Do we need to be on the same version as WLC 4402. How to get cisco document to follow the steps if the above is doable,5508 is new with no setup.
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Jan 16, 2012
I need to install one 5508 and a 4402 together to bring redundancy to a wireless environment.Can I do this?. What are the neccesary steps to perform this?, the idea behind this is to bring redundancy is the primary WLC falls for any reason.
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Mar 7, 2011
I have two wlc 4402 to control 50 AP 1131. 2 WLC: wlc-01 and wlc-02, wlc-02 config as backup wlc in the same mobility group. Client authentication:EAP with Microsoft IAS/AD.All AP have joined wlc-01. Wireless client work well with wlc-01.For testing I config access point AP01 have primary wlc: wlc-01, secondary: wlc-02 If I change config of AP01 like this: primary wlc: wlc-02, secondary: wlc-01. Client is hard to connect to wlc-02 and it only connect when client set static ip ALL wlc run this softwar image: 7-0-98-0 Should I send wlc-02 to warranty service?
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May 17, 2012
I do get this error all the time on my WLC 4402 logs:
"Could not Register IP Add on MSCB. MSCB still in init state. Address:e4:ce:8f:13:e4:de[...It occurred 2 times.!]"
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Jul 18, 2012
I have WLC 4402 working with AIR-AP1131AG-E-K9. Need to buy another pair. I looked to the side air-ap1041n-e-k9. Tell me whether or not the compatibility of the controller and the AP1041n? One more question. When buying in 1131 is still in the box and power cord to the point. The new 1041, the purchase comes with the point of the power cord?
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Jul 24, 2012
I am trying to setup a Wireless Network on my WLC that is totaly independent of our internal LAN. Port1 is designated at the .14.0 network and Port2 is the .18.0 network. The 14 network (Port1) will be the guest and 18 network (Port2) the internal wireless.
The issue i am having is nothing is routing to Port1. I have the Guest Wireless set to get DHCP from the WLC and i can get an address but i cant get internet access. I tried configuring a Network Route but it will only let me set the service port as the Gateway and not the IP for Port1.
I am running software version 5.1.151.0 and using this guide as it is the only one i can find. [URL]
Here is a screen shot of my Interface config.
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Dec 18, 2011
We are attempting to use LDAP for web authentication on a WLC 4402.
[URL]
You are able to connect to the SSID and it reidrects you to the login page as it should. When you enter your username and password you get a message that "the username and password combination you have entered is invalid." Based on the following log it looks like the LDAP bind is the issue.
*LDAP DB Task 1: Dec 19 11:19:26.584: %AAA-3-LDAP_CONNECT_SERVER_FAILED: ldap_db.c:1038 Could not connect to LDAP server 1, reason: 1005 (LDAP bind failed).
We are able to test the following configuration with ldp.exe successfully,
Server: ***.***.***.***
Port Number: 389
Bind Username: CiscoBYOT
[Code].....
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Jun 22, 2012
I tried to upgrade the cisco boorloader pf WLC 4402 from version 4 to 7.2. I updated ER.Aes FOR 7.2 (EARLY RELEASE.aes). It was updated perfectly and then I rebooted controller....now i can only see blank screen from connected console.I tried the flash of other lan controller but its not working because the issue is in the ROM as the boadloader file is in the ROM which is corrupted now i want the solution to upgrade the boatloader file inside the ROM.
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Jun 12, 2012
My customer has a 4402-25-K9 and need a backup (failover) controller to avoid data transmision break when primary controller goes down.4402 are end of sale so I have a question can I use 5508 to get Controller Failover Protection with 4402 ?
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Jun 6, 2012
We have two cisco 1262 AP and a 4402 WLC, the AP cannot join the WLC.
The AP gets the address from dchp
I cannot ping the AP address from the WLC, but i can ping the default gateway and other VLAN addresses.
I already read the info on the this link : [URL]
Still our AP cannot join the WLC no matter what i have tried.
Setup
- VLAN setup on a Cisco 3560 48 port poe Switch
- tunk configured btwn the Gi Interface and the Management physical port
- WLC mode is configured for Layer 3
- AP Manager and Management are in the same Subnet
- Option 43 is configured for the with the AP Manager's IP address
- Opotion 60 is also configured with AP Manager's IP address
- the port connected to the APs are in the AP Manager VLAN
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Apr 12, 2012
I have an issue with AP Fallback not working with two Cisco 4402-50 WLC's. Here is the senerio:
Site 1 has a 4402 (WLC01) running software 7.0.220.0 with 48 associated access points. AP Fallback is enabled in Controller > General and all 48 AP's are set to Critical failover with WLC01 being the primary controller and WLC02 (at site 2) being the secondary.
Site 2 is the location of WLC02 which is also running software 7.0.220.0 but has 0 ap's associated and also had AP Fallback set to enabled.
Your typical active/passive setup
The problem is when WLC01 goes down all of the AP's fail over to WLC02, however when the connection is restored to WLC01 we have to manually reboot each access point in order for them to reassociate back to the primary controller. Isn't AP Fallback enabled suppose to allow the AP's to move back to the primary controller once connection is reestablished?
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Nov 7, 2011
I ##have a customer with WLC 4402 in use, running software version 7.0.98.0, and supporting 11 APs at present. The customer wants to enlarge the WLAN, which involves increasing the number of APs. I #####have purchased a new WLC5508, and have installed it onto the network alongside the 4402. the 5508 is running software version 7.0.116.0. Because the wireless network is critical to the user, we want to move the APs over to the new controller while the network is up and running, then remove the 4402.
However, when we set the 5508 as the master controller, or tell one of the APs to use the 5508 as its primary controller, the AP connects to the new controller, downloads the new software version, attempts to load it but reports an error with the unzipped file size of the software and fails to boot. formatting the flash on the AP, then disconnecting the 5508 from the network and rebooting the AP allows it to connect to the 4402, it downloads the older software and boots as normal. A new AP, if connected to the 5508 in a test scenario (ie no 4402) connects, downloads and boots perfectly.
I #have the upgrade software to allow the 4402 to be upgraded to 7.0.116.0, but I am concerned that, if this is installed, the existing APs will then fail to boot from the 4402 or the 5508.all APs are 3502s, running IOS version 12.04(23c)JA when connected to the 4402 and 12.04(23c)JA2 on the 5508.
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