Cisco Wireless :: WLC 4402 Multiple Clients Can Connect To AP But Only One Gets An IP

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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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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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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[code]...

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Side Catalyst 6509 : cata6#sho running-config interface gigabitEthernet 8/15 Building configuration...
 
Current configuration : 224 bytes
!
interface GigabitEthernet8/15
switchport

[Code].....

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Feb 10, 2011

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Jun 11, 2012

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Dec 10, 2012

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Nov 15, 2011

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Product Version.................................. 7.4.100.0
Bootloader Version............................... 1.0.16
Field Recovery Image Version..................... 1.0.0
Firmware Version................................. PIC 16.0
 
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Jun  3 08:58:58 192.168.224.1 WLC1: *dot1xMsgTask: Jun 03 08:58:51.176: #DOT1X-4-MAX_EAPOL_KEY_RETRANS: 1x_ptsm.c:456 Max EAPOL-key M1 retransmissions exceeded for client 7c:e9:d3:f4:74:4d

[Code].....

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