Cisco :: WLC 5508 - Clients Can't Obtain IP Address Via DHCP
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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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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Dec 15, 2011
I am struggling with the following issue. I have 6 1130 Accesspoints in lightweight mode connected to a 2106 wlan controller which runs software version 7.0.98.0. Everything seems to work fine. Clients can connect to the wifi network. However, they don't get an ip address from the dhcp server which is on the same subnet as the wlan controller. See attached screenshots for configuration. I have also tried the internal dhcp server of the wlan controller, but the same problem remains.
The logs says: Dropping primary discovery request from AP e8:b7:4x:xx:xx:xx - maximum APs joined 6/6 There are 6 AP's connected
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Jun 17, 2011
I have an Avaya IP Phone for work. This has been tested at work and works as expected. After the IP Phone boots it's able to obtain an IP address from work. At home when I plug the IP phone into my DIR-655 router, it's unable to obtain an IP address. Other network devices are able to obtain an IP address, for example any computer or laptop. Also my wireless works with no issues expect for the IP phone. I've already done some searching and found other users with the same issue but I haven't been able to find a solution other than setting a static IP address. I'm curious why this relatively new router won't work with an IP phone. I've played with some of the router settings but it didn't make a difference. Any work around to get the DHCP to work? I'm running the latest firmware for my router: 1.35A Hardware Versions: A4.
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Apr 14, 2013
I have two ethernet cards (from same equipment) that arent acquiring IP Address after instalation of WLC 2504.I dont want (yet) to disable DHCP proxy on WLC.
*DHCP Socket Task: Apr 15 18:49:04.219: 00:0a:95:XX DHCP received op BOOTREQUEST (1) (len 556,vlan 0, port 1, encap 0xec00)
*DHCP Socket Task: Apr 15 18:49:04.219: 00:0a:95:XX DHCP dropping packet (no mscb) found - (giaddr 0.0.0.0, pktInfo->srcPort 68, op: 'BOOTREQUEST')
*DHCP Socket Task: Apr 15 18:49:07.218: 00:0a:95:XX DHCP received op BOOTREQUEST (1) (len 556,vlan 0, port 1, encap 0xec00)
*DHCP Socket Task: Apr 15 18:49:07.218: 00:0a:95:XX DHCP dropping packet (no mscb) found - (giaddr 0.0.0.0, pktInfo->srcPort 68, op: 'BOOTREQUEST')
[code].....
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Feb 20, 2013
2 days ago, my laptop was connected to my router and working fine. But it then randomly disconnected and haven't been able to connect back since. I am using an ethernet cable to access the internet, and have tried many ways to try and resolve the issue but nothing is working.
I have a Dell L501x (Win 7 64-bit) with the Intel Centrino 1000 BGN wifi card. I have restarted the router and modem and disconnected all devices and tried reconnecting, but to no avail. I have tried updating the drivers, system restoring and using safe mode (with network) but nothing works. The modem and router are working fine as other devices connect and access the internet, it is just my laptop that cannot.
I am sure it is not a hardware issue as the card detects all the surrounding networks. The troubleshooter only says "An administrator profile failed to obtain an IP address from the DHCP server.
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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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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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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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Feb 12, 2013
Im facing with some DHCP lease issue and its like this,Our Cisco 2951 edge router is configured with local dhcp pool for a set of remote users when they connect through Cisco VPN which was working fine until we planned to change it to a Windows box that is configured for DHCP.The basic idea now is to relay the DHCP requests that are coming from the remote clients through Cisco VPN to the DHCP Windows server. So we added the scope on the server and changed the client config on the router as follows (highlighted is the dhcp relay config). [code]
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Oct 30, 2012
with our WLC 5500 controller, once the clients get the DHCP address the page is not redirecting them to the guest portal.What is the best way to check as to why the redirection is failing.
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May 26, 2013
My 5508 WLC which runs version 7.4 is configured as a DHCP server for the AP management and here's my problem: My AP can get to the address, and can ping the address of the WLC management，But my AP prompts the following log： [code]
In the switch dhcp we can use to do the WLC option43 specified address, but in this case how the address specified WLC, the AP can be registered up?
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Aug 23, 2012
I just got a WAP321 to replace a very frustrating WAP4410, what is the the SNMP OID to obtain associated wireless clients for each of the SSIDs ? I'd be happy with any OID for client numbers so total clients associated will be fine.
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Mar 29, 2012
I have 2 units Cisco WLC 5508 running software version 7.0.220 with 70 over units Cisco AP 1262N and 1242AG. Some of wireless clients having problem to get the correct IP address from the DHCP server. There are 2 units of Microsoft DHCP. Both DHCP server ip have been configured on the Interface at the WLC. The core switch also being configured with ip helper. I've attached the debug output of one of the wireless client during the problem.
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Feb 23, 2012
In our test set up, we have two WLC 5508 Controllers connected via Checkpoint UTM-1 firewall Inside and DMZ Interfaces. Both the WLC controllers are connected to the firewall via Cisco 3750 switch. On the Local (Inside) Controller, guest SSID is enabled and attached to the wireless management Interface. On the remote anchor controller, guest SSID is enabled and attached to the Management Interface as well. The following configs are replicated on both the Controllers.
SSID Name - guest
Interface - Management ( VLAN 10 on Local and VLAN 20 on remote) -
Mobility Group: Same configs at both ends
SSID Anchor : Anchor SSID on local and local SSID on Anchor.
AP: CAPWAP 3502 Management Subnet
[code]....
Is there any thing missing in the wireless configs and or the firewall rules as i could not see DHCP request back from the Anchor Controller. Also, after DHCP is obtained, the web authentication request will be redirected to an Amigopod device for authentication. In this case is the redirect URL congiguration to be performed only on the Anchor Controller or is this to be replicated on both the Local and Anchor Controllers.
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Sep 14, 2011
I cant to obtain DHCP-address on WAN interface. All over hardware can (windows-based systems and Asus RT-N10), but not Cisco 881 Also i cant to obtain ip even from Asus RT-N10 with this configuration:! version 15.1 service config no service pad service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Router ! boot-start-marker boot-end-marker ! ! ! no aaa new-model memory-size iomem 10 ip source-route ! ! ip cef no ipv6 cef ! ! crypto pki token default removal timeout 0 ! ! license udi pid CISCO881-K9 sn FCZ1523C3RR ! ! username admin privilege 15 secret 5 $1$0H8v$xx/HtPJIllcFvEWFjzI5t/ ! ! ! ! ! ! interface FastEthernet0 ! interface FastEthernet1 ! interface FastEthernet2 ! interface FastEthernet3 ! interface FastEthernet4 ip address dhcp ip broadcast-address 0.0.0.0 duplex auto speed auto ! interface Vlan1 ip address 192.168.4.1 255.255.255.0 ip broadcast-address 0.0.0.0 ! ip forward-protocol nd no ip http server no ip http secure-server ! ! logging esm config ! ! ! ! ! control-plane ! ! line con 0 exec-timeout 0 0 logging synchronous login local no modem enable line aux 0 line vty 0 4 exec-timeout 0 0 logging synchronous login local transport input all ! end After thousands experiments next configuration started to obtain ip from Asus RT-N10 , but not from ISP ! ! Last configuration change at 12:22:25 UTC Tue Sep 13 2011 by admin ! version 15.1 no service pad service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Router ! boot-start-marker boot system flash c880data-universalk9-mz.151-3.T.bin boot-end-marker ! ! ! no aaa new-model memory-size iomem 10 ip source-route ! ! ! ip dhcp relay information trust-all ip dhcp compatibility suboption link-selection standard ! ! ip cef no ip dhcp-client broadcast-flag no ipv6 cef ! ! crypto pki token default removal timeout 0 ! ! license udi pid CISCO881-K9 sn FCZ1523C3RR ! ! username admin privilege 15 secret 5 $1$3bFL$y/cxqQLd.8cixPrtETEJ4. ! ! ! ! ! ! interface FastEthernet0 ! interface FastEthernet1 ! interface FastEthernet2 ! interface FastEthernet3 ! interface FastEthernet4 ip dhcp relay information trusted ip dhcp relay information check-reply none no ip dhcp client request tftp-server-address no ip dhcp client request netbios-nameserver no ip dhcp client request vendor-specific no ip dhcp client request static-route ip address dhcp ip broadcast-address 0.0.0.0 duplex auto speed auto ! interface Vlan1 no ip address ip broadcast-address 0.0.0.0 ! ip forward-protocol nd no ip http server no ip http secure-server ! ! logging esm config ! ! ! ! ! control-plane ! ! line con 0 exec-timeout 0 0 logging synchronous login local no modem enable line aux 0 line vty 0 4 exec-timeout 0 0 logging synchronous login local transport input all ! end ISP's hardware based on Juniper.What else must I switch of/on to start DHCP-client?!
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Oct 6, 2012
I have simple set-up in my network with 2 routers connected to each other, 2nd router is just kind of wireless access point and switch to extend cable sockets upstairs.I have DHCP reservation on the first router and it works perfectly. Second router has DHCP server disabled, and I have configured DHCP reservation same as the first router, but it gives random IP addressess instead of reserved. how can I configure second router to obtain MAC DHCP RESERVATION TABLE from the 1st router?
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Mar 7, 2012
I have configurate AP1230 as DHCP server. And I have 2 vlan and SSID :
vlan 1: office use
SSID: OFFICE
vlan 11: guest use
SSID: GUEST
Now the user can login with OFFICE's ssid for obtain IP from windows server 192.168.3.4. But GUEST's ssid can't obtain IP after login.
ip subnet-zero
ip dhcp excluded-address 10.0.0.1 10.0.0.20
ip dhcp excluded-address 10.0.0.40 10.0.0.254
[Code].....
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Apr 5, 2012
I would like to know on how can i setup my cisco 877 router at my small office. Here are the things that i need to do:
1. I need enter the internet static ip address 61.10.xx.xx/subnet mask/gateway/dns provided by my ISP.
2. I need to configure the cisco router DHCP so that the 4 computers can obtain an IP automatically. Howow can i accomplish this setup.
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Mar 12, 2012
Currently i have multiple computers that are connect via lan with ip addresses(static) that are connected to a cisco router. My question to you, how do you assign more ip addresses to computers on the lan.
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Apr 8, 2013
I have installed about 2 days ago one Cisco WCS 2504 and 11 APs. Everything is doing well regarding to WEP authentication. But I have a Radius Server that is alson running with some issues on wireless:
- Unless I open network settings and click connect on that config I cannot obtain a valid IP Address;
- Roaming is not working also;
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May 11, 2011
I coulden't visit any websites and it gave me an "error 105" something. So i tried connecting my other comp to the internet cabel with the same result. So i tried to find a solution on the web (wierless internet still worked) and stumbeld upon a similar problem were the answer was to manually fill in an adress in the "internet protocol version 4" properties in the "local area connection" properties. I then noticed that i dident have the "Obtain DNS server address" set to automatically and that the other manual boxes were empty. I then turned the auto on an i had access to internet. Is this safe? Cause i read somewere that DNS server addresess were provided by the company that provide you your internet service, and that you can be redericted to a fake website that can get a hold of your account information on it
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Oct 19, 2011
Anyway, I have an hp desktop pc, running windows 7, with high speed cable connection.. Im attempting to obtain a new ip address.. but when I go to command prompt, and type in ipconfig/release, I get an error telling me that "No operation can be performed on Local Area Connection 2 while it has its media disconnected"
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Feb 7, 2011
I have a netgear wireless router, not sure on the model but can find out if required. My xbox360 is hard wired to the router and my Laptop is connected wirelessly to the router using the internal wireless connection on the laptop. The other half has a laptop too, for some reason her will not connect wirelessly, just gets stuck on a constant loop of ''aquiring ip address'' and does not get past this point. Laptop works if hard wired to the router. how do i get ip address to assign.
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Aug 28, 2012
I have a Lexmark Professional X7675 that will not connect to my wireless network saying "unable to obtain IP address". This printer was previously connected to the wireless network with no issues. I did a reinstall on my computer and a reset of the printer network settings but still it will not connect to the wireless. The SSID and the WPA are both correct.
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Sep 22, 2011
I just got the motorola droid 3, my first android device. I'm trying to figure out how to get my device to connect to my network as it won't obtain the IP address.I have a Motorola Surfboard SBV5120 Modem and a Microsoft MN-700 router. I just switched from the Palm Pre Plus which connected perfectly to this network, the network is unsecured and has 2 pc's and a 360 running on it. I was able to connect to my friend's wireless network fine at his house.
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Sep 10, 2012
My Fujitsu Siemens AMILO XI-1554 RTL8169/8110 ethernet will not obtain IP address on any other LAN, except my home network. The adapter is set to obtain IP address automatically. I have updated the drivers using the Update Driver option on Windows 7 Ultimate 32-bit.
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Dec 14, 2011
we have Core-Siwtch 4503 in the main building which is connected to another Core 4503-E in another building ,, now our PCs connected to the 4503-E ,,, any XP M/C can pick an Dhcp-ip but and M/C run Win.7 Cannot !!
action taken :
1st we try to connect our win 7 pc in the node which was connected to xp M/C ,, and it didnot take ip from the DHCP . ,, 2
2nd we ensure from the core-switch configuration and its normal with no mistake
3rd trying to use tool from Microsoft Fix-it Center whih name is ( Microsoftfixit 50475 ) which is just .msi file but the problem face us is that this tool donnot accept to run on win 7 cause its made for vista .
4th after some researchs we notic that there is some modifications have to be performed on registery by disabling the dhcp broadcast flag we did it but nothing change yet
5th now we are waiting to perform another action which is Disable the IP Helper service in win 7
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Dec 20, 2011
what application/service is sending out net bios broadcasts on a network segment the requests are for machines that no longer are on the network but something is trying to obtain there ip address as they are not in dns any more i am assuming this is why they are resorting to netbios broadcasts i need to some how isolate what application or service is trying to find out.
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Jan 23, 2011
I've had the adapter for a while now, successfully running on XP SP3 with the linksys software. I could see networks, connect to them with WPA security and get an IP address. I recently tried uninstalling the software, then connecting the adapter to install only the drivers and let windows manage it. Since then, I haven't been able to acquire an IP address. It can see the SSID and connect to it, but continually tries to acquire an IP address. I've tried this with different SSIDs at work and home...same result. I've tried uninstalling the driver from device manager, but every time I restart and connect the adapter, windows recognizes the adapter. I probably made matters worse by connecting another adapter to it, in an attempt to work around the problem. That is a USB adapter, WUSB600N. Tried the same thing, but continually tries to acquire an IP address.
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Nov 5, 2012
I am trying to connect my WDTV Live to my desktop PC, and I connect to the net through a wireless connection to my router. Because its in the other room, I can't connect my WDTV Live to the router without running cable along the floor. Having said that, its not far away from my desktop PC, so I'm trying to connect them directly via cable. The problem is that my WD keeps telling me that it can't obtain an IP address and I don't know how to fix it or what values to put in.I've tried power cycling, manually setting an IP address (192.168.0.5), using different cables, all with no success[CODE]
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Nov 9, 2012
I have recently bought a Asus Eee PC with Windows 7 starter.It will connect ok to public Wifi (i.e. at the Qantas lounge) but will not connect to my home Wifi network - Netcomm N150 Router. The two other computer at home (running full versions of Windows 7) work fine over this network.When I look at the Station list in the Router's interface the MAC address for the new laptop appears but it has no IP address. [code] Have tried the obvious things like power cycling.
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Dec 12, 2012
My set up is a 2wire router that connects to the internet, with an ethernet power plug connected to it. Over the other side of the house, I have the other ethernet power plug connected, with a Netgear router in access point mode.The main router is on 192.168.1.1, and the access point is on 192.168.1.3. The DCHP server is enabled on the main router with range 192.168.64 to 192.168.1.253. The access point has the DCHP server turned off. The routers have the same APN and security (WPA2-PSK).Also, the wireless channels don't overlap, channel 1 and 11.Now to my problem:The internet always works fine for a few days when the routers are turned on. But at some point between 1 to 3 days later, every computer can't obtain an IP address while connected to the access point. But all computers can connect to the main router (i.e. when closer to the main router than the access point), and then go near the access point and it keeps the connection. If I reboot the access point, then everything works again for a few days.
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