Cisco :: WLC2412 - Clients Not Receiving DHCP Addresses?

Apr 10, 2012

I recently upgraded a clients WLC and they keep saying they are unable to get an IP address from the DHCP server.  It's a simple, flat network and here is what the logs are showing. 
*apfReceiveTask: Apr 11 13:37:25.477: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'management'. Marking interface dirty.
*apfReceiveTask: Apr 11 13:37:17.278: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'management'. Marking interface dirty.
*apfReceiveTask: Apr 11 13:37:05.880: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'management'. Marking interface dirty.
*apfReceiveTask: Apr 11 13:13:47.397: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'management'. Marking interface dirty.


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Cisco Wireless :: Catalyst 6509e - Clients Not Getting Correct Dhcp Addresses

Sep 9, 2012

1. Core switch - Catalyst 6509e
vlans configured:
a. vlan 50 (wired clients)


here's the problem, wireless clients connected to WLAN guest keep getting DHCP leases from WLAN local (scope to 200)

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Cisco Wireless :: Clients Authenticating To 1231G Not Getting Assigned DHCP Addresses

Jun 24, 2007

Here at HQ we have a 4402 WLC. At our remote sites we have 1231G APs running in autonomous mode. I upgraded one of the APs -- IOS 12.4(3g)JA -- to run LWAPP. Per release notes I've read upgraded 1231's do not support REAP/HREAP mode, consequently, it's running in LOCAL mode.
The AP is managed by the WLC. I created a WLAN for the remote site and assigned it to the MGMT interface; the remote site subnet doesn't exist in HQ. The DHCP server for the remote site is presently at that site; AP and DHCP server reside at the same place.
Clients authenticate successfully to the remote site AP, however, they are not getting DHCP addresses assigned.  Does the DHCP server for the remote site have to reside in HQ since the AP is running in local mode? If so, where is that specified, on the MGMT interface config?

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Cisco Firewall :: Pix 515E Cannot Ping Or Assign DHCP Addresses To Inside Clients

May 6, 2011

I have a PIX 515E that I want to use to as a border between my internet connection and my Cisco AIR1131AG.  I have configured the PIX to have the outside interface as a dhcp client which gets its dynamic IP address from the cable modem. the AP is connected to the E1 inside interface. Now I could see the E1 interface from the arp table from the AP but I cannot ping it. From the firewall I don't see the ARP  table  from the firewall. and i cannot ping the AP. what is wrong with the configuration? side note, i am able to connect to the AIR1131AG from my laptop I was not able to retrieve an IP address. 
interface Ethernet0 description uplink towards the techsavvy modem speed 100 nameif outside security-level 0 ip address dhcp setroute !interface Ethernet1 description >>> WIFI LAN ACCESS <<< nameif inside security-level 100 ip address


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Motorola Surfboard's DHCP - Windows 7 Not Receiving IP From Device

Dec 4, 2012

I have a SB6121 Motorola Modem for my Comcast Service.The modem is supposed to give out an ip range of I reboot the modem I temporarily get a IP address but then somehow it changes to a ip.I can't get it to stick on the 192.168.100.x network so I can't access anything.Before I had my pc connected to a Netgear Router which received the internet from the SB6121 but I am needing to troubleshoot some issues with a freePBX server so I plugged straight into the gateway.

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Cisco :: Clients That Are Not Authenticated Taking IP Addresses - WLC 5508

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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Linksys Wireless Router :: WRT120N Drop Connection Just Prior To Receiving A DHCP Address

Oct 14, 2011

After an upgrade of the WRT120N to firmware Ver.1.0.06 (Build 01) every device I have tried to use WPA authentication with will authenticate / associate with the device then drop the connection just prior to recieving a DHCP address.I have tried a Dell latitude laptop with the broadcom chipset, an iPhone 3GS as well as an motorola with google pad device and all experience the same problems.I have removed all mac address filtering, and re-enabled the essid broadcasting only to have the same problem persist despite stripping everything down to just WPA.

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Cisco :: 2106 - APs Not Getting DHCP Addresses?

May 25, 2011

I've just installed a 2106 Controller at a remote site. The Controller is seen by the WCS at the main site so, connectivity is good and I'm able to login from the main site. I've configured the DHCP server which is at the Main site on the AP manager interface and the Manager interface and on the WLAN of the new controller but, APs are not getting addresses.

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Cisco :: DHCP Scope Not Handing Out Addresses

May 21, 2012

I've created a tonne of dhcp scopes on my routers before never had any issues, however this one will not hand out any addresses at all, i even give the router a reload to see if any magic happened but nothing, ive ended having to put a temp server in with just dhcp installed until i get the router diong what it should my config below, its something simple i havent seen, as ive compared it to plenty of my working DHCP configs and seen nothing.

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Configure DHCP To Use Two Different Range Of IP Addresses?

Sep 5, 2011

How can i configure DHCP to use two different range of IP addresses. One range will be for example 192.168.0.* and the other range will be 192.168.1.* When the first range of ip is full the DHCP automatically assign IP addresses from the second range.

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Cisco Wireless :: WLC - Incorrect DHCP Addresses Being Allocated?

May 13, 2012

Initially there were 3 SSIDs configured but all of them were assigned a single interface and this interface was configured with the controller management IP address as DHCP server so that the WLC could assign IP addresses to wireless clients, guns and printers etc.
Issue: As part of PCI initiative, we decided to segment the traffic in multiple subnets based on type of wireless clients; so now there are 3 interfaces configured and each SSID is assigned a specific dynamic interface and each interface is configured to use the controller management IP address as DHCP server.
There are 3 scopes configured for each of the dynamic interfaces/SSIDs and DHCP proxy is enabled but wirelss clients are still being allocated IP addresses from the original DHCP scope that was associated with the dynamic interface originally assigned to all 3 SSIDs.
I verified the following:
1. Each SSID is assigned a different dynamic interface (Users, Voice and Handhelds)

2. Each dynamic interface is configured to use controllers management IP address as DHCP server

3. DHCP scopes configured with correct network information for each dynamic interface and enabled

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Cisco Wireless :: LAP1142N Cycling IP Addresses From DHCP

Feb 12, 2013

I have a LAP1142N that is connected to a 3560 nonPoE switch (using compatible power injector) that will not associate to the controller I have set-up. The wireless is existing and I have about 11 other APs connected to the controller with no issues. The AP will pull an IP address from DHCP running on the primary controller. The AP pulls a new IP address in roughly a minute. I set the pool to be 3 IP addresses and set a contant ping to each, there is about 1 request time out before the next IP address starts pinging. I went to the controller and pulled the following message error from the log.

*Feb 13 14:24:58.614: %LWAPP-3-HDR_ENCAP_ERR: spam_lrad.c:4216 Unable to encapsulate LWAPP header for discovery response; AP (APs MAC address)
*Feb 13 14:24:58.614: %APF-3-PDU_ENCAP_FAILED: apf_net.c:771 Failed to encapsulate a PDU for transmission to station00:00:00:00:00:00. Destination IP address not set in L3 mode.
I have tried a different cable, connecting to a PoE switch, different controller, larger DHCP range, hosting DHCP on the distribution switch, I am awaiting console access to the AP since this is remote work. The controller is running Software Version Thoughts?
console inventory output from GUI
Model No. AIR-WLC4402-25-K9
Burned-in MAC Address XXXXXXXXXX
Maximum number of APs supported 25
Gig Ethernet/Fiber Card Absent
[Code] ....

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Cisco Wireless :: 5508 WLC Not Releasing DHCP Addresses?

May 1, 2013

Have a WLC 5508 running 7.0.230 with internal DHCP server. Timeout is 3600 seconds. The IP addresses never seem to be released. The controller will show 70 clients but 254 addresses will be assigned.

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Cisco Switching/Routing :: SG 100-16 Switch - 2 DHCP Addresses

Jan 11, 2012

I currently have a the following configuration and am unable to get more than 2 DHCP addresses for the devices connected to the Cisco new SG 100-16 Switch.The AP have no trouble handing out DHCP to the wireless clients, but we are unable to get the SG 100-16 to be able to do the same thing to wired clients.  It is currently connected to the 2960-8 in port 1.  We can get 2 devices connected without a problem, but the 3rd machine and beyond do not work.  Also, setting up a static IP does not work.  Using a static will not even allow us to ping or tracer back to any devices beyond the SG 100-16.

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DG834 Allocates IP Addresses Using DHCP To 5 Computers

Oct 6, 2011

Netgear DG834 allocates IP Addresses using DHCP to 5 computers and 2 tills, the tills addresses and one computer IP addreess are reserved and fixed, so that data can be downloaded from the tills to this computer. However I had to re-format the computer and the Router now allocates a new IP address to it, which the tills cannot recognise, so I cannot download the data from the tills to the computer. Is it possible to change the newly allocated Computer IP address in the Router back to the old one.

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Router DHCP Handing Out IP Addresses Not On The Same Subnet?

Dec 22, 2011

I have a Belkin model F9K1102 router supplying WAN/LAN connection to three PCs and 2 laptops. Two of the PCs are hardwired with the remainder PC and laptops are wireless. I'm using the default router IP of and my ISP is Charter Cable (if that's of significance). The router is picking up all the dynamic IP information from my ISP and internal DHCP is enabled. Here's the issue though - when I connect a PC, laptop or iTouch (wired or wireless) with obtain IP settings automatically enabled the IP address it receives an IP address on a different subnet ie, 192.168.3.x and thus won't have WAN/LAN connection. I have tried to set the router IP to and set the scope in the .3 subnet but the IP obtained by the device is .4! This makes no sense to me at all. The router is on the latest firmware (according to Belkin) and there doesn't seem to be any other update I can find. I have also tried another Belkin router (older model: F5D8236) and it does the same thing.

I'm not sure if this is related but I upgraded my service with Charter to a 18MB connection and a D3.0 Ubee cable modem - this issue seem to have began after this upgrade but I don't see how that would have any bearing on what is happening on my LAN IP scope and Charter tech support is pretty useless. My workaround is that I've static assigned an IP for each device in the same subnet as the router but it would be nice for the DHCP to function correctly.

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AAA/Identity/Nac :: ACS 5.3 - Assign Ip Addresses From A DHCP Server?

Dec 8, 2011

I imagine I can use the framed-ip-address attribute to assign ip-addresses but there seem to be support for static ip addresses only?A bit of a drag when we're talking 200+ nodes.

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Cisco 2611 Router - Enable To Hand Out Addresses Through DHCP

Oct 4, 2012

I have a wireless access point, I want to be able to hand out addresses via the Cisco router through DHCP on the interface eth0/1. The wireless users that get an IP I want then route out the eth0/0 interface to my statically assigned default gateway. Right now Im not concerned with setting up security measures once this works I'll go back in and add that. Here is my running-config. Right now nothing from the is being routed out to the internet.

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Cisco :: DHCP Server No Longer Handing Out IP Addresses On Network?

Jun 16, 2012

I have a LAN with about 200 computers ( with a DHCP Server on Windows server 2003.The problem is that my company have acquired 100 others computers that I have connected on this network.Some computer does not get IP address from the DHCP server. When I investigated the log of the DHCP server, I realized that the DHCP server was out of addresses.

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Cisco Firewall :: ASA5505 / Pcs To Get Their IP Addresses Directly From DHCP Server?

Feb 7, 2012

We have a Cisco 5505 ASA fireawll at a remote site. I can get the firewall to issue the IP addresses to the pc's, Is there a way for the pc's to get their IP addresses directly from our DHCP server?

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Cisco Switching/Routing :: 861 Need DHCP Server With Static IP Addresses

Feb 2, 2013

I used to use a CentOS self-made server for intranet for my little office, but I bouth few days ago a Cisco 861 router to replace the linux box.
1. I have 2 public IP classes from my ISP. 1 class is limitted to 80mbit upload, the other to 30mbit upload. So I need some sort of DNAT to be able to know exactly which intranet computer uses big internet and which one limitted internet.
2. I need DHCP server and with static IP addresses (one computer must always have the same IP address, etc).. i have my needs for this.
3. Also I need external access to some servers inside (web, ftp, etc) [code]
So far so good, all looks simple and I can achieve this in 2 hours on a centos linux box (correct routes, ip forwarding enabled and few iptables rules for NAT/SNAT/DNAT).
But on this brand new Centos router well, i'm not even successful in pinging the outside world, nor the inside world I'm tired of reading the forums, the documentation..i want (at first) a simple scenario: vlan+dhcp, fa4 with 1 public ip address and ACCESS to the real world. I wasn't able to achieve not even that much. [code]

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Cisco Switching/Routing :: 3750 Not Handing Out DHCP Addresses

Nov 2, 2011

Had a problem with a 3750 this morning not handing out DHCP addresses.  The following is a sanitized config of what the switch is using. [code] The IOS installed on the switch is c3750-ipbasek9-mz.122-55.SE1.bin.  What got my attention was that the sh ip dhcp pool PC showed 180 addresses being excluded.  In doing the math from the dhcp excluded addresses, only 64 should be excluded.
My next step was to remove the second dhcp excluded-address line above.  Doing a clear ip dhcp binding * started letting the DHCP service hand out addresses but the sh ip dhcp pool PC stil showed 180 addresses excluded.
It finally took removing the dhcp pool and putting it back in to drop the number of excluded addresses down to a value that matches the first excluded-address line.  Didnt see a dhcp bug in the bug database that would explain this.
I tried re-entering the second excluded-address line from above and saw the number of excluded addresses rise as expected.  When I negated the line, the number of excluded addresses dropped back to its previous value.

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Increasing Number Of Addresses And Dhcp Address Range

Dec 2, 2011

A small network and uses the Linksys Router BEFSR81 as dhcp.the default Number of addresses is 50 and starts to new Cisco IP Phone just introduced requires ip addresses and have noticed running out of addreses.Can I increase the number to 120 so that the address range would start from to, also, I have a VPN device which automatically configures itself for address and this is /24 network configuration.

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Cisco Wireless :: 881-W Wi-Fi Clients Not Getting DHCP?

Mar 8, 2009

I'm monkeying around with an 881-W.  Clients can associate and authenticate to ssid 'test', but they cannot get a DHCP address.  Clients plugged into f 0 - 3 get DHCP addresses just fine. 
I've looked at a lot of different guides, ran debugs etc.  When wifi clients make DHCP requests the server never gets them.  So there must be some IRB thing going on.

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Cisco Wireless :: Can Aironet 1130ag Assign IP Addresses Through DHCP Running

Jan 20, 2010

The 1130ag was the LAP model but I upgraded it to run in autonomous mode.  My understanding is that it cannot assign IP addresses but I just want that confirmed.  It is not connected to a WLC nor a server that can do DHCP.

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Sep 28, 2010

I currently have DCHP server set up on my new 1141N. Everything works great, but I wanted to know if it were possible to make the DHCP server only hand out ip addresses on the wireless connection? Currently the AP is giving out ip addresses from the pool to wired and wireless pc's.

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Sep 17, 2012

I have an out of the box configured RV220W and was wondering if it supports local DNS resoltuion for DHCP addresses it issues. I have a few reservations and a custon search domain configured ('local') but it will not resolve a name fromt the terminal using the search domain (see below):
It resolves freenas but not freenas.local.
macbookair:~ brantwinter$ dig freenas
 ; <<>> DiG 9.8.1-P1 <<>> freenas
;; global options: +cmd

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Cisco :: Setting Up DHCP For VPN Clients On ASA 5510?

Jun 30, 2011

I'm trying to understand my options for assigning addresses to VPN clients on an ASA 5510. Under the ASDM, I have a field for DHCP servers, radio buttons: none, dhcp link, dhcp subnet, and field: client address pools. Cisco's VPN examples demonstrate setting up a client address pool, which I did, but the VPN client isn't assigned a gateway in the process so it can't connect to anything; I really don't understand the point of this. I'd like to create a DHCP pool on the ASA for VPN clients as this seems to be the standard configuration. However, I don't know where in the ASDM to configure this and how it's applied. The only DHCP options I found involved creating a DHCP server on an interface, which I don't want to do since VPN users aren't on a physical interface, right?

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Cisco Wireless :: No IPs From 2504WLC DHCP To Wi-Fi Clients

Mar 29, 2012

I have new 2504 WLC + 1041LAP. I configured the first DHCP scope on WLC and the first WLAN. Then I set WLC DHCP server in WLAN properties and tried to connect to WLAN with wireless clients.
My wireless clients are able to authenticate on WLAN, but not able to get IPs from DHCP. The only lease that DHCP shows is for 1041LAP.
If I set permanent IPs on my wireless clients, they can connect and ping WLC.

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Cisco :: WLC 4402 With 6.202 Can't Give Dhcp To Clients

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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Cisco :: WLC2100 Not Issuing DHCP To Clients?

Jan 20, 2011

I've got a 2106 that I'm installing for a customer and having issues with it assigning DHCP to WiFI clients.  What's odd is that this was working at one point at home during testing.  Only difference at this point is LAN hardware at the customer location.
Simple config-  single flat vlan on Cat2960G switch, ASA5505 serving up DHCP for the network.  Wired clients are receiving DHCP fine.
Mgmt IP192.168.0.10/24Mgmt Gateway192.168.0.1Mgmt VLAN0Mgmt Int port1Mgmt DHCP server192.168.0.1AP Mgr Int IP192.168.0.11Virtual GW IP1.1.1.1RF group namerfgrp1SSIDxxxxClient Static IP?noCountry Code802.11a/b/g statusenabledRadio resource mgmt statusenabled I've run dhcpd debug on both the controller and the ASA and I see the DHCPD requests on the controller, but I never see them hitting the ASA.
I don't have the specific version of code it's running, but I know it's 6.0.  One of my local Cisco account engineers found some Cisco CSC bugs referencing this issue.  One TAC cas even referenced stripping all security off the WiFi, connecting the client and then reimplementing the security again.

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Unknown DHCP Clients In D-link DIR-615?

Aug 2, 2011

When I go into the Network Settings, and the end of the page I find a list named "Number of Dynamic DHCP clients: 7". As far as I know, I should only see 4, all 4 laptops; however, I see 2 UNKNOWN entries in this list, and one name "Macondo". Each of these entries have an option (a link) saying "Revoke" and other "Reserve". I am just wonder if these entries are intruders in my home network. What should I do? I am afraid to break my internet connection. By the way, I set up every single one of my family 4 laptops at home with a WPA-PSK using a very long key.

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Jan 6, 2013

I've just discovered this thing in Windows Event log. The DHCP-Client log is full with this: the client received a NAK from the DHCP Server. Strangely, they still get the desired IP address. (Which are reserved adresses for the MAC adresses.)So I've looked at the logs in the DIR-615 (rev.D, FW: 4.13), and found this:

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