Cisco Wireless :: WLC 2504 - Internal DHCP Server Not Working
Mar 25, 2013
setup a DHCP server on a WLC 2504. I'll try to resume my configuration:
I have 2 networks: inside users (vlan 1) and external users (vlan)
My controller uses the port 1 to connect to the switch, which has a trunk with WLC.
I have two routers, one using vlan 1 (192.168.3.0/24) and one using vlan 10 (200.X.X.X). All ports to these routers are access ports on their respective vlans.
I have 2 SSID, one for inside, other to outside. Inside is working very well.
To the outside I created a DHCP escope and already set the IP of the management interface 192.168.3.119.
Managemente interface (vlan 1 inside): 192.168.3.119/24
Outside interface (vlan 10): 200.X.X.195 - Default gateway 200.X.X.X.193
I alredy checked the DHCP Proxy in Advanced option.
See the output of the debug client:
(Cisco Controller) >
(Cisco Controller) >
(Cisco Controller) >
[Code].....
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Nov 25, 2012
I am wondering if the folowing is a valid configuration:
WLC2504
AP2600
I need 3 SSID/VLAN, 1 for corporate devices, 1 for coporate smartphones, 1 for guest.
Port 1 on the 2504 should be used for management and corporate devices and connect to the corp network. Port 2 is for smartphones/guest and will be connected to a Cisco ASA 5515 that is connected to a second ISP.
Corp devices should get IP from an Windows DHCP. Smartphones/guest should get IP from the WLC. Is this possilbe? I read this in a document "To use the WLC as a dhcp, you need to enable DHCP proxy as it is required." Some how I am imagining that this will mess with the Windows DHCP. Is it better to use the ASA as DHCP for smartphones/guest?
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May 21, 2013
I have a 2504 WLC and 1042 ap's. Everything worked great in my test enviroment (of course). Now when I want to deploy the wireless, the ap's are not getting and ip for the windows dhcp server.
I have option 43 configured in dhcp, sub option 241>ip address of the controller
I have my A record in dns, cisco-capwap-controller.
*Mar 1 00:03:17.050: %CAPWAP-3-ERRORLOG: Not sending discovery request AP does not have an Ip !!
Not in Bound state.
*Mar 1 00:03:27.050: %CAPWAP-3-ERRORLOG: Not sending discovery request AP does not have an Ip !!
*Mar 1 00:03:27.054: %CAPWAP-3-DHCP_RENEW: Could not discover WLC using DHCP IP. Renewing DHCP IP.
*Mar 1 00:03:37.054: %CAPWAP-3-ERRORLOG: Not sending discovery request AP does not have an Ip !!
*Mar 1 00:03:47.054: %CAPWAP-3-ERRORLOG: Not sending discovery request AP does not have an Ip !!
*Mar 1 00:03:57.054: %CAPWAP-3-ERRORLOG: Not sending discovery request AP does not have an Ip !!
*Mar 1 00:04:07.054: %CAPWAP-3-ERRORLOG: Not sending discovery request AP does not have an Ip !!
Not in Bound state.
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May 7, 2012
I am hoping to get your feedback around the dhcp issues I am facing with Two Centrally Switched Wireless LANs. The setup is as follows:
- I have a WLC 5508 which has been configured with 4 SSIDs, out of which 2 are using Central Authentication and Switching. - I have an LWAP connected to the WLC in HREAP mode. - WLC is configured as the DHCP server for clients connecting to the SSID 'Guest'. For the rest, I am using external dhcp server. - Only one scope for Guest Interface is setup on the WLC.
Problems:
1. As far as I know, for WLC to act as internal dhcp server, it is mandatory to have the proxy enabled, but the Clients connecting to SSID 'Internet' are unable to get an ip address from the external dhcp server, if dhcp proxy is enabled on the WLC. If i disable the proxy, it all works fine.
2. DHCP does not release the ip addresses assigned to clients even after they are logged out.
3. If a machine which was earlier connected to 'Guest' SSID connects to the 'Internet' SSID, it requests the same ip it was assigned by the WLC which it was assigned under 'Guest', but gets tagged with the V LAN configured on the management interface.
************Output from the Controller********************
(Cisco Controller) >show sysinfo
Manufacturer's Name............. Cisco Systems Inc.Product Name................ Cisco Controller Product Version................. 7.0.116.0Bootloader Version................ 1.0.1Field Recovery Image Version..................... 6.0.182.0Firmware Version..... FPGA 1.3, Env 1.6, USB console 1.27Build Type.......... DATA + WPS + LDPE
[code]...
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Jul 21, 2012
A client wants us to use the internal DHCP server on a 5508 instead of Windows DHCP. They will have 15 APs initially and upto 25 later. The docs on the 7.2 WLC make it sound like this is discouraged: Internal DHCP Server.
The controllers contain an internal DHCP server. This server is typically used in branch offices that do not already have a DHCP server. The wireless network generally contains 10 access points or fewer, with the access points on the same IP subnet as the controller.
In this case, the APs will not be in the same subnet as the Managment Internet.Is it a mistake to use the internal DHCP with upto 25 APs (3 WLANs)?
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Apr 8, 2008
I am trying to setup a guest vlan. I set up an interface for the guest vlan on my 4402 controller. I assigned the guest vlan interface an IP of 192.168.2.10 with a 24 bit subnet mask.
This vlan will go to my DMZ where there is no DHCP server so I need to setup the internal DHCP server. I created a new scope but I'm having trouble with what to put in the Network field for the DHCP scope. The pool addresses are 192.168.2.100-200. with a 24 bit subnet mask.
Every time I try to apply the configuration I get an "error in setting DHCP scope network and netmask".
I've tried using:
192.168.2.10
192.168.2.255
192.168.2.254
as entries for the Network setting but no go. The docs say to enter the IP address used by the management interface with subnet mask applied.
I was assuming they meant the interface for the guest vlan.
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Jan 12, 2012
How to clear dhcp lease in WLC 6.0.199 from the IP leased from internal server?
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Apr 5, 2012
I've got a new CT2504 controller with software version 7.0.220.0 Regarding to [URL]I've tried to configure the internal DHCP on a dynamic-interface, but this is not possible:(Cisco Controller) >config interface dhcp dynamic-interface vlan401 primary 172.16.x.3 vlan401 Interface IP can not be used as internal DHCP server IP It works, if I use another IP (aka DHCP server) in the same subnet or in another subnet. It works also for the management interface.
(Cisco Controller) >show interface detailed management
Interface Name................................... management
MAC Address...................................... d0:c2:82:xx:xx:xx
IP Address....................................... 10.2.x.135
IP Netmask....................................... 255.255.255.240
IP Gateway....................................... 10.2.x.129
[code].....
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May 29, 2012
Is it possible to assign IP addresses to remote site WIFI users from local DHCP server and forward all other traffic to 2504 WLC?
[WIFI Users] >--------<AP (DHCP server) >------ VPN ---------< WLC
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Jan 6, 2013
We have 3 internet links from different providers connected to configured WAN 1,2,3 in RV016. A remote client needs to connect to a internal VPN Server behind RV016, so we use one-to-one NAT to publish the internal server ip to a Valid IP from WAN3 and setup protocol binding in Multi wan to all trafic (TCP and UDP) from the internal VPN address exits with WAN3.
So, the remote client tries to connect to VPN using this ip Address from WAN3 and sometimes work and sometimes not. It's clear to us that the problem lies in the response from RV016 not coming always from WAN3, because if we disconnect the two other links (WAN1 and 2) Its works flawless.
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Jan 24, 2013
I seem to be having a problem with DNS name resolution after configuring my router (Cisco 3725 running IOS image: c3725-adventerprisek9-mz.124-25.bin) for handling DHCP requests.
Before I made the change, everything was working correctly; I could ping Google.com from a computer inside my LAN and would get response from one of Google's public IP's like normal.
I had a separate DHCP/DNS server running Windows Server 2008 handling the DHCP request and DNS queries.
When I made the change, I turned off the DHCP/DNS server and issued the following DHCP commands to my router:
Code...
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Aug 25, 2012
i have configured wlc 2504 .in that i have configured two interfaces.one is guest, 2nd is internal user, the pblm when user try to connect with that contain ssid user not getting ip address,
i have connected only one link between core to wlc on port 1.for guest interface i used port 4.but no physical link.
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Aug 8, 2012
My problem, in a nutshell, is that clients do not get an IP from an external DHCP server when connected to a guest VLAN.
My current setup is:
Native VLAN 1 (192.168.2.x)
2008 DHCP Servers
2504 WLC
[Code].....
The guest WLAN just uses WPA and a PSK and is set to interface vlan101 There rest of the 2504 config is default.
The ports that the WLC and APs are connected to are tagged on the correct VLANs. (is that even necessary for the AP now?)
Ive changed the interface config around a hundred times now with no luck. No matter what a client will not get an IP.
Could this be due to the 2504 and ASA both acting as DHCP relays? Ive tried setting the IP of the DHCP on the dynamic interface to many different things with no luck.
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Jan 7, 2013
I have a Cisco Wlan Controller 2504 with 1042N AP (3-nos) every thing was working fine from past 2 months. Now i am getting a issue with clients which are connected to the wireless AP, they are not able to get an dhcp IP address from the 2960 Switch (DHCP Server). The clients are getting IP address as 0.0.0.0. [code]
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Apr 17, 2013
I am looking to enable the internal DHCP on my WLC. I have enabled it and it seems to be operating correctly but I think my routing and or settings allowing me to access anything beyond the private network is wrong.
DHCP is handing out correct IP info and DNS info.How do I route the new private network (10.1.9.*) out to our existing 10.1.4.1. (management IP is 10.1.4.253) Can this be done within the WLC ?
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Nov 7, 2012
All controllers are in version 7.2.111.3.C1 is a 5508, it is ou anchor controller.C2 is a 5508, it is a big site controller.C3 is a 2504, it is a small site controller. C2 and C3 are in the same mobility group than C1 (and all is up up in mobilty managment). When "DHCP Addr. Assignment" is enable on C1 : Clients on C2 received their IP address by our external DHCP server via C1 and the guest tunneling betwenn C1 and C2 and all is working fine. Clients on C3 don't received their IP address by our external DHCP server via C1 and the guest tunneling betwenn C1 and C3, so nothing work.
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Apr 17, 2013
I am looking to enable the internal DHCP on my WLC. I have enabled it and it seems to be operating correctly but I think my routing and or settings allowing me to access anything beyond the private network is wrong.
DHCP is handing out correct IP info and DNS info. How do I route the new private network (10.1.9.*) out to our existing 10.1.4.1. (management IP is 10.1.4.253) Can this be done within the WLC ?
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Aug 22, 2011
The two controllers are having two internal DHCP servers with the same range in LAN (enx1,enx2). but i have specified which is primary DHCP server(enx3) in WLAN interface.
Now if a new user added into network, will he get IP address from primary dhcp(WLC) or AP connected WLC.
if two users connected to 2 diff AP's which are connected to 2 WLC will get the same IP address? since having same address pool configured.
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Apr 2, 2013
I have just setup a new WLC 2504 controller to manage a WiFi service that will span 6 geographic locations. The local networks at each location are on different subnets (all 192.168.x.x) and are linked up via IPSEC VPN links, and there is Active Directory spanning the sites, with DNS and DHCP servers running at each location.
I tested the WLC at our main office with a single AP, and it worked fine. The AP set itself up, and wireless devices connect with no probs. Great! Yesterday I headed out to one of our remote sites, and connected an AP to their network - and that seemed to work fine too. Within a few minutes I was able to see the WiFi network I'd setup, and my smartphone connected to it straight away (as I'd rpeviously connected at the main office), so I was pretty happy that all was working well.
This morning however I've had notification that wifi performance at the remote site isn't great. I've got someone to check their ip address, and I've found that their IP address and default gateway match the LAN at the main office where the WLC is based - NOT the LAN where the wireless client is. Obvioulsy this is not ideal!
(I guess I HAVE done something wrong!?). And how can I get wireless clients at remote sites to pick up an IP from the DHCP server at THEIR site?
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Jun 28, 2012
We created the management interface, an internal DHCP scope in same subnet, and Two SSID tied to the same management interface:
- when we connect to the first SSID we have and IP address
- but when we connect to the secone SSID: impossible to get an ip address - auth and association are OK
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Feb 24, 2013
I have a cisco wlan controller (2100) running software 7.0.235.0. I have the internal private wlan running off of port 1 and that is working fine with an internal dhcp server.Is it possible to setup another ssid (guest) and have the interface directly linked to a static ip on the WAN and also use the built in cisco internal dhcp server?
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Nov 20, 2012
I have a 2504 WLC with 3 1262 WAPs in lightweight mode.
Clients connect using WPA2 PSK AES with no problem. Clients are Windows XP Home SP3. Test pages end up in print queue and eventually get a error printing status. Clients are not part of a domain and in a standalone workgroup - techstream.
Printer can be pinged from wireless client.
Another 1262N WAP in standalone mode connected to same lan from windows 7 sp1 clients have no problem printing to a local printer.
What does work on the Windows XP Home client is connecting to a network shared printer authenticating with domain admin id and password and it works. Reboot and the network shared printer can not connect multiple reasons are "access is denied" and message box says "only security tab will be displayed....." Another Windows XP Home SP3 client on reboot can't open the network shared printer with message "Can't find printer"
The local printers do work on these pc's with an old colubris router that has an outside interface on our lan and internal network with clients getting dhcp address from colubris router of 192.168.3.XXX .
What is wrong with the wireless 2504 WLC?
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Mar 17, 2013
CAP3501 + Cisco 2504 controller, not working MESH? So it should be, or what I am doing is not correct.
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Jul 12, 2012
I want to know if its nessary to install Certificate authority on your radius server. If we have a CA server already in the domain can we use that for this purpose or we have to install certificate authority on our DC.
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Apr 15, 2013
I have a customer who has 2 NCS servers; 1 residing at their corporate site and the other residing at their local site. They have a WLC2504 controller at the local site. They would like to connect both ncs servers to to the local WLC. Is it possible to connect 2 ncs servers to a single controller? Can WLC configuration databases on two different NCSs be the same? How can you prevent 1 NCS from overwritting the other?
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Nov 18, 2011
I'm running an exchange server beings my 2800 router and its all working well i have setup NAT and OWA is working well when external and on the internet but when the phones are on the internal wireless OWA isn't working and if u telnet the external ip on that forwarded port it doesn't forward i believe this is the fact the port forward rule "ip nat inside source static tcp 10.0.100.7 443 interface Dialer0 443" is for the dialer interface only and as I'm internal nothing but I'm show to forward any request on that port.. ill include the config below
!!no logging buffered!aaa new-model!!aaa authentication ppp default local!!!!!aaa session-id common!clock timezone WST 8 0clock calendar-valid!dot11 syslogip source-route!!ip cef!ip dhcp excluded-address 10.0.200.1 [code]......
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Sep 20, 2012
My Internal Wireless adapter not working each time boot up I am using Windows 7.
I have to diagnose each time and click fix for it to enable the internet to be on. Why is it disconnecting me from connecting to the internet all the time upon startup ?
Here are the details-
Diagnostics Information (Network Adapter)
Details about network adapter diagnosis:
Network adapter Wireless Network Connection driver information:
[Code].....
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Nov 29, 2011
I have been trying to create a Guest WLan on my 4402 WLC system and have found several confilcting documents explaining the procedure. During this process I have notices that although the current corp wireless works, there was never a virtual interface created for it. Instead it uses the same Wlan/Vlan as the ap manager and managemnt interfaces. Could this by why I cant seem to get the Guest access working? or is this not a problem after all since the wireless does work.
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Sep 27, 2012
I recently installed 2 wlc 5508 with the latest software 7.3.101.0. I am not able to activate the Internal DHPC Server. The following message appears: "Error in setting dhcp scop leasetime".
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Jun 13, 2012
DHCP conflict on 881-W with the internal AP?I have (12) 881-W chassis in the field. They are running DHCP services to the wired users as well as to the internal AP for reachability / management / etc. The scope for the internal AP is a /30 so only one address is in the scope and it is intended for the internal AP. This serves a a point to point link between the internal AP and the internal Router inside the 881-W chassis.
Somehow the 881-W DHCP server is getting out of synch and a conflict is occurring. It seems at some point, either at boot-up or lease expiration/renewal, the DHCP server is performing a ping to verify that the address is not in use. The AP has this address assigned prior and replies to the ping causing a conflict. I noticed an AP down today, checked the 881-W uptime and the conflict correlates to the same time. I have to manually clear the conflict and everything works as it should.The existing 12 881-w's could grow to 100's over time, so the manual intervention of clearing the conflict is not going to scale. I really want to stay away from static reservations.
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Dec 14, 2009
I just bought a Linksys 320N router to replace another competitors router. I am trying to connect to my VPN server from outside my network. I have the external ip to my network. I setup the new 320N router just like the old router. set dmz ip to internal ip of vpn server, set port forwarding to 1723, both, internal ip of vpn server, I have a way to test the vpn while i am inside my network. So, I can watch the VPN server log and see the request come into the server and it times out with the Linksys 320 N hooked up. If I have the old router hooked up, the vpn establishes a connection.
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Oct 30, 2012
Ok, so with my WLC2504 implementation, I use the 4 ports to physically segment my wireless networks. Here is my setup:
Port 1 (Management) - Internal IP so I can manage the WLC from our internal network (Untagged)
Port 2 - Connected to our core stack and tagged with VLAN 14
Port 1 and 2 are both connected to the same core stack
Port 3 - Connected to a RV016 Linksys which is connected to our fiber connection to the outside (Untagged) - External connection for laptops
Port 4 - Connected to a Linksys wireless router (with wireless disabled) (Untagged) - External connection for smartphones
The TAC engineer I talked to just told me that I can only have one untagged interface on the WLC. If they are physically connected to different switches, thus physically segmenting the network, should it matter?
The wireless works just fine. What I am having issues with is getting a client that is hard-wire connected to the RV016 to get a DHCP address from the WLC.
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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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