WLC an DHCP

Hi,
I am wondering if the folowing is a valid configuration:
WLC: 5508
software: 7.3.101
I have a subnet (VLAN130) for management interface and I have 2 SSID/VLAN, 1 for corporate devices (VLAN160) and  1 for guest(VLAN20).
Corp devices gets IP from an Windows DHCP. It is working as well.
Smartphones/guest is geting IP from the WLC. It is working as well too. But I need to change it.
I am deploying a WLC 5508-HA and when the feature HA is enable, the WLC does not support the DHCP server feature anymore.
Is there a way for the user from guest vlan to get an IP Address, doing the request for my windows server on corporate vlan through the management interface?
Regards,
Murilo

Steve
In the past, it didn´t work.  My customer had a Proventia Firewall, and when we tried, it didn´t work. He said me that the firewall was receiving the requests through "guest interface", then we let the DHCP on the WLC.
When we tried to do it, we were using the software version 7.0.98. I have faced and I am still facing so many bugs on Wireless Lan Controller , maybe this was another one.
Right now, the firewall is a ASA 5525 and the WLC software version is 7.3.101. We tried to move the DHCP to new ASA firewall, but we found a limitation too. The ASA supports a maximum of 256 DHCP address.
I received a Service request to solve this big issue, because on HA deployment was found this limitation on WLC.
If I move on with the deploy, then it should work fine, doesn´t it?  The DHCP messages requests and answers goes through the management interface, are you sure about this?
thanks and best regards,
Murilo

Similar Messages

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    Hello
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    HI Chris,
    First enable DHCP Proxy on WLC.
    (Cisco Controller) >config dhcp proxy enable
    and make sure that For DHCP proxy to work, a primary DHCP server must be configured on each controller interface that requires DHCP services.
    To kow more about DHCO on WLC:
    http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/110865-dhcp-wlc.html#Internal-DHCP
    Regards
    Dont forget to rate helpful posts

  • WLC as DHCP server problems

    Hi
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    service-port                               N/A       N/A      10.215.29.165   Static         No           No  
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    t2-1f                                        LAG       609       10.215.68.253   Dynamic    No            No

  • 5500 Series WLC internal DHCP Server - Exclusion?

    Hi there,
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    However on one WLAN we ran out of addresses so changed the subnet from a /25 to a /24.
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    Mike,
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    Apparently, others have observed similar DHCP behavior.
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    http://forums.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Wireless%20-%20Mobility&topic=General&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1ddc63fc

  • 2500 WLC Primary DHCP Server

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    Sent from Cisco Technical Support iPad App

    Hello Stuart,
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    http://www.cisco.com/en/US/products/ps6366/products_tech_note09186a0080af5d13.shtml
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    No. 
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    Hello,
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    Hello again,
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  • WLC 5508 Internal DHCP server issues

    Hi,
    I am hoping to get your feedback around the dhcp issues I am facing with Two Centrally Switched Wireless LANs. I have tried to explain the setup and the problems below and would appreciate it if anyone can suggest a solution for the problems I am facing:
    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 Vlan 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.................................. 7.0.116.0
    Bootloader Version............................... 1.0.1
    Field Recovery Image Version..................... 6.0.182.0
    Firmware Version................................. FPGA 1.3, Env 1.6, USB console 1.27
    Build Type....................................... DATA + WPS + LDPE
    (Cisco Controller) >show interface summary
    Interface Name                   Port Vlan Id  IP Address         Type        Ap Mgr        Gu                                                                            
    est
    guest                                        1    301      10.255.255.30    Dynamic   No              No                                                                            
    management                          1    100      172.17.1.30        Static          Yes            No                                                          
    service-port                              N/A  N/A      192.168.0.1       Static         No               No                                                                            
    virtual                                        N/A   N/A      10.0.0.1              Static         No               No                                                                            
    (Cisco Controller) >show wlan summary
    Number of WLANs.................................. 4
    WLAN ID  WLAN Profile Name / SSID               Status    Interface Name
    1        LAN                                    Enabled   management
    2        Internet                               Enabled   management
    3        Managment Assets          Enabled   management
    4        Guest                                  Enabled   guest
    (Cisco Controller) >show dhcp detailed guest
    Scope: guest
    Enabled.......................................... Yes
    Lease Time....................................... 86400 (1 day )
    Pool Start....................................... 10.255.255.31
    Pool End......................................... 10.255.255.254
    Network.......................................... 10.255.255.0
    Netmask.......................................... 255.255.255.0
    Default Routers.................................. 10.255.255.1  0.0.0.0  0.0.0.0
    DNS Domain.......................................
    DNS.............................................. 8.8.8.8  8.8.4.4  0.0.0.0
    Netbios Name Servers............................. 0.0.0.0  0.0.0.0  0.0.0.0
    (Cisco Controller) >show interface detailed management
    Interface Name................................... management
    MAC Address...................................... e8:b7:48:9b:84:20
    IP Address....................................... 172.17.1.30
    IP Netmask....................................... 255.255.255.0
    IP Gateway....................................... 172.17.1.1
    External NAT IP State............................ Disabled
    External NAT IP Address.......................... 0.0.0.0
    VLAN............................................. 100
    Quarantine-vlan.................................. 0
    Active Physical Port............................. 1
    Primary Physical Port............................ 1
    Backup Physical Port............................. Unconfigured
    Primary DHCP Server.............................. 172.30.50.1
    Secondary DHCP Server............................ Unconfigured
    DHCP Option 82................................... Disabled
    ACL.............................................. Unconfigured
    AP Manager....................................... Yes
    Guest Interface.................................. No
    L2 Multicast..................................... Enabled
    (Cisco Controller) >show interface detailed guest
    Interface Name................................... guest
    MAC Address...................................... e8:b7:48:9b:84:24
    IP Address....................................... 10.255.255.30
    IP Netmask....................................... 255.255.255.0
    IP Gateway....................................... 10.255.255.1
    External NAT IP State............................ Disabled
    External NAT IP Address.......................... 0.0.0.0
    VLAN............................................. 301
    Quarantine-vlan.................................. 0
    Active Physical Port............................. 1
    Primary Physical Port............................ 1
    Backup Physical Port............................. Unconfigured
    Primary DHCP Server.............................. Unconfigured
    Secondary DHCP Server............................ Unconfigured
    DHCP Option 82................................... Disabled
    ACL.............................................. Unconfigured
    AP Manager....................................... No
    Guest Interface.................................. No
    L2 Multicast..................................... Enabled
    (Cisco Controller) >show dhcp leases
           MAC                IP         Lease Time Remaining
    00:21:6a:9c:03:04    10.255.255.46    23 hours 52 minutes 42 seconds        <<<<<<< lease remains even when the client is disconnected.
    *********Example of Client connected to the right Vlan with an ip address from the incorrect interface. *************
    (Cisco Controller) >show client detail 00:21:6a:9c:03:04
    Client MAC Address............................... 00:21:6a:9c:03:04
    Client Username ................................. N/A
    AP MAC Address................................... a0:cf:5b:00:49:c0
    AP Name.......................................... mel
    Client State..................................... Associated
    Client NAC OOB State............................. Access
    Wireless LAN Id.................................. 2                 <<<<<<<<   'Internet' SSID
    BSSID............................................ a0:cf:5b:00:49:ce
    Connected For ................................... 319 secs
    Channel.......................................... 36
    IP Address....................................... 10.255.255.46      <<<<<<< IP address assigned from the 'Guest' Interface or dhcp scope on the WLC
    Association Id................................... 1
    Authentication Algorithm......................... Open System
    Reason Code...................................... 1
    Status Code...................................... 0
    Session Timeout.................................. 1800
    Client CCX version............................... 4
    Client E2E version............................... 1
    QoS Level........................................ Silver
    802.1P Priority Tag.............................. disabled
    WMM Support...................................... Enabled
    Power Save....................................... OFF
    Mobility State................................... Local
    Mobility Move Count.............................. 0
    Security Policy Completed........................ Yes
    Policy Manager State............................. RUN
    Policy Manager Rule Created...................... Yes
    ACL Name......................................... none
    ACL Applied Status............................... Unavailable
    Policy Type...................................... N/A
    Encryption Cipher................................ None
    Management Frame Protection...................... No
    EAP Type......................................... Unknown
    H-REAP Data Switching............................ Central       <<<<<<<<<
    H-REAP Authentication............................ Central       <<<<<<<<<<
    Interface........................................ management
    VLAN............................................. 100           <<<<<<<<<<< right Vlan
    Quarantine VLAN.................................. 0
    Access VLAN...................................... 100

    Hi All,
    I have a similar issue where Wireless clients are not receiving automatic addressing from an internal DHCP server. I have multiple interfaces configured on the WLC which are connected to separate VLANS. The manually specified DHCP primary server entry is the same on all interfaces. Some clients are able to authenticate and receive automatic IP configuration but some clients are failing the address assignment process. I have checked connectivity between the WLC and DHCP server, this is confirmed as working. When I carry out a "debug dhcp packet enable", I get the following outputs which seems as if the DHCP discover request from the client is skipped. Your thoughts and inputs on this are appreciated.
    DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option len (including the magic cookie) 76
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option: message type = DHCP DISCOVER
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option: 116 (len 1) - skipping
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option: 61 (len 7) - skipping
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option: requested ip = 169.254.223.5
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option: 12 (len 13) - skipping
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option: vendor class id = MSFT 5.0 (len 8)
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option: 55 (len 11) - skipping
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option: 43 (len 2) - skipping
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP options end, len 76, actual 68
    *DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP Forwarding DHCP packet (332 octets) packet DHCP Socket Task: Nov 07 11:16:09.174: 00:22:fb:7b:37:32 DHCP option len (including the magic cookie) 76
    Thanks,
    Raj Sandhu

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    Hi,
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    But, our issue was an error on the DHCP. The DHCP server pool for the APs was configured with lease time infinite (on a Cisco 6500). After capturing the packets and debugging on the AP we realized that the AP were receiving wrong values:
    DHCP: Scan: Renewal time: 2147483647
    DHCP: Scan: Rebind time: 536870911
    So, on the AP debugging we saw:
    DHCP: Scan: Renewal time larger than Rebind time
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  • Internal DHCP scope for AP on WLC 7.0 (on diff subnet)

    hi All,
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  • WLC 2006 INTERNAL DHCP FOR GUESTS CLIENTS

    I would like to use the internal DHCP to issue ipaddress to the guest wireless clients.
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    Dhcp Scope Info
    Scope: Guest.Data.DHCP
    Enabled.......................................... Yes
    Lease Time....................................... 86400 (1 day )
    Pool Start....................................... 192.168.255.17
    Pool End......................................... 192.168.255.30
    Network.......................................... 192.168.255.0
    Netmask.......................................... 255.255.255.0
    Default Routers.................................. 192.168.255.2 0.0.0.0 0.0.0.0
    DNS Domain.......................................
    DNS.............................................. 0.0.0.0 0.0.0.0 0.0.0.0
    Netbios Name Servers............................. 0.0.0.0 0.0.0.0 0.0.0.0
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    WLAN Identifier.................................. 2
    Network Name (SSID).............................. Guest.Data
    Status........................................... Disabled
    MAC Filtering.................................... Disabled
    Broadcast SSID................................... Enabled
    AAA Policy Override.............................. Disabled
    Number of Active Clients......................... 0
    Exclusionlist Timeout............................ 60 seconds
    Session Timeout.................................. Infinity
    Interface........................................ guest.data
    WLAN ACL......................................... unconfigured
    DHCP Server...................................... Default
    DHCP Address Assignment Required................. Enabled
    Quality of Service............................... Silver (best effort)
    WMM.............................................. Disabled
    CCX - AironetIe Support.......................... Enabled
    CCX - Gratuitous ProbeResponse (GPR)............. Disabled
    Dot11-Phone Mode (7920).......................... Disabled
    Wired Protocol................................... None
    IPv6 Support..................................... Disabled
    --More-- or (q)uit
    Radio Policy..................................... All
    Security
    802.11 Authentication:........................ Open System
    Static WEP Keys............................... Disabled
    802.1X........................................ Disabled
    Wi-Fi Protected Access (WPA/WPA2)............. Disabled
    CKIP ......................................... Disabled
    IP Security Passthru.......................... Disabled
    Web Based Authentication...................... Disabled
    Web-Passthrough............................... Disabled
    Auto Anchor................................... Disabled
    H-REAP Local Switching........................ Disabled
    Management Frame Protection................... E

    when i try to assocate the dhcp scope to wireless.guest.data interface using 192.168.255.1 which is the ip of the that interface it will not let me. I would have thought since i was using the interal dhcp that the .1 address would be the dhcp scope address also. i can assign 192.168.255.0 or 192.168.255.2(gateway)if i use .0 or .2 the dhcp request (discovery) process starts and then will forward to .2 (gateway) and never assign an address. the only thing that happens is that the client wireless interface will get 255.255.255.255 for a few seconds then go away.
    what i am trying to accomplish is to connect the wlc port 2 directly to a pix 506 which goes to the internet so the guest traffice is not on our vlan.
    any other suggestions on guest vlans would be appricated....
    Tom
    Interface Name................................... wireless.guest.data
    IP Address....................................... 192.168.255.1
    IP Netmask....................................... 255.255.255.0
    IP Gateway....................................... 192.168.255.2
    VLAN............................................. 150
    Quarantine-vlan.................................. no
    Physical Port.................................... 2
    Primary DHCP Server.............................. Unconfigured
    Secondary DHCP Server............................ Unconfigured
    DHCP Option 82................................... Disabled
    ACL.............................................. Unconfigured
    AP Manager....................................... No
    Scope: wireless.guest.data.dhcp.server
    Enabled.......................................... Yes
    Lease Time....................................... 86400 (1 day )
    Pool Start....................................... 192.168.255.17
    Pool End......................................... 192.168.255.30
    Network.......................................... 192.168.255.0
    Netmask.......................................... 255.255.255.0
    Default Routers.................................. 192.168.255.2 0.0.0.0 0.0.0.0
    DNS Domain.......................................
    DNS.............................................. 0.0.0.0 0.0.0.0 0.0.0.0
    Netbios Name Servers............................. 0.0.0.0 0.0.0.0 0.0.0.0

  • WLC "DHCP Option 82 Remote Id field format"

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  • WLC 2100 and DHCP strange issue.

    Hi,
       i have this scenario: 1 WLC 2100 and two LW AP 3500 connected. If the access points are connected via external switch evrything works well - AP and Clients get IP address from external DHCP and this is ok but when im connecting AP 3500 directly to one of ports on WLC i need to chceck in controller web Controller -> Advanced -> DHCP -> Enable DHCP proxy - after that AP get IP addres and clients get too but ip is assigned from external dhcp but the gateway is set as controller IP address (!!!) so clients not works. I want to configure access points connected directly do WLC.
    I have small setup and i have configured all in the one vlan - management dla users are in the same vlan.
    And the second is - for what usage is internal DHCP server - and how to use it?

    When "Enable DHCP Proxy" is not enabled tha LW AP 3500 cannot get IP address if it is connected directly to LWC... when i add this option then on both LW AP 3500 - one connected to WLC and second directly to switch give me DHCP address from external DHCP but gateway sets as LWC management IP.
    I made test - connected client witout "Enable DHCP Proxy":
    Client IP 192.168.1.201 (correct in dhcp server logs), default GW 192.168.1.1 (correct gateway for this DHCP) correct dnses and in windws ipconfig i see "Server DHCP 192.168.1.1" all is correct.
    Disconnected client and clicked "Enable DHCP Proxy":
    Client IP 192.168.1.201 (correct in dhcp server logs), default GW  192.168.1.252 incorrect gateway - ip of WLC management interface) correct dnses and in windws  ipconfig i see "Server DHCP 1.1.1.1" that shows that WLC modified DHCP packets... but what it try to set default GW as WLC?
    WLC data:
    Software Version
    7.0.98.0
    I can attach screenshots and any other configutation if you need.

  • WLC DHCP Proxy - To Do or Not to Do?

    What is the upside/downside of turning of the WLC's DHCP Proxy setting?  I know the option is there now, but it still defaults to proxy mode, so whats the issues?  I ask, because, I could make a current issue of a guest wlan getting to a dhcp server a lot easier, if the client requests it. I can then dhcp relay off of a pix and to my enterprise dhcp/dns server. But I'm concerned what effect this may have on my other wlans.

    Dhcp proxy is required if the WLC is the dhcp server, if you disable this remember to add the ip-helper address to your L3 interfaces.
    That part of the config is a holdover from the Airespace days that helped the WLC learn the ip access of the clients. This has been fixed updated in later releases of code. So to proxy or not to proxy is really up to if the WLC is the dhcp or not. Unless yopu are running 6.0.196.0 or 7.0.980. Where you could hit CSCth68708
    Sent from Cisco Technical Support iPad App

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