Laptops do not receive DHCP IP address?
Hi All,
Iam using 4402-Controller and 1252 Access Points. The AP's are registered on the Controller and get an ip address but the laptops are not getting an ip address. The FWSM on the Core switch is configured as DHCP server with IP of 192.168.5.1. The 4402 WLC Mgmt-Interface also has the gateway of 192.168.5.1. The Mgmt-Interface IP is 192.168.5.5/24.
The AP-manager Interface IP is 192.168.5.6/24 with gateway of 192.168.5.1.
The FWSM debug messages says that the DHCP request has been discarded from the DHCP Relay Agent of WLC.
Has anyone come across this issue before?
Provide some suggestions to overcome this issue?
Here is a link that explains the issue you are having.
http://supportwiki.cisco.com/ViewWiki/index.php/How_to_configure_WLC_as_a_DHCP_relay_server
or you can try this command to see if it helps:
config dhcp proxy disable
Similar Messages
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Clients not receiving DHCP IP address from HREAP centrally Switched Guest SSID
Hi All,
I am facing a problem in a newly deployed branch site where the Clients are not receiving DHCP IP address from a centrally switched Guest SSID. I see the client status is associated but the policy manager state is in DHCP_REQD.
The dhcp pool is configured on the controller itself. The local guest clients are able to get DHCP and all works fine, the issue is only with the clients in the remote site. The Hreap APs are in connected mode. Could you please suggest what could be the problem. Below is the out of the debug client.
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 Adding mobile on LWAPP AP 3c:ce:73:6d:37:00(1)
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 Reassociation received from mobile on AP 3c:ce:73:6d:37:00
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 0.0.0.0 START (0) Changing ACL 'Guest-ACL' (ACL ID 0) ===> 'none' (ACL ID 255) --- (caller apf_policy.c:1393)
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 Applying site-specific IPv6 override for station 10:40:f3:91:7e:24 - vapId 17, site 'APG-MONZA', interface 'vlan_81'
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 0.0.0.0 START (0) Changing ACL 'none' (ACL ID 255) ===> 'none' (ACL ID 255) --- (caller apf_policy.c:1393)
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 Applying IPv6 Interface Policy for station 10:40:f3:91:7e:24 - vlan 81, interface id 13, interface 'vlan_81'
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 Applying site-specific override for station 10:40:f3:91:7e:24 - vapId 17, site 'APG-MONZA', interface 'vlan_81'
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 0.0.0.0 START (0) Changing ACL 'none' (ACL ID 255) ===> 'none' (ACL ID 255) --- (caller apf_policy.c:1393)
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 STA - rates (8): 140 18 152 36 176 72 96 108 0 0 0 0 0 0 0 0
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 0.0.0.0 START (0) Initializing policy
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 0.0.0.0 START (0) Change state to AUTHCHECK (2) last state AUTHCHECK (2)
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 0.0.0.0 AUTHCHECK (2) Change state to L2AUTHCOMPLETE (4) last state L2AUTHCOMPLETE (4)
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 0.0.0.0 L2AUTHCOMPLETE (4) Plumbed mobile LWAPP rule on AP 3c:ce:73:6d:37:00 vapId 17 apVapId 1
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 0.0.0.0 L2AUTHCOMPLETE (4) Change state to DHCP_REQD (7) last state DHCP_REQD (7)
*apfMsConnTask_3: May 24 13:26:49.372: 10:40:f3:91:7e:24 apfMsAssoStateInc
*apfMsConnTask_3: May 24 13:26:49.373: 10:40:f3:91:7e:24 apfPemAddUser2 (apf_policy.c:222) Changing state for mobile 10:40:f3:91:7e:24 on AP 3c:ce:73:6d:37:00 from Idle to Associated
*apfMsConnTask_3: May 24 13:26:49.373: 10:40:f3:91:7e:24 Scheduling deletion of Mobile Station: (callerId: 49) in 28800 seconds
*apfMsConnTask_3: May 24 13:26:49.373: 10:40:f3:91:7e:24 Sending Assoc Response to station on BSSID 3c:ce:73:6d:37:00 (status 0) ApVapId 1 Slot 1
*apfMsConnTask_3: May 24 13:26:49.373: 10:40:f3:91:7e:24 apfProcessAssocReq (apf_80211.c:4672) Changing state for mobile 10:40:f3:91:7e:24 on AP 3c:ce:73:6d:37:00 from Associated to Associated
*apfReceiveTask: May 24 13:26:49.373: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) State Update from Mobility-Incomplete to Mobility-Complete, mobility role=Local, client state=APF_MS_STATE_ASSOCIATED
*apfReceiveTask: May 24 13:26:49.373: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) pemAdvanceState2 4183, Adding TMP rule
*apfReceiveTask: May 24 11:35:53.373: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) Adding Fast Path rule
type = Airespace AP - Learn IP address
on AP 3c:ce:73:6d:37:00, slot 1, interface = 13, QOS = 3
ACL Id = 255, Jumbo F
*apfReceiveTask: May 24 13:26:49.373: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) Fast Path rule (contd...) 802.1P = 0, DSCP = 0, TokenID = 7006 IPv6 Vlan = 81, IPv6 intf id = 13
*apfReceiveTask: May 24 13:26:49.373: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) Successfully plumbed mobile rule (ACL ID 255)
*pemReceiveTask: May 24 13:26:49.373: 10:40:f3:91:7e:24 0.0.0.0 Added NPU entry of type 9, dtlFlags 0x0
*pemReceiveTask: May 24 13:26:49.373: 10:40:f3:91:7e:24 Sent an XID frame
*apfMsConnTask_3: May 24 13:26:49.401: 10:40:f3:91:7e:24 Updating AID for REAP AP Client 3c:ce:73:6d:37:00 - AID ===> 1
*apfReceiveTask: May 24 13:28:49.315: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) DHCP Policy timeout
*apfReceiveTask: May 24 13:28:49.315: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) Pem timed out, Try to delete client in 10 secs.
*apfReceiveTask: May 24 13:28:49.315: 10:40:f3:91:7e:24 Scheduling deletion of Mobile Station: (callerId: 12) in 10 seconds
*osapiBsnTimer: May 24 13:28:59.315: 10:40:f3:91:7e:24 apfMsExpireCallback (apf_ms.c:599) Expiring Mobile!
*apfReceiveTask: May 24 13:28:59.315: 10:40:f3:91:7e:24 apfMsExpireMobileStation (apf_ms.c:4897) Changing state for mobile 10:40:f3:91:7e:24 on AP 3c:ce:73:6d:37:00 from Associated to Disassociated
*apfReceiveTask: May 24 13:28:59.315: 10:40:f3:91:7e:24 Scheduling deletion of Mobile Station: (callerId: 45) in 10 seconds
*osapiBsnTimer: May 24 13:29:09.315: 10:40:f3:91:7e:24 apfMsExpireCallback (apf_ms.c:599) Expiring Mobile!
*apfReceiveTask: May 24 13:29:09.316: 10:40:f3:91:7e:24 Sent Deauthenticate to mobile on BSSID 3c:ce:73:6d:37:00 slot 1(caller apf_ms.c:4981)
*apfReceiveTask: May 24 13:29:09.316: 10:40:f3:91:7e:24 apfMsAssoStateDec
*apfReceiveTask: May 24 13:29:09.316: 10:40:f3:91:7e:24 apfMsExpireMobileStation (apf_ms.c:5018) Changing state for mobile 10:40:f3:91:7e:24 on AP 3c:ce:73:6d:37:00 from Disassociated to Idle
*apfReceiveTask: May 24 13:29:09.316: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) Deleted mobile LWAPP rule on AP [3c:ce:73:6d:37:00]
*apfReceiveTask: May 24 13:29:09.316: 10:40:f3:91:7e:24 Deleting mobile on AP 3c:ce:73:6d:37:00(1)
*pemReceiveTask: May 24 13:29:09.317: 10:40:f3:91:7e:24 0.0.0.0 Removed NPU entry.#does the client at the remote site roams between AP that connects to different WLC?
#type 9 is not good.
*pemReceiveTask: May 24 13:26:49.373: 10:40:f3:91:7e:24 0.0.0.0 Added NPU entry of type 9, dtlFlags 0x0
#Does your dhcp server getting hits.
#Also, get debug dhcp message & packet.
#Dhcp server is not responding.
*apfReceiveTask: May 24 13:28:49.315: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) DHCP Policy timeout
*apfReceiveTask: May 24 13:28:49.315: 10:40:f3:91:7e:24 0.0.0.0 DHCP_REQD (7) Pem timed out, Try to delete client in 10 secs. -
Station is not receiving an IP address from DHCP
Hello guys,
I have an ASA 5505 functioning as a router to connect to the Internet. Also, it is my DHCP server for my clients, and APs. When I connect my laptop to the ASA, I get an IP address and able to configure my WLC. The APs also receives an IP address from the ASA. However, when I connect to the AP wirelessly as a wireless client, my laptop is not receiving an IP address from the DHCP which is my ASA.
Here is my topology:
[3602i]--------[ASA5505]--------[WLC2504]
Here is my ASA config for my clients:
interface Vlan12
description *** DEFAULT GATEWAY FOR Wi-Fi GUESTS
nameif GUESTS-if
security-level 100
ip address 10.2.12.1 255.255.255.0
dhcpd address 10.2.12.100-10.2.12.131 GUESTS-if
dhcpd dns 208.67.222.222 208.67.220.220 interface GUESTS-if
dhcpd lease 1048575 interface GUESTS-if
dhcpd option 3 ip 10.2.12.1 interface GUESTS-if
dhcpd enable GUESTS-if
Here is the WLC interface config:Hello jsnyder81,
I have another question. This is still related to the same network.
I am able to connect to the wireless network now, and receiving IP address from the ASA 5505; however, I can only ping my wireless gateway. I also don't have access to the Internet.
When I hard wired my laptop to the ASA's switch port, I am able to browse the Internet, but not via WiFi.
Here is the routing table that I have on the ASA:
Gateway of last resort is 192.168.1.1 to network 0.0.0.0
C 10.2.8.0 255.255.255.0 is directly connected, PRINTERS-if
C 10.2.9.0 255.255.255.0 is directly connected, FIOS-if
C 10.2.10.0 255.255.255.0 is directly connected, IP-CAMERAS-if
C 10.2.11.0 255.255.255.0 is directly connected, WiFi-USERS-if
C 10.2.12.0 255.255.255.0 is directly connected, GUESTS-if
C 10.2.13.0 255.255.255.0 is directly connected, WIRED-if
C 10.2.3.0 255.255.255.0 is directly connected, EXSi-if
C 10.2.4.0 255.255.255.0 is directly connected, AD/NPS/CA-if
C 10.2.5.0 255.255.255.0 is directly connected, inside
C 10.2.6.0 255.255.255.0 is directly connected, WLC-if
C 10.2.7.0 255.255.255.0 is directly connected, AP-if
C 10.2.20.0 255.255.255.0 is directly connected, WIRELESS-PILOT-if
C 10.2.21.0 255.255.255.0 is directly connected, WIRED-PILOT-if
C 10.2.22.0 255.255.255.0 is directly connected, SERVERS-PILOT-if
C 192.168.1.0 255.255.255.0 is directly connected, outside
d* 0.0.0.0 0.0.0.0 [1/0] via 192.168.1.1, outside
I also have this command:
same-security-traffic permit inter-interface -
Airport extreme not receiving an ip address
Hey i was wondering if anyone knew why my airport extreme is not receiving an ip address. Im connected to the internet through a cable modem connected to a airport extreme. I know the internet works because when i connect directly to my macpro book the internet works fine.......its just when i try to use my wireless network. Also its not my wireless card in my laptop because it works fine with other wireless networks. The other thing is i know my airport extreme works because it will connect for a while and then it wont connect at all until i reset everything (modem, computer, airport).....any suggestions?
I called apple support and they said it was a comcast problem and comcast said it was a problem with my airport extreme......figures huh?
macpro book 15" Mac OS X (10.4.8)
macpro book 15" Mac OS X (10.4.8)i think i found the answer while browsing the archives.
http://discussions.apple.com/thread.jspa?messageID=2202720�
sjones posted this:
FIXED!
Ok, after getting the usual run around with apple not being able to advise me about my ISP and my ISP not being able to advise me about apple some wonderful support person at my ISP let a bit of info slip: Comcast have decomissioned a load of bad DNS servers today.
If you use Comcast and cannot connect via wireless try this:
Open applications/utilities/airport admin utility
select your base station
click configure
click internet
whatever is typed into the dns servers input boxes, delete it
update your base station
and you are connected to the internet.
It makes perfect sense if you have this problem. You base station has been trying to connect to the WAN using a decomissioned dns server. All Comcast dns servers are now distributed dynamically via the dhcp server.
I am working again! Hope you are too.
I tried it, and was able to connect to my mini-mac for the first time. Phew! Now, I'm going to try the printer and my powerbook. I hope my tinkering with those does not tamper with the delicate balance of the universe.
Sjones, if you see this, THANK YOU!
Power PC G4 & Mac Mini Mac OS X (10.4.3) -
Cisco E1000 wont connect to internet anymore - not getting DHCP ip address from Comcast modem
Very strange issue...
I have Comcast HSI and have been using my Cisco (Linksys) E1000 for about 3 years now. Bought it as a refurb.
My issue is that the E1000 is NOT receiving the DHCP info from my Comast modem.
The internet works when my laptop is directly attached to the modem; but when connecting the modem internet port
to the E1000 internet port it is NOT grabbing my ISP DHCP ip address thus no clients can broswe 'wired or wireless'.
I even updated the firmware and am starting to think its time to get a 'BRAND NEW' router as this makes NO SENSE!
I cannot release/renew as i have NO ip address to release. I have even tried to configure the E1000 as a static
using the ipconfig/all from when the laptop and modem was connected. Comcast says they see nothing on their end.
I also factory defaulted the router and redid the config to no avail.
Any help would be appreciated.
Solved!
Go to Solution.You need to enable MAC address clone on the router to recognize the connection from your cable modem. The link below would tell you how to configure the router to work with a cable connection and how to do MAC address clone.
Setting up a Linksys router with Cable Internet service -
Airport Express not receiving DHCP from Ethernet
Hello All,
Recently, one of my Airport Express 802.11n access points started using the self assigned IP address 169.254.238.166. While troubleshooting, I have found that this device will receive an IPv4 address when I connect it's Ethernet interface to my D-Link DG-S1248T, but not when I connect it to my Linksys SE2500 (the one it was connected to for over a year before starting this behavior). Ordinarily, I would suspect that something is preventing the Linksys from switching DHCP packets correctly to the Airport Express, but I can assure you the Linksys is sending DHCP packets because I am starting this thread from a Mac Pro connected to that Linksys, with a valid IPv4 address, and wireshark is showing bootps request and reply. I'm using bridged mode on the Airport Express, because I already have a gateway as my DHCP server with NAT, and created a wireless network with firmware version 7.5.2. I even setup another Airport Express 802.11n right next to the faulty one, same config (except the ID), same switch, and it works fine. I also swapped Ethernet patch cables on the Airport Express 802.11n Ethernet interfaces. The green LED access point went back to green when the cables were swapped, while the blinking amber access point stayed blinking amber. Therefore I believe the problem is localized on the faulty Aiport Express 802.11n. Has anyone else seen this fault? What is the root cause, and how did you repair the issue?
Thanks!The Airport Express was functioning normally as recently as last Thursday, when I unplugged it to move. I took care in transporting it so there was definitely no chance of physical damage.
You mean that it was functioning normally when it was connected to a cable modem last Thursday. Everything has changed. Unfortunately, the Express is known to sometimes have problems after it has been plugged in for a long time, is unplugged, and then started up again. On average, I lose an AirPort Express about once a year this way.
Power up the Express for a few moments
Hold in the reset button for 8-10 seconds and release
Allow a full minute for the Express to restart to a slow, blinking amber light
Connect the Ethernet cable from wall jack to the WAN "O" port on the Express
On the Mac, open Macintosh HD > Applications > Utilities > AirPort Utilities
Click on Other WiFi Devices
Click on AirPort Express
The utility will suggest a setup that looks similar to this, except you will see a different picture of the AirPort Express
Network Name = Name that you want to call your wireless network. Keep it very simple.
Base Statation = Name that you want to call the AirPort Express device
Password = Password that will be used for both the wireless and device
Verify Password
Click Next
The utility will setup everything for you. When you see the message of Setup Complete, click Done
Check the network -
Clients not receiving DHCP on layer 2 Vlan
I have flexconnect WAPs with local switching and local dhcp server on the switch.
I have one SSID assigned to a layer 2 vlan. The wireless clients are unable to receive an ip address on this vlan. The wired clients are able to receive an ip address on this vlan with no problem.
The WAP switchport is trunked and all of the layer 3 vlans are working with no problem.
The layer 2 vlan interface is assign the DHCP - ip address pool Vendor_VLan
Any help would be appreciated.
Thanks
LHHi LH,
Have you configured the SSID with "Local Switching" feature.
Also did you do the vlan mapping on this FlexConnect AP for the configured SSID ?
HTH
Rasika
**** Pls rate all useful responses **** -
PO is not receiving internal mail address and vendors are getting PO .
Dear all ,
If the user send Purchase order in SAP through mail for (Ex: itpurchaseordercompany.com and yyycompany.com, the purchase orders are not receving to the above mentioned e-mail id , But the external vendors are receiving the mail correctly,
Kindly suggest why the mail is not receiving internal employee mail id's
Kindly advise
RegardsPlease check transaction SCOT/SOST. Check the send orders state and traces there.
Markus -
HT203128 I am not receiving my email address verification letter.
I am not receiving my letter for me email verification.
Hi Tom Wakeling,
Thank you for using Apple Support Communities.
If you have not yet received your Apple ID verification email, please take a look at the article below for troubleshooting steps.
If you didn't receive your Apple ID verification or reset email - Apple Support
Cheers,
Alex H. -
WLC2412-Clients Not receiving DHCP addresses
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. Any advice would be greatly appreciated.
*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.
*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.(Cisco Controller) show>interface detailed management
Interface Name................................... management
MAC Address...................................... 64:00:f1:91:5d:40
IP Address....................................... 192.168.8.3
IP Netmask....................................... 255.255.255.0
IP Gateway....................................... 192.168.8.1
External NAT IP State............................ Disabled
External NAT IP Address.......................... 0.0.0.0
VLAN............................................. 8
Quarantine-vlan.................................. 0
Physical Port.................................... 1
Primary DHCP Server.............................. 192.168.8.49
Secondary DHCP Server............................ Unconfigured
DHCP Option 82................................... Disabled
ACL.............................................. Unconfigured
AP Manager....................................... No
Guest Interface.................................. No
L2 Multicast..................................... Enabled -
WLC2504 clients not receiving DHCP leases
I'm stock with a 2504 using version 7.0.220.0 that won't lease out DHCP adresses
Wifi clients are unable to get a DHCP lease from an external DHCP server.
The WLC are handling 3 WLAN, 2 using internal DHCP server, 1 (that wont work) using external DHCP. The external DHCP server, is a router/firewall (out of my reach) that suffered from a power out, a short while ago, ever since the DHCP is not working on that VLAN, if client are getting static ip adresses, everything works fine. If i'm using the same network link, and plug it into a computer, I get a DHCP address.
I've enable DHCP proxy
Debbuging DHCP, using: Debug DHCP packets enable
Gives me this:
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP received op BOOTREQUEST (1) (len 308,vlan 20, port 1, encap 0xec00)
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP option len (including the magic cookie) 72
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP option: message type = DHCP INFORM
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP option: 61 (len 7) - skipping
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP option: 12 (len 1) - skipping
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP option: vendor class id = MSFT 5.0 (len 8)
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP option: 55 (len 13) - skipping
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP options end, len 72, actual 64
*DHCP Socket Task: Nov 08 14:21:11.397: c8:0a:a9:cc:6d:f6 DHCP dropping packet (no mscb) found - (giaddr 0.0.0.0, pktInfo->srcPort 68, op: 'BOOTREQUEST')
ThanksHi Steen,
When a client is in DHCP REQ state on the controller, the controller drops DHCP inform packets. The client will not go into a RUN state on the controller (this is required for the client to pass traffic) until it receives a DHCP discover packet from the client. DHCP inform packets are forwarded by the controller when DHCP proxy is disabled.
Please check this, if still u r facing issue then provide more info.
Can you please paste a client debug of the client having DHCP issues.
Go to cli of the wlc and run the client debug . Diconnect the client then reconnect and gather the output and post.
Regards -
Wireless 2504,user not getting dhcp ip address
Hi 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.
Please help thisThere are multiple ways how the clients can get their IP-address in a WLC deployment.
From the WLC-FAQ:
How does DHCP work with the WLC?
A. The WLC is designed to act as a DHCP relay agent to the external DHCP server and acts like a DHCP server to the client. This is the sequence of events that occurs:
Generally, WLAN is tied to an interface which is configured with a DHCP server.
When the WLC receives a DHCP request from the client on a WLAN, it relays the request to the DHCP server with its management IP address.
The WLC shows its Virtual IP address, which must be a non-routable address, usually configured as 1.1.1.1, as the DHCP server to the client.
The WLC forwards the DHCP reply from the DHCP server to the wireless client with its Virtual IP address.Note: You can also configure the WLC to act as a DHCP server. For more information on how to configure a WLC as a DHCP server, refer to the Configuring DHCP Scopes section of the document Cisco Wireless LAN Controller Configuration Guide Release 5.1.
If you want more in-depth information you should read "DHCP with the WLC":
http://www.cisco.com/en/US/partner/products/ps6366/products_tech_note09186a0080af5d13.shtml
Don't stop after you've improved your network! Improve the world by lending money to the working poor:
http://www.kiva.org/invitedby/karsteni -
10.5.6 setup on mini with USB nic, not receiving DHCP from WAN (cable modem
Hello,
I'm probably in a little over my head thinking I could configure MacOS X Server without much IT knowledge. But I started, so I'm not giving up yet.
Here's my setup:
— cable modem ethernet connects to USB nic (the apple macbook air one) plugged into mac mini running 10.5.6 Server
— ethernet on mac mini connects to switch
— switch connects to airport base station set-up as bridge
— in the future other computers will connect over ethernet to the switch (that's why mac mini isn't plugged into base station directly)
Here's the issue:
— cable modem uses DHCP (no fixed IP).
— when first installing 10.5.6 Server, modem was connected directly to ethernet on mac mini, and picked up everything from DHCP, worked fine. Ran all the system updates (started with a 10.5 initial install)
— after everything was installed, I switched the modem to the USB ethernet adapter and ran NAT setup assistant. configured the USB Ethernet as the WAN, Ethernet as the LAN, turned on VPN.
— now the USB Ethernet won't pick up the DHCP of the WAN anymore. It did it once, and then never again.
— I've run the NAT setup assistant to switch the WAN and LAN nics to see if the USB Ethernet was the issue, but with the same results.
— This setup used to work although not quite stable on 10.5.4 server.
My initial questions:
— is the firewall blocking the DHCP?
— is the LAN DHCP messing with the WAN?
— in the previous version I had to set the replythresholdseconds from 10 to 0 in the bootpd.plist for it to hand out DHCP on the LAN, but there is no such entry in the pootpd.plist anylonger, and the keynet_address entry that was missing from the previous version of bootpd.plist is now present, so it seems the bootpd.plist has been fixed by apple.
— what am I doing wrong? Why doesn't this just work as advertised...
I know there are several of you out there that have the same setup working (I found posts from hirstey and DigiAngel with the same setup) so it must be possible. All your help is much appreciated!!
Thanks,
Hagenaer
Thanks!
Message was edited by: HagenaerThanks for your reply, DigiAngel.
DSL modems differ from cable modems as far as I understand. Where DSL modems are actually routers capable of NAT/DHCP, cable modems are just a network interface/brigde and can't do any of that. So it should pass the external IP to the computer. I'm writing on a laptop with the cable modem directly plugged into it, and it picked up the external IP etc. near instantly. The mac mini did the same before I ran the NAT setup assistant. I believe it picked it up once after that, but never since.
I had done a clean install, had the ethernet plugged into its internal ethernet port (en0) and was able to download all the system updates. Then plugged in the USB ethernet, I'm pretty sure it still picked up the IP there. Ran the NAT setup assistant and can't get anything to work anymore. Even with all services switched off.
So the modem is doing its job, but when I connect it to the USB nic the connection gets a self-assigned IP in about 3 seconds after seeing the cable is connected. The one time I've seen it get the right IP, it got a self-assigned IP first and then about 5 seconds later picked up on the correct IP. (And it picked up everything, including DNS server and search domains, which this laptop I'm writing on does not, although it works just the same).
Unfortunately, this laptop runs 10.4.11 which doesn't recognize the USB nic, so I can't test the adapter outside of the server environment. But I've had the genius bar test the adapter previously and it worked fine then, plus I've run the NAT setup assistant with the connections inverted (WAN over built-in ethernet, LAN over USB ethernet) with the same results: WAN gets self-assigned IP.
I've also tried configuring manual IP for the WAN from what I saw was given to this laptop (it kept the same IP even after being disconnected/reconnected, so I guess the IP for my modem won't change IP unless I reset it. Although I'm not sure if it's correct logic to assume the mac mini would pick up the same IP as well since I think that's actually tied to the MAC address and the IP doesn't belong to the modem but to the computer behind it).
Anyway, I'm not sure what to try next...
Hm. Wait, this might have something to do with it: the firewall logs the following:
Mar 22 14:12:07 server ipfw[4997]: 65534 Deny UDP 73.227.220.1:67 255.255.255.255:68 in via en 2
Looking up 73.227.220.1 gives me dns1.inflow.pa.bo.comcast.net, clearly my provider's DNS server. Trying to get me an IP that my wirewall is denying? Turning off the firewall doesn't make it pick up the correct IP though... I have turned off all services and still just got a self-assigned IP. -
Vmware clients not receiving dhcp from wifi networks
we are testing mac laptops running windows 7 virtually using vmware fusion at our office. One problem i ran into is windows 7 cant ever get the dhcp information from Domain Controller to get onto the network/internet here at the office. i have set the NIC to bridged mode in vmware fusion. it works fine at my house where i can get on my home network/internet just not in the office so i know it can be done, but not sure what setting on the cisco wireless lan controller 2106 controlls that feature. can anyone assist me in resolving this? if i plug it into the network using an ethernet cable everything works just fine, so i believe it is just a setting on the wireless controller that needs to be changed, at least thats what i am hoping, im hoping its not some limitation of the system......
Hi,
I thought i replied to this post.. but i havent.. extremly sorry!! here is the bug that we are hitting!!
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsi90344
There are workarounds to overcome this..
Workarounds: 1. Configure the virtual machine software for NAT ("shared networking") mode, not bridged mode. 2. If using 4.1 WLC software, configure the virtual machine to use static IP addressing, not DHCP. 3. If you have an AP that does H-REAP, change the AP mode to H-REAP and local switching so that DHCP (and other) packets do not traverse the controller.
lemme know if this answered your question..
Regards
Surendra
====
Please dont forget to rate the posts which answered your question and mark it as answered or was helpfull -
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