X1000 stops giving out Wireless DHCP IP addresses

I have 2 X1000 switches, the prmary switch, IP, 192.168.1.1 connects to my ADSL line upstairs and handles all DHCP..
My second router is downstairs and has been configured as 192.168.1.2, there is a LAN cable running from a LAN port of the primary router to the secondary router. Any device that I connect to the second router via the LAN ports works perfectly. However, when I connect a wireless device, the first time it works,If I then disconnect from the second router and reconnect I connect to the wireless network, but I cannot get an IP.
I've gone through posts here and reset to defaults and reconfigured according to the posts, the problem persists.
Router 1 - Works perfect, no problems
Router 2 - IP 192.168.1.2
Router 2 is configured as Ethernet
different SSID to router 1
different channelto Router 1
I've turned off internet filtering and the firewalls to see if that would make a difference, no change.
It's really strange as DHCP works perfect via an ethernet connection to Router 2, but wifi only works once, thereafter you connect to the wifi fine, but the wifi device never gets an IP Address. I've checked for new fw and there is only version 1 available and I have already gone back to factory defaults and re-setup the router.

murattug wrote:
Same problem here
we have 5 older model linksys adsl modem (all of them works as wireless acces point) works well
yesterday we bought 2 x1000 and I tried to configure as wireless router. our network has only one dhcp server and network gateway and its ip is 192.168.1.234
I configured x1000 as router, its ip as 192.168.1.16, dhcp relay mode, relay server address: 192.168.1.234
then I tried to connect using my smartphone, but it never gets an ip number.
after first unsucsessful connection try, I downloaded firmware and flashed the x1000
but no change
thanks
Be sure to avoid IP address conflict. If you are to configure the X1000 with an IP address of 192.168.1.x, plug the cable from the modem to any of the LAN ports of the X1000. If you are to configure the X1000 with an IP address of 192.168.x.x, plug the cable from the modem to the Internet port of the X1000.

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my iPhone 4 stopped giving out sound..

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If that doesn't work, stick some headphones into the headphone jack and see if you can hear the sounds from the headphones... the device may also think there is headphones plug'd in which can also be the issue
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RSV4000 DHCP Gateway address problem

I have an RSV4000 which I'm using as a gateway. I changed the default 192.168.1.0/24 network to 10.255.255.0/24 and configured the DHCP address pool to use 64 host addresses starting at 10.255.255.64
Every so often users on VLAN 1 get a gateway IP address of 192.168.1.1 even though they received a DHCP address of 10.255.255.64, 65, 66, etc.
I ran a packet capture and the RSV4000 is actually giving out the wrong gateway address.
I have to power cycle the RSV4000 and it works until some random point in time, then starts giving out the wrong gateway address again.
Is Cisco going to fix this?
I'm running version 1.3.2.0 and I do not have the V4 model so I can't run v2.0.0.3

Hey mdoldan,
Were you the one that upgraded the firmware of 1.3.2.0 on the router or did you receive it like that.
This is a very odd case, where it is giving out ip address on the default lan even though you changed it.
Have you tried reflashing the firmware, factory resetting the router and reloading the configurations back to it.
I would try that and see if the problem persist.

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I have a WRT310N. For wired ethernet there is no problem whatsoever but when I try to connect wireless laptops, cameras, etc. I can only do it 2 out of 10 times.
I usually get a limited connectivity error. It seems like the unit isn't giving out IP addresses over wireless. After rebooting and/or resetting it will sometimes work for a bit. There seems to be quite a few posts that are like mine so I don't have a good feeling about there being a solution to this problem.
Is there?
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Upgrade/reflash the firmware for your router, reset the router and reconfigure. This should solve your problem.

DHCP giving out incorrect DNS server information

Migrated my ONLY DHCP server from a 2k3 server to a new 2k8 server and I cannot figure out why it wont give out the correct DNS server settings.
Here is what I have tried so far:
Stopped service on the old DHCP server and forced a /release /renew on the workstation.
Stopped service on both DHCP servers to see if there is some other DHCP server, computers wouldn't get any IPs.
If I setup a reservation for the workstation it will give out the CORRECT DNS settings.
Ran a GPO Policy result for the user and computer I'm testing and no IP configuration is configured at all for any GPO.
Other Information:
Only have 1 scope setup.
When I run a ipconfig /all it does show the DHCP server as the correct one (new server).
This problem was happening on the old server as well, I thought maybe migrating to a newer server would help but I'm getting the exact same results.
Thanks!

Hi,
We can perform a network capture on the client. It will show the process of the DHCP.
Please check the DHCP offer message sent by the DHCP server and the DHCP request message sent by the client.
Make sure that the server gives the right DHCP setting.
If the server is giving the right setting, it should be a client issue. Please check the event log of the DHCP client.
If the server is giving the wrong setting, it should be a sever issue. Please check the configuration of the DHCP sever.
To download Network Monitor, please click the link below,
http://www.microsoft.com/en-us/download/details.aspx?id=4865
Best Regards.
Steven Lee
TechNet Community Support

Incorrect DHCP server address to wireless client

Guys,
I have deployed a centralized wireless architecture with 2 x wisms in each of our DCs. I just noticed the clients are receiving incorrect DHCP server address, please note there is no issue with connectivity, i just want to know why incorrect DHCP server address is handed out to the clients.
The DHCP server address received is apparently virtual interface address of the WiSM. i am running WiSM firmware 7.0.116.0
Any information is appreciated.
Cheers
AP

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Out of available IP addresses on one DHCP server, will other DHCP servers field the request?

I have three WinServer 2012 R2 domain controllers that also act as DNS and DHCP servers.
I have a guest wireless network that has its own subnect, 10.121.176.0/20
We have our DHCP scopes split this way across the three domain controllers with a DHCP lease time of 1 day
Domain controller 1, 10.121.176.11 - 10.121.181.255 for a total of 1,525 addresses
Domain controller 2, 10.121.182.0 - 10.121.186.255 for a total of 1,280 addresses
Domain controller 3, 10.121.187.0 - 10.121.191.254 for a total of 1,279 addresses
This gives us a total of 4,084 addresses to hand out on our guest wireless network which is plenty. I just looked at each servers stats and this is what I see
Domain controller 1 - 717 addresses in use, 808 available
Domain controller 2 - 900 addresses in use, 380 available
Domain controller 3 - 1280 address in use, 0 available
On domain controller 3 I am seeing lots of DHCP events
Event ID 1063 - There are no IP addresses available for lease in the scope or superscope "GuestWireless-176
Event ID 20287 - DHCP client request from 28E14CE87EFB was dropped since the applicable IP address ranges in scope/superscope GuestWireless-176 are out of available IP addresses
Two questions:
Once Domain Controller 3 rejects the DHCP request since it is out of addresses, will this request be fulfilled by one of my other two domain controllers?
Is there any way to even out the leases on these DHCP servers? Not sure the mechanism behind a client choosing one DHCP server over another

1 yes, the dhcp server who's scope is full will not do a dhcp
'offer'
2 dhcp that answers fastest with a 'offer' will win. A delay is configurable (but changes nothing
about the root scenario were the fastest will win)
Note that if the scopes overlap on the servers, they might not lease out all the addresses in the scope.
I would enlarge the scope as you will want to fence against unavailability of one of the servers (or a network connection for that matter). you currently have more addresses leased out than any set of two of your servers can offer.
MCP/MCSA/MCTS/MCITP

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Change default wireless dhcp

I want to deploy an Airport in an existing network address space of 10.90.8.0. The default wireless dhcp address space is 10.0.1..0. Can I change that default or must I reassign all ip address to conform with the Airport default?

If you configure the AirPort Express in Bridge Mode, it will pick up an IP address from your "main" router.
If you have the AirPort Express configured to provide DHCP services and hand out IP addresses, then those addresses will be limited to the 10.0.x.x range. The Express can also provide addresses in the 192.168.x.x range and 172.16.x.x range as well.

Lights Out Management IP/Hardware Address

I've got LOM working with a unique IP adress on Port 2. The internet is connected on Port 1, and the LAN on Port 2. Since Xserve is also serving as a router and as a DHCP server, I'd like to block out the LOM IP address from the DHCP pool by giving it a static IP address. If I do this, what MAC address do I need to asign to it? If I use the MAC address for the ethernet port, won't this foul up all the LAN services which are using a different IP address on the same ethernet port to get to the services?
XServe Mac OS X (10.4.8)

> The static IP address assignment pane in the X-Serve Server Admin software will not lock out an IP address unless a MAC address is given
That's the wrong approach and not what that feature is designed for.
The 'static addresses' in DHCP are used to assign the same IP address to a given machine so that when that MAC device requests an IP address, it gets a consistent answer. The LOM shouldn't use DHCP, so putting in the DHCP static table is moot.
Instead you should use a specific range of IP addresses for dynamic hosts and a separate set for static devices (including LOM), making sure the two do not overlap.
For example, if you're using the subnet 192.168.123.0/24, you could use something like 192.168.123.1 through 192.168.123.200 for DHCP addresses, and 192.168.123.201 through 192.168.123.254 as static addresses (including things like your router, LOM devices, etc.). Of course you can vary the ranges according to whether you have more DHCP or static devices in your network, and if you start from opposite ends (e.g. start the static devices at .254 and work downwards), you can always adjust the split without major impact (e.g. lower to .150 if you find that 54 static addresses isn't enough, or raise it to .220 if you need more DHCP addresses and you haven't reached that far down with static devices).
Since the DHCP server doesn't assign anything over .200, it doesn't need to know anything about devices that have static addresses.
This approach has the advantage that if you change your DHCP server at any time (e.g. delegate the task to your firewall) you don't have to worry about re-entering all the MAC addresses for those static devices. In addition, if your DHCP server fails for any reason, you still know where your critical devices are on the network.

Releasing unused DHCP IP addresses in OSX Server 10.4

In OSX Server 10.4.11 is there any way to release unused DHCP client addresses in the Server Admin app? We have 73 clients showing (and only 30 on the network) because various computers have been added to the network and removed/reinstalled at various times, and that means we're running out of available addresses in our little chunk of the subnet.
We've previously set a longish lease time on DHCP addresses because we've had problems in the past with sleeping Macs being woken up and having clashing IPs with other Macs that have had that IP reassigned to them, but it means that we do have a long list of unused DHCP clients.
Does Server 10.5/10.6 allow the release of DHCP addresses from the admin app (oh, for a right-click delete!), or is that just not possible in the DHCP protocol (NB I'm trying to release unused IP addresses, not asking live clients to rescind their IP address).

It's not legal within the DHCP protocol - as far as the server is concerned, that IP address has been handed to the client and should be reserved for that client until the lease expires. The server has no way of knowing whether the client is still using the address.
You may be able to break the rules, though - the server stores the DHCP leases in /var/db/dhcpd_leases, so you should be able to stop the DHCP server, edit the file to remove the unnecessary leases, then start the server back up. No guarantees, tho'.

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.

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

802.1x and DHCP assigned addresses

I've done a lot of reading on this but I am still confused. I'm not a Microsoft guru so I don't really know waht is going on with login scripts, or cached user/pass.
Scenario 1
==========
I have 802.1x implemented and Joe the contractor comes into the office and plugs in his laptop. He is a guest. I allow guests to have access to a guest VLAN. How can Joe automatically get an IP address, or does he have to do ipconfig /renew?
Scenario 2
==========
What is the behind the scenes process that takes place for my corporate users that login to a domain....how do they get DHCP assigned addresses?
Thanks

I assume from what you have written 'Joe' doesn't have an 802.1x supplicant on his PC? Therefore the switchport eapol frames are ignored by the PC and after a timeout the port is placed in the guest vlan. You need to make sure DHCP is enabled for the guest vlan - either add the appropriate entried to the protecting ACL or add a scope on the router? Depending on the timeouts you may have some delay issues here; I would test this before you roll it out.
For clients with 802.1x supplicants what happens is the PC effectively thinks it is disconnected from the network until the supplicant has authenticated. Once it has authenticated the PC thinks the network adapter is then connected and it will attempt to lease an IP address by broadcasting a DHCP request.
There are however a few 802.1x supplicants and I am not sure how they all integrate with the host O/S. I know the built-in Microsoft one operates as I have described.
HTH
Andy

X1000 stops giving out Wireless DHCP IP addresses

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