Cisco :: 5508 VLAN Select - DHCP Leases On Each Scope For Same Client
Sep 11, 2011
The 5508 is running code 7.0.116.0. I have created a group interface for 3 subnets and assigned the group to the WLAN. Clients are getting IP addresses in a round robin fashion. The issue or downside to this is if the lease has not expired before the next time the station connects to the WLAN it consumes an address on another subnet instead of grabbing the unexpired lease IP address on it's previous VLAN. It seems that the WLC determines the VLAN in the interface group before the DHCP request from the client in case the client already received a DHCP address that has not expired. This can be problematic since we have seen some iPhones requesting an address every 20 minutes thus consuming an address on every subnet in the interface group. Other than setting a lease time extremely low what can be done to address this?
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Apr 7, 2013
DHCP scope is configured on a WLC 5508.I'm checking if there' a way for WLC to clear the dhcp leasing when a user is diconnected from wireless?
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Aug 10, 2011
I have a 5508 WLC controller at the HQ with the employee ssid ,the dhcp scope on the ssid is 10.120.0.0/16 network.
However,I want this same ssid to be brodcasted to a remote site using HREAP access point but with different dhcp scope 10.102.0.0/16.
I have tried creating another interface for the remote site with a different dhcp scope(10.102.0.0) but the controller wont allow me create another wlan with same ssid that existed before to apply the new interface created for.
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Feb 16, 2012
I did the config below but unable to obtain the ip from the subnet scope 10.10.9.0. The switch is in the layer 3 mode.
no spanning-tree
vlan database
vlan 2
exit
voice vlan oui-table add 0001e3 Siemens_AG_phone________
voice vlan oui-table add 00036b Cisco_phone_____________
voice vlan oui-table add 00096e Avaya___________________
[code]....
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Jan 8, 2013
We implemented WLC 5508 software version 7.3, with 8 Aironet devices, most of them are AIR-LAP1131AG-E-K9, and two AIR-LAP1242AG-E-K9.I could really have benefits of VLAN select feature, but I noticed that it's not working like it should. Two interfaces are in Interface group, but from 45 clients only few of them has IP address from one subnet, others have from second sub.I see requirements for this to work is 32 MB of flash on LWAP devices..I only have 16 MB.. upgrade of flash on devices or something ?
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Mar 4, 2012
i have a controller that has mutliple dhcp scopes and should in theory give out close to a thousand plus addresses. But i have seen wireless users not getting addresses once the controller has leased about 490 ip adds. My controller is on 7.XX version.
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Jul 1, 2012
I am using Windows 2011 SBS and Windows 7 clients.My server has a DHCP range of 192.x.x.150 to 192.x.x.199 and all other I.P. addresses are static. On a workstation located at I.P. 192.x.x.13 I am seeing an address conflict.When I perform an "nbtstat -a 192.x.x.13" command from the server I am given the logical computer name of a staff members personal laptop.Investigation of the laptop reveals that it is set to DHCP, and clearly the address of 192.x.x.13 is outside of my servers DHCP scope, so this I.P.should never be assigned, let alone in duplicate.I Google this topic before posting, and it was suggested that IPv6 could be having an adverse affect. I determined this because I performed a ping on the laptop and only got a MAC address back rather than an I.P. address.However after unticking IPv6, and rebooting, the laptop is still causing havoc.I can set a static I.P. address on the laptop, however this is not ideal.
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May 21, 2012
I've created a tonne of dhcp scopes on my routers before never had any issues, however this one will not hand out any addresses at all, i even give the router a reload to see if any magic happened but nothing, ive ended having to put a temp server in with just dhcp installed until i get the router diong what it should my config below, its something simple i havent seen, as ive compared it to plenty of my working DHCP configs and seen nothing.
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Sep 25, 2012
I have a new 5508 that I am setting up. My first one from scratch.
Interfaces:
managment -> 10.10.10.10 ->dhcp 10.10.10.1
voice -> 10.10.7.1 ->dhcp 10.10.10.1
guest -> 192.168.1.2 ->dhcp 192.168.1.2
Local DHCP (via the 5508) is for the guest network while the management and voice use the Windows DHCP server.
My problem, Voice and guest work fine. I have two SSID's (one 802.1X and the other PSK) that use the management interface that will not get an IP. I have enabled dhcp proxy from the cli on the controller. I tried with the management VLAN tagged and untagged.
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Aug 31, 2011
User is connecting to 5508, running 7.0.116.0. Previously worked on another AP. TV (client) is set to use dhcp. As other posts have mentioned, "DHCP Addr. Assignment" checkbox is not checked for this wlan, but I also switched it to Required for this wlan but it did not make any difference. Seems to be a problem with just this client as many other clients are on this AP with no problems.
Users have to register their MAC to get on our wireless system, but there is no encyption or security enabled once the device has been registered.
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Feb 22, 2013
I have a ASA5505 that i have running asdm 6.4 on it and have tried setting up some DHCP scopes for the interfaces.I have the security plus key.I set up 4 interfaces all with different subnets and all with different DHCP being doled out by the firewall for the time being.Anyway, 3 of the 4 work.I have tried to change interfaces wondering if there was an issue with that phy device.I tried enableing the subnet that would not work first and it didnt matter still would not issue dhcp.the other 3 work fine.Is there a limitation to the amount of scopes that will issue dhcp for an asa5505 ?
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Feb 6, 2013
i am using wlc 4402 with a mgt ip 172.26.150.x/24 and ap manager ip 172.26.150.x/24, my all ap get the ip address from dhcp . currently in dhcp server 172.26.150.3 to 254 dhcp scope is configured. at mysite some devices are configured like ipad,iphone or galaxy tab with mac binding in dhcp server. now this pool is almost full. i have a policy configured for these devices for mac binding is done in DHCP. to increase pool what are the changes i need to do in wlc. what are the changes i need to do in dhcp server . is policy made for mac binding in dhcp server will get affected by this ?
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Jun 26, 2012
1 Cisco switch stack (SGE2010) in L3 mode, 2 Vlans.
Vlan 1 = 192.168.0.253/24, untagged on all ports except 14/15
Vlan 2 = 192.168.22.1/24, untagged on port 14 and 15
SGE2010 default route 0.0.0.0/0 next hop 192.168.0.1 (Checkpoint UTM)
DHCP Relay enabled
DHCP server set to 192.168.0.16
DHCP interface set to Vlan2
[code]....
Expanding the ICMP entry, it appears that the destination is the pc client since it shows a Dell mac address, and the source is the Checkpoint UTM (Sofaware).
I can ping and tracert from the Checkpoint to my static IP on Vlan 2. The same goes for the DHCP server to/from Vlan2, so I am confused as to why the routing is failing. I have tried adding Port Fast to the stack ports, but nothing changes.
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Mar 29, 2012
I have 2 units Cisco WLC 5508 running software version 7.0.220 with 70 over units Cisco AP 1262N and 1242AG. Some of wireless clients having problem to get the correct IP address from the DHCP server. There are 2 units of Microsoft DHCP. Both DHCP server ip have been configured on the Interface at the WLC. The core switch also being configured with ip helper. I've attached the debug output of one of the wireless client during the problem.
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Oct 3, 2012
I change DHCP scope to match corporate IP scheme Friday came back To discover only some stations picked up new leases from the scope.
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Jul 11, 2011
My Network is running Windows Server 2003 and with more than 150 Users. But last week, I notice that a program is changing my DHCP server IP Address scope.
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Jan 15, 2013
Just inserted a new 5508 WLC into the network. We current have 3 4404 WLCs, and there was a need to duplicate, as much as possible, the configurations on the 4404s, and the design. The 5508 came online as expected. We moved a few access points over to it. The APs got the correct address range. The clients are expected to get addresses in the same scope range as the APs. However, the clients are receiving addresses in the management IP scope.I know there are two "not a good way to do it" in here. Why is the management address range in the DHCP scope, and why are the clients using the same scope as the APs. We are going to change that. For now, the AP and client in the same range has been going on since we rolled out wireless in 2006.The 8 ports on the 5508 are configured for LAG. There is no dedicated port for management. They tell me not to do that on a 5508.
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Jul 8, 2012
I am trying to setup VLANs and most of configurations are working ok now except IP address assignment from DHCP. If any computer in VLAN 120 or 130 configured with manual IP address, then all works fine. It can reach internal servers and the internet without problem.If the IP address is assigned automatically then any computer in VLAN 120 or 130 are obtaining IP address (strangely!) from VLAN 100. Because switch ports that connected to the computer belongs to VLAN 120 or 130, the computer cannot reach internal servers and the internet with ip address from VLAN 100 . All SVI interfaces for VLAN 100, 120 and 130 have ip helper-address option defined pointing to the DHCP server. No DHCP snooping enabled on all switches at this point. DHCP server have three scopes for the three different VLANs.
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Apr 2, 2012
The company I work for owns a remote manufacturing facility that houses a stack of five 3750 switches that function as the core switching system for the plant. DHCP services are configured on the 3750 stack.
There are currently three VLANs configured, one for data and one for voice (144 and 244 respectively) and one for UCM servers (200), with corresponding subnets of 10.44.32.0 /19, 10.44.0.0 /19 and 10.44.100.0 /24.
The current DHCP scope configurations are as follows:
ip dhcp pool Plant-44_DHCP
network 10.44.32.0 255.255.224.0
default-router 10.44.33.254
[Code].....
My question is will the addition of this scope in the manner presented cause any problems with PCs or IP phones outside the targeted recepents receiving the wrong IP information from this scope?
I plan to identify the users that should be members of this VLAN 444 and change the switchport mode access configuration on the corresponding switch ports from VLAN 144 to VLAN 444. The voice VLAN 244 will remain the same.
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Feb 23, 2012
In our test set up, we have two WLC 5508 Controllers connected via Checkpoint UTM-1 firewall Inside and DMZ Interfaces. Both the WLC controllers are connected to the firewall via Cisco 3750 switch. On the Local (Inside) Controller, guest SSID is enabled and attached to the wireless management Interface. On the remote anchor controller, guest SSID is enabled and attached to the Management Interface as well. The following configs are replicated on both the Controllers.
SSID Name - guest
Interface - Management ( VLAN 10 on Local and VLAN 20 on remote) -
Mobility Group: Same configs at both ends
SSID Anchor : Anchor SSID on local and local SSID on Anchor.
AP: CAPWAP 3502 Management Subnet
[code]....
Is there any thing missing in the wireless configs and or the firewall rules as i could not see DHCP request back from the Anchor Controller. Also, after DHCP is obtained, the web authentication request will be redirected to an Amigopod device for authentication. In this case is the redirect URL congiguration to be performed only on the Anchor Controller or is this to be replicated on both the Local and Anchor Controllers.
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May 13, 2012
In an enviroment with WCS and a WLC5508 with 40 AP's (WAPs are either 1262's and 1252's), I have noticed that the bulk of users are infact operating on 802.11g although most operating notebooks are running 802.11n capable NICs (including my own laptops NIC - but yet when I connect I connect at 54Mbps.). Only a small portion of registered clients are using 802.11n. All my WAPs have both radios enabled?My question is how does a client notebook select a "prefered" band of 802.11n. I know in some cases the wireless NICs themselves have an option to select the "Prefered Band", but there are many notebooks out there that dont have this option. What would make a client connect at 802.11n over 802.11g? Who makes that call ?
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Sep 27, 2012
I have several WLC 5508 with 7.2.110 firmware. My questions are:
(1) Is band select is enable by default on 7.2.110?
(2) All the variables settings on the band select, how do I set it up to make 5 ghz more preferable than 2 ghz?
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Apr 9, 2013
Q: If i m going to do a Bonjour Gateway deployment, do i still need the vlan select feature on the wism's or is enabling multicast enough?
Details of the Q:
I m working with WISM s and WISM2;s, 1130 and 3602 ap;s. Cores are 6509-E's.
i m going to implement a Bonjour gateway (which is an Aerohive ap, no wifi enabled, its just a Bonjour gateway)
This ap is connected with a trunk port (to a 6509-E) and has the wifi client vlans on the trunk as allowed vlans. It also has an allowed vlan for AppleTV;s which will be wired devices.
The Aerohive gateway gets an ip address in every wifi subnet, so far so good.
I was thinking that if i enable multicast :
- globally on the wisms, with mcast-mcast distribution
- on the SVI's for the wifi client vlans
- on te SVI's of the vlans for cisco aps
- on the SVI for AppleTV
- SVI for wism management
- SVI for the Bonjour gateway
then do i still need vlan select? Maybe a stupid question, but i m not sure how to interpret some things in this document.
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Apr 21, 2013
Do the problem caused by the modems itself or it just sign of faulty Ethernet switch (using 20 port Allied Telesis ethernet switch).
Sometimes I cannot connect to internet due to "unidentified network" buy i can resolve this problem by restarting my modem + switch.
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Jan 23, 2012
I have a fresh install of LMS 4.0 on Windows Server 2008 Standart SP2. I have one NIC with static IP configuration. I also disabled DHCP client.The problem is follows: when I go to Inventory - Device Administration - Add/Import/Manage Devices, I always get this error:Error in communicating with DCR Server. DCR Server may be down. Please start the DCR Server and then refresh the page.Reload server/ Daemon Manager dont solve this.I try to beat this problem 2 days already. Second uninstall also doesnt solve the problem..
About a week ago I tried to clear log files which was 270gb (syslog.log) and after that restarted the server. And all inventory devices suddenly disappear! I could find it from search menu but cant access - cisco works said that there is no such a device in Device Repository or I havent enough right to view it (but i logged as admin). And after this i failed to add any device in Inventory. So I reinstall Cisco Works and get that DCR error..
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Jun 11, 2013
We've encountered problem from the last few days with DHCP on certain SSID's. We have a wireless network with 13 SSID's being managed by a WLC 5508 pair configured as high availability (52 AIR-CAP3502I). Yesterday we encountered an issue with DHCP on a few of the SSID's but not all, and as a last resort a reboot of the controller fixed the problem. Statically assigning addressing allows for traffic to traverse the network out to the web and back so I don't think it's a VLAN configuration issue on the wired side. It's worth mentioning however that the controllers are configured for a LAG to HP switches. DHCP is being handled by an external windows DHCP server and the primary server address points to the gateway which has a relay configuration pointing to the windows server on the other side of it. Again, rebooting the controller fixed the problem and the web traffic traverses fine if statically assigning addressing.
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Apr 12, 2011
I have two number of WLC model 5508 running IOS version 7.0.98.0. And One WLC in DMZ with the same model and IOS version. AP model is 1141. The Two WLCs are integrated with ACS. I have a SSID named EMployee. The DHCP for the users are configured in a seperate DHCP server and i have mapped this DHCP server IP to the interaface Employee.And this interface is mapped to the SSID as well.. But my client is not receiving the DHCP IP. Attached are the debug logs from the client.
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Nov 13, 2012
I am very interested in the new 7.3 feature HA.Also I can read that it is recommended to connect the two WLCs directly. How to use a L2-VLAN between them, in fact to bridge a distance between two data centres?
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Apr 25, 2013
I have a Cisco ASA 5505 I've configured as a DHCP server. I'm getting DHCP on workstations attached to the appliance, but I'm getting the following message when the appliance loads:DHCP Client: can't enable DHCP Client when DHCP Server/Relay is running on the interface DHCP: Interface 'inside' is currently configured as SERVER and cannot be changed to a CLIENT by a CLIENT featureI'm not trying to configure this thing as a client, so I'm not sure why the system is producing this message.
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Oct 19, 2012
Can I have two asa firewall between dhcp client and dhcp server. if yes what solution i have to have to get dhcp leases. should i have to configure dhcp relay on both the asa.
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Feb 4, 2013
I have a WLC5508 , we are using external DHCP for WLANs
one WLAN is able to get IP from DHCP server but another WLAN not , the DHCP server is same , only 2 different scopes.
This is debug
*DHCP Socket Task: Feb 05 21:26:43.106: e8:06:88:9b:a8:04 DHCP received op BOOTREQUEST (1) (len 308,vlan 1, port 1, encap 0xec03)
*DHCP Socket Task: Feb 05 21:26:43.106: e8:06:88:9b:a8:04 DHCP processing DHCP
[Code].....
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May 13, 2012
We recently upgraded our 5505s to 8.2(5) 26 and noticed that each will crash after a cerntain amount of time. Some crash every 30 minutes other will crash every 4 to 8 hrs. The only difference would be the user's home ISP and/or home router, if they have one. They are configured with a dynamic dhcp IP address for the outside interface and the crash files starts with the following:When we downgrade back to 8.2(5) 13 the problem goes away. Any known bugs for this version? I haven't been able to find anything yet. We do have one 5505 that does not have this issues. The only thing that may be different is that it was never at 8.2(5) 13. We had downgrade it from a 8.3 version.
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Jun 21, 2011
how I can get to the DHCP client table on a Cisco 891 Router ? We just upgraded our router from a WRVS4400N to the Cisco 891. THe WRVS4400N has the feature DHCP client table that I can see the Client host Name and IP address,Mac Address I have CCP and CCP express installed on my system?
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