Cisco Wireless :: 4402 - DHCP Scope Increase And Changes In Wlc
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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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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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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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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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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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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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 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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Apr 17, 2012
I have successfully implemented wireless guest access using 4402 WLC as the Anchor and 5508 as Foreign. The Anchor controller also provides dhcp services to guest clients. The 5508 is LAGged and there is no issue with the guests traffic separated from corporate. At a remote site, there is a 4402 WLC using LAG and also acting as a Foreign controller. But when a client connects to the guest WLAN, it obtains a corporate dhcp address instead of the dhcp address assigned from the Anchor controller. The guest WLAN setting is the same as with the 5508 controller i.e. DHCP server override is ticked and the management IP address of the Anchor controller is specfied. Also DHCP Addr required is ticked. Why the 4400 controller is not forwarding dhcp requests to the anchor controller and instead sending to the corporate dhcp server.
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Aug 26, 2012
I have this guest wlan working with web authentication, as you may know in order to get authenticated you must have an IP address first then have a valid username and password. The problem is that if you don't have valid credentials you keep the IP address anyways.I'd like to know if there is a way to release the IPs that are not being used? The WLC is the DHCP server for this network.
-WLC4402
-6.0.202.0
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Jan 16, 2013
I have a 4402 (version 7.0.235) working with 10 units of 1121 APs connected to it. The WLC is not configured to work in LAG mode. Physical portt #1 is connected to the Main Switch (trunk). I have 3 WLAN mapped to 3 Different VLAN and Everything (security and internal, external DHCP) is working swell...Now- I have connected Physical port #2 directly to an ADSL Router (giga port), Configured Port 2 as untaggedwith the proper IP details.I have configured this interface to receive DHCP from the ADSL Router and for some reason, Clients are not getting addresses.When I assign a Static address to my laptop I get internet access and all is nice. I tried configuring The WLC internal DHCP server (instead of the ADSL router) and that didn't work. It seems like a DHCP problem but I dont understand the source of the problem of think of the solution.When turning off the proxy settings I noticed that it worked. Is there anything to do with that? The problem was that after a while the other WLANs starting causing DHCP issues as well.
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Apr 8, 2008
I am trying to setup a guest vlan. I set up an interface for the guest vlan on my 4402 controller. I assigned the guest vlan interface an IP of 192.168.2.10 with a 24 bit subnet mask.
This vlan will go to my DMZ where there is no DHCP server so I need to setup the internal DHCP server. I created a new scope but I'm having trouble with what to put in the Network field for the DHCP scope. The pool addresses are 192.168.2.100-200. with a 24 bit subnet mask.
Every time I try to apply the configuration I get an "error in setting DHCP scope network and netmask".
I've tried using:
192.168.2.10
192.168.2.255
192.168.2.254
as entries for the Network setting but no go. The docs say to enter the IP address used by the management interface with subnet mask applied.
I was assuming they meant the interface for the guest vlan.
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Sep 29, 2011
When on the management interface the clients can't get dhcp but the AP's can on the same vlan. I've tried enabling and disabling dhcp proxy, and using a remote dhcp server as well as the internal server. This same config works on the 4402 we're replacing with version 5.2.193 on it.
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Nov 27, 2012
We currently have a cisco 4402 with firmware version 6.0.182.0 and 4 WLANs currently running on it, we found the need to add an additional WLAN and after the configuration was completed and I tried to connect to it I found that we are not getting an address. If i connect a laptop to the VLAN I can get an IP and am able to browse. If i hard code an IP into a device and connect to the wireless i am able to connect and browse.
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Feb 3, 2011
Our Guest access system seems to be having problems with DHCP. It seems to take a while to deliver an IP address making the client device show the "limited or no connectivity" message, which of course makes the users complain. On one occassion I have seen my own client eventually picking up an address even after the limited connectivity message appeared. On another I saw the debug showing "Dhcp request for autoconfig address", which I suspect is a symptom of the problem.
Our Anchor Controller is the DHCP server and is a 4402 running 7.0.98.0 - I've attached some DHCP packet debug.
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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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Nov 15, 2012
We have a WLC 4410 management IP Address configured as 10.40.124.59.and configured VLAN1 on WLC with IP address 10.40.126.250. we are unable to ping the VLAN1 ip address from the switch. even unable to ping 10.40.126.252 (Gateway). Is there any limitation that we can not configured ip address from secondary scope...Switch vlan 1 configuration is ......interface GigabitEthernet0/0.1description Business VLANencapsulation dot1Q 1 nativeip address 100.93.50.2 255.255.0.0 secondaryip address 10.40.126.252 255.255.255.0 secondaryip address 10.40.124.61 255.255.255.192 secondaryip address100.43.94.252 255.255.255.0.
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Jul 1, 2011
How to increase my Laptop wireless range?
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Apr 15, 2013
I am considering deploying several of these for our church to provide internet access. When reading the manual, I found on the last few pages that the device only supports a max of 63 users at a time. Is that correct? If so, any way to add more ?
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Jul 1, 2011
how to increase download and browsing speed using dial up connection using nokia mobile phone as a modem
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Nov 9, 2012
works well upstairs but does not work well about sixty feet from the router
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Oct 29, 2012
I purchased and installed a new EA4500 wireless router. At the same time i had a new Voip phone system installed as well which i'm having issues with. The main issue is that my phones communicate with the service every 240 seconds....the issue is that my NAT timeout is below that 240 threshold. Thus my phones go in and out constantly. increasing the NAT Timeout.
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Sep 28, 2012
The GUI times out after 60 seconds.
Since the the "exec-timeout" setting has a default of 10 minutes (if I'm not mistaken), I don't think I could change the timeout value with that command.
Under the "Association" tab of the GUI, there is an "Activity Timeout" subtab and settings for 5 device classes, all set at 60 seconds.
I would guess the setting in question can be configured here. Is the client station device class what I'm after?
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Nov 9, 2012
I have an integrated 881W with a built in 801 access point. I'm interested in increasing the range of my AP. I'm interested in considering any configuration changes while still maintaining support for N. I've included a copy of my running config.As well, I've heard of high gain antennas. I'm using the default antennas that came with the 881W. If there are better antennas that I can buy to increase my range, I'm interested in considering that as well.
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Mar 3, 2011
i use college wifi.but college authority provide very slow download speed .how to increase this speed.
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Apr 26, 2012
I just installed a new EA4500 and the range is terrible. How can I increase it?
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Aug 12, 2011
I just got a new modem and was also hoping to boost the speed of my router without buying a new one. Are there any ways to increase the speed of the modem i already have?
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Dec 5, 2012
I have my router and modem in an upstairs office. I get terrific signal strenth and wifi connections throughout 80% of my home. I would like to shore up that remaining 20%.
I cannot realistically move my EA4500 to a "more central" locationBefore purchasing this router, I used a netgear + netgear extender. They worked horrifically together along with my wifi devices - they dropped signals every 4-5 minutes, even with bare-bones data usage. (I've had no connectivity issues, thus far, with the Linksys product)My home has two levels - no basement, no crazy concrete walls or anything. I figured on installing an extender OR another EA4500 downstairs to extend my signal. How two EA4500's work together, if anyone has a similar set up, compared to how (and what model) an extender may work to boost my signal distance in this situation. Primarily, in that "20%" deadzone, I need to use an iPad / iPhone - nothing that would consume tons of bandwidth.
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May 8, 2012
I have an E1000 router in my office with a cat5 cable going to my daughters bedroon thru several doors and around some corners. She (recently moved back in) has an E1000 router also.I need to know how to use both routers to increase the wireless signal in her bedroom.I have not tried anything yet.The router in my office is configured with an address of 192.168.2.1.
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