I am using 2 anchor controllers 5508 as DHCP server. Anchor controller A is primary and anchor controller B is secondary. From time to time, client will complain "duplicate IP address error" when they try to connect guest wireless.First question: both anchor controller should have a recorder of IP address which is assigned to each PC, right?Second question: is there any way this type of issue can be avoided?
View 3 RepliesI 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.
View 12 Replies View RelatedI am getting the following error messge on Cat4500:
Feb 18 23:37:53.098: %IP-4-DUPADDR: Duplicate address 10.237.66.3 on Vlan601, sourced by 001d.096b.4858
Feb 18 23:38:58.092: %IP-4-DUPADDR: Duplicate address 10.237.66.3 on Vlan601, sourced by 001d.096b.47ed
I have tried changing adapter settings, did the ipconfig /release, renew and still no luck.
View 1 Replies View RelatedI have two 2960's in this new environment that I am administering. I am receiving a message on one unit (Designate it 2960-2) of %IP-4-DUPADDR: Duplicate address 192.168.168.8 on Vlan1, sourced by 3037.a63e.540. The "sourced by" address is the 2960-1. I do not know how these units were originally set up. How can I determine where the duplicate address is originating from.When I perform an ARP -a the address that corresponds to the 192.168.168.8 is the mac address of the ethersvi interface on the 2960-1. I
View 3 Replies View RelatedI am using LMS 4.0.1 to monitor the data center network devices. I have two core switches, each core switch has an ACE module installed on it. I have configured many virtual context on each ACE module, and these ACE contexts are acting as primary and standby roles. The problem i faced with is LMS reports the virtual ip address configured on each ace context as duplicate ip address, and i didn't know how to deal with it. As to my understanding, this should be the normal behavior due to my setup, but how can i remove this alarm on LMS 4.0.1?
View 1 Replies View RelatedISE 1.1.3
Cisco 3750 switches
Windows XP / 7 / 2008 clients
I'm having some weird issues were if a client connects to a switchport and happens to be using a static IP address then the client warns of a duplicate address problem. Also the client will then only show the default gateway within ipconfig even though the IP address / mask is still in the GUI network properties of the adaptor. This is happening with Windows 7 and Windows 2008 devices.
Windows XP clients don't get the issue.
Some clients will use 802.1x native supplicant and some will be authenticated based on MAB. Not noticed the problem with 802.1x clients but it always occurs on MAB.
I came across a similar issue here: URL
Going of that blog I tried using the "ip device tracking delay probe delay" command but the switches don't recognise the "delay" keyword.
The switches are 3750 switches running version 12.2(58)SE2.
All I have is "count, interval, use-svi" as extra options.
Catalyst 4500 switch guide has "delay" option but no "count, interval or use-svi".
The only way I have managed to avoid the problem is using the second solution which is a registry hack on each client. This is fine for the odd server but not realistic when there will be hundreds of other clients.
We've had issues with our Exchange 2010 server (running on ESXi 4.1) since its default gateway was changed to our new ASA 5510. They manifested as frequent Outlook client connection dropouts or as IP address conflicts whenever Exchange was rebooted. The temporary fix was to disable the Exchange server NIC, bounce the ASA and enable the server's NIC again. We saw poor performance from Exchange after a while again, but after some research and testing I realised that disabling proxyarp on the inside interface fixed the problem permanently.
However I've now realised that the client VPN no longer routes properly because proxyarp is disabled on the inside interface, so I still have a problem.
Recently I had came across 1 issue where one of the server IP had conflicted with VIP of Nexus core switch. The blade server was physically connected to Nexus Distribution switch which in turn connects to Nexus core. Neither Nexus core nor distribution had generate any logs in regards to IP conflict which ideally happens on Cisco catalyst switches. I haven't find any document on cisco as well as on internet for this issue . I dont know what logging need to enable on Nexus for this specific case . There are different logging levels define for every feature like hsrp, ip,monitor etc...
We have Nexus 7k with latest release 4.2(6) Software
BIOS: version 3.22.0
kickstart: version 4.2(6)
system: version 4.2(6)
I've run in to this on 3750G's in a various sized stacks. We apply port security for a mac address on a single port (not existing on more than one port - that's a different issue that appears in multiple posts already).In this case:
1) We do a 'sho mac address-table and see that the device with the mac address in question lives on one port, port 1/0/x.
2) We apply mac port security for this exact same mac address to the same port it is already attached to. switch(config)#int g2/0/2 switch(config-if)#switchport port-security mac-address 001a.1ec8.abcd
3) Get this error: 'Found duplicate mac-address 001a.1ec8.abcd'.We again confirm that that is the only port on the entire switch that has this mac-address.Try the command again, same error.
4) We do a bunch of show commands, get in and out of the switch, go back and then try it again, and now it works, same command, same port and same mac address.
-Aging is default 300
-These are Cisco wireless AP's attached to the switch
-This occurs on different switches with different ports using different mac addresses, always same symptoms.
The company I work for has a small network and it has a windows 2000 server. When the Canon iRC 2880 printer is connected the server gives a error saying that a duplicate name exits in the network. I tried changing the IP address as well. When I changed the IP address of the printer the duplicate IP address moved the new IP address.
View 10 Replies View RelatedI have some question about HSRP in 3750 switch. I have two Cisco 3750 switch which configured HSRP. Let say, we have interface vlan 100 that join in HSRP group member 1. The configuration on both switch is like as follows :
SWI-3750-A (Active)
==========
interface Vlan100
description *** gateway User NPL ***
[Code]....
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.
View 9 Replies View RelatedI am having some troubles with client roaming on a 5508 controller running firmware 7.3.101.0. As soon as a client roams outside the range of an AP they lose data flow and do not seem to transition to another AP for about 1 minute.This is a small network with 6 x AIRCAP3502E-N-K9 AP's (running in H-REAP mode) on the same floor and clients are a mix of HP notebooks, Mac Books, iMacs, iPads and iPhones. There are several seperate SSID's setup and the problem occurs on all. All are WPA2/AES with either a PSK or 802.1X. Both 2.4GHz and 5GHz radios are enabled with auto power and channel selection.
I have tried changing the roaming settings from default and also playing with the AP power settings to no avail.Is this normal behaviour or is there something I can do to improve the reconnection speed?
I have one 5508 with Product version 6.0.199.4 and about 7 Cisco 1140 APs.We have a next problems. Go out of the connection on the clients PC, while physically a wireless connection to the workstations is not broken, but access to network resources is lost and restored after some time (up to about one minute).The logs on the controller at the same time see the following message.
View 3 Replies View RelatedI've just installed a standard Cisco wireless install (5508, 3502i, local and flexconnect setups) all working swimmingly.
The customer has asked for a new WLAN for a particular group of staff that will route to a different gateway than the general wireless staff.
The 5508 is connected to a older Avaya L3 switch that is the customers core swtich, but it isn't capable of PBR so it routes on desitnation only and its default route is not where I need the new WLAN traffic to route to. An ASA will be connected to the Avaya switch (which is the alternate gateway I need to get the new WLAN users to). So my question is probably routing 101, but if the ASA interface, the Avaya swtich and the WLAN interface all reside in the same VLAN, can I give the wireless clients the ASA as their gateway via DHCP and successfully get their traffic to the ASA?
Is it possible to rename the default webauthentication URL from [URL] to something like [URL]. We are running on 7.0.98.0, is it possible to do http for web authentication and https for Mgmt access if we upgrade the controller software?
We configured our guest wireless with no layer 2 authetication so users can associate with an AP and get an ip adress but they can't go anywhere unless they have a valid username and password(web authentication) - does this affect the performance of an AP since there will be many people associated with each AP, is there any setting in the WLC to de associate a client from an AP if its idle for certain time.
I have had several complaints from around the firm where by mobile devices are being bumped off the PSK secured network (All other SSID networks are operating A-OK). Both Android and iPhone devices are being affected, the device will just loop until it reconnects, sometimes up to 20 minutes of trying to establish a connection. It will eventually connect so the key is not the issue.I've attached a debug of a device which fails to connect and then shortly after is successful.
Controller 5508 v7.0.116.0
AP 3502i IOS 12.4(23c)JA2
I have an environment of Cisco 5508 Wireless Controller and 1142N Access Points. I have a problem with the ratio of concentration of clients connecting to Access points in floors.
Recently I have been turning off 802.11a on the access points and I am seeing increase in client count in a few of acces points.What is the maximum client count supported by these access points and how do i ensure they are distributed evenly on access points?
Since two months they work full time with the new Dutch Electronic Patient Dossier.We installed 3 Cisco 5508 controllers, version 7.0.230.0 last year on a HP-switched network on a layer 2 mobility domain.Cisco 1041 AP are
The personnel works woth thin clients url... The one with the double antenna.This client has a Broadcom BCM943228HM4L 802.11 a.b.g.n (2x2) adapter.
On the client they have a connected RDP session to a server with the documents.Now they are walking from one patient to another patient. The problem they experience is a very late roaming. At the beginning of the corridor, the client will associate, but is going to roam at the end of the corridor. We installed 4 AP's on each corridor, so they signal is very well, maybe to well?
I disabled client loadbalancing and band select.The lowest data rates are also disabled. Mandatory begins at 12 Mbps. I can increase this to 18 Mbps.These clients work with PSK, with both methods (WPA-TKIP and WPA2-AES) enabled.We did this because of many old and new clients.
The customer tried to find out the problem with a smartphone, same issue. Very late roaming.I can upgrade the WLC to 7.0.240.0. The only problem I have is the WCS. When upgrading to 7.2 and higher I need to have NCS.
recently I installed WLC 5508 en the central office and installed a network mesh in a remote office; central and remote office is connected with serial link as WAN, and I have dhcp server in the remote office for give ip address to all users and devices in the remote office. Additional I have 5 LAP1552 (mesh) and 2 LAP1260 in the remote office, all clients that connect to LAP1260(this don't belong to the mesh) receive ip address from dhcp server, but neither client that try to connect to the mesh (LAP1552) receive ip address from dhcp server. I don't have if I doing some thing bad. The range IP that receive the all ap's belong to the network of devices and the range ip for the users belong to network of users.
View 12 Replies View RelatedI am having trouble with a newly configured install. Basically it seems that my centrally switched guest SSID is not functioning. As you change AP groups, which should change the interface associated with the SSID and also the dhcp client address, the client is retaining the original dhcp address from whichever AP group they first associated with.
I also have a locally switch WPA2 SSID at each location which is working fine. Clients are able to change dhcp address correctly as they move between AP groups. It just doesn't seem to be working on the guest network, which is odd because it was working earlier in the install. It has only started having issues yesterday afternoon.
The interface above is assigned to the guest SSID in one of the AP group. I assume this has something to do with it but I've been over my DHCP assignments on the core switch, local switch, controller, and dhcp server and can find no issue with the configuration..
I am not sure why as I am not using DOT1X at all. The guest is a pass-thru and the WPA2 network is just WPA + WPA2 with TKIP and AES. No DOT1X anywhere on the controller...
Background: Wireless credit card machines can't stay connected to the 5508 controller 7.0.116 / 1142 ap wireless system. MAC address of one of the wireless hosts is 00:12:0e:ec:ce:97. AP servicing them is d4:a0:2a:99:34:60. Hosts are able to connect to the network after a reboot and stay connected for random periods of time but then don't come back unless you manually reload them. I have 3 in total in the same room services by the same ap.
I have the output of debug client 00:12:0e:ec:ce:97. Output showed 802.1x 'timeoutEvt' Timer expired for station 00:12:0e:ec:ce:97 so I increased the value to 4000ms on the controller but am still having the issue.
Note that the output below is the state the client stays in after receiving the timeout (802.1x 'timeoutEvt') showing subsequent attampts. The only way to get them back on is a reload of the credit card machine.
[Code]........
I have been noticing in my trap logs that there are an excessive amount of Client Association/Authentication Failures. I cannot figure out why. I have a Cisco 5508 WLC with 81 AP's (1131ag, 1142abgn, 1262N) models. The wireless devices are on a Windows Domain and use 802.1x EAP authentication, authenticating the user and computer info with a RADIUS Server. I look at the logs and all it can tell me is Reason:Unspecified ReasonCode:1. I read that the Reason Code is due to "Client associated but no longer authorized" but to be honest I am not sure what that means.
View 9 Replies View RelatedWe use WLC 5508 with 7.4. We tried to set max allowed clients per AP radio to 30 through GUI. We have APs with 80 clients associeted though.
When entering config wlan max-associated-clients max-clients wlan-id we got
"WLAN/Guest-Lan/remote-lan is enabled. disable to configure max associated clients."
GUI doesn't show that message, should it? In GUI, Is it necesary to disable WLAN before too?
Installed a new 5508 WLC last week, and finished bringing 68 new 3602i access points online in our College Dorms. We are seeing a lot of "Client De-authenticated" errors "Reason: Unspecified Reason: Code 1. Years ago I asked about error code 1. The reply from Cisco was: "The programers put the code in. It basically means we don't know what the problem is."Got a call from one of the dorms stating that students were getting knocked off the network while going to sites. If a student is wired, network is solid.Walked the dorm in question and was getting full bars of signals at all times, and was able to stream a movie from my Ultraviolet account without any break or slowdown as I moved from access point to access point. So.. my device, an iPad, was fully mobile and did not experience any disconnects.Did observe one student using a MacBook Pro. This student was constantly loosing connection to the access point. Checked the controller for the MAC of the student's computer. I did find deauthentication errors. BUT... this student's error was the computer was receiving an IP address from the DHCP that was already in use. At the computer the error message was a timeout issue.I am just learning the ropes on the 5508. Have used 3 4404s for the past six years.
View 2 Replies View RelatedUser 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.
I have setup the WLC to authenticate to a MS Server2008 NPS for a WPA2/AES SSID. The connection is successful, but client authentication fails for wrong EAP-type. I believe this indicates a Windows7 client issue. What is the required client setup to satisfy the MS NPS?
View 8 Replies View RelatedI've got a setup like this:
WLC 5508 v7.0.98
6-7 Autonomous upgraded to lightweight APs - 2 * 1231G while the rest are 1242AG
3 dynamic interfaces, 2 to Corp (diff VLANs) and 1 to Guest
4 WLANs binded to different interfaces
2 to the Corp interface Vlan X
1 to Guest
1 to Corp Vlan Y
DHCP for Corp is provided by their own Win DHCP server while controller is the DHCP server for Guest. Lease time is 1 day.
My problem now is, some clients, at random, loses their IP after being connected to the network. They get a 169.254.x.x. They connect to the Corp network OK, no browsing issues but after a while, they lose their IP address.
They can either wait for a while before getting an IP back or just simple renew their IP on their machine.
I've tried increasing the threshold values in the Local EAP to double its default values and also setting the WLAN session time out values to infinite. However, these 2 didn't work. I'm still having clients that occasionally lose their IPs at random.
I've also noted that this affects clients with WZC wireless drivers and not others e.g. Intel Proset.
I would like to be able to allow a specific client to only associate at 6mbit/s -is this possible using the wlc controller 5508? Another option would be to limit a whole w lan ssid to 6mbit/s but i can't find a way to do that either.
Other w lan ssid's on the same access points/controller need full data rates, so i guess i can't use the RF-profiling for this.
I have a strange issue with clients connected to a WiFi network.I have configured AP in FlexConnect mode and 2 SSID's. After a reboot of the AP the network is stable for almost 45 mins. Then each client will go UP and Down, mostly with a delay of 5 mins.
What could be the source of this. The clients are Windows CE handheld with fixed IP adres. I already configure persitent client and have play arround with APR timers as well. Thereby an Windows desktop or an iPad has less connectivity issues but even they expert pakcteloss once in severall minutes.
Session timer is turned off
The iPad for example can play music, but each 5 mins you hear a little hickup and 2 subsecond ping are loss.
Controller version is 7.3
I am using guest solution with two WLCs , one inside and one as anchor in DMZ.we have also NAC guest server to authenticate the guest users. inside WLC is 5508 and had been updated to latest version 7.2.103.0 last Thursday.
now we facing problem with the guest SSID , after the user authenticate, immediately disconnected and to access again he has to authenticate again and so on.
Is there any Bug with the new version because the setup was working fine before upgrading.
I have two wlc 4402 to control 50 AP 1131. 2 WLC: wlc-01 and wlc-02, wlc-02 config as backup wlc in the same mobility group. Client authentication:EAP with Microsoft IAS/AD.All AP have joined wlc-01. Wireless client work well with wlc-01.For testing I config access point AP01 have primary wlc: wlc-01, secondary: wlc-02 If I change config of AP01 like this: primary wlc: wlc-02, secondary: wlc-01. Client is hard to connect to wlc-02 and it only connect when client set static ip ALL wlc run this softwar image: 7-0-98-0 Should I send wlc-02 to warranty service?
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