Cisco Wireless :: 6500 - DHCP Client Not Getting Address
Oct 31, 2012
Currently we're providing DHCP to wireless clients from a dhcp pool on a cisco 6500. Due to new requirements we need to move to windows 2008 dhcp and when I test this on an unused WLC (7.0.235.0) the client doesn't get an address.
When I do a packet capture on the client I see it requesting dhcp but not getting any response from the server. When I do a dhcp debug on the client I see the same (see attached file).
This seems to me to be a server issue but the same server is supplying addresses to wired clients.
The wireless client can't get the DHCP address when I enable the On-MAC-Filter-failure, MAC Filtering and Web Auth. Client can get the DHCP address when I only enable the Web Auth in the same WLAN SSID. The WiSM verion is v7.0.235.0. [code]
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.
Version 12.2(33)SXI int vlan 1 description client vlan ip vrf forwarding A ip address 10.1.1.1 255.255.255.0 standby 129 ip 10.1.1.2 standby 129 timers 1 4 standby 129 priority 105 standby 129 preempt ip helper-address 10.1.2.20
[code]....
dhcp requests are not making it to the dhcp server SAME VRF (ip helper-addres is not doing anything.....)extended vrf traceroutes on udp 67 sourced from vlan2 are fine
I am expecting udp unicast packets on port 67 "giaddr" relay packets on the DHCP server generated and sourced by the relay on Vlan1
eg. Mar 1 01:59:06.731: DHCPD: setting giaddr to 10.1.1.1
This exact setup works in our preprod environment with the same code.Only difference is we run Distributed etherchannel on the 6500's where this doesnt work.
Wireshark on the client I can see the requests being sent Going to check it with debug ip dhcp server to check the relay logs out of production hours.
I have seen so many people say it IS and ISN'T supported on this version of the code.e.g. [URL]
I am aware the helper-adddress should inherit the vrf of the interface ip helper-address vrf command is not supported.The fact it works in the PP environment.... could this be due to the Distributed EtherChanel difference? or just some bug....
I have DHCP server running in windows 2003. Presently its unable to provide Ip address for VPN clients who connect remotely. What I should do / reconfigure in DHCP, so that the DHCP server provides address for VPN clients.
I keep getting some additional IP addresses logging onto my home network that have an address outside what should be allowed by the router. The server is running at 192.168.2.1 and is set to only allow clients from 192.168.2.2 - 192.168.2.10 so a total of 9 clients should be allowed on.The problem is that something keeps logging in with an address of 192.168.169.2 or 3 etc. Sometimes more than one device at a time.I have assumed that it is some automated or virtual client as I'm pretty certain my network has not been breached. I have a 9 character password with a relatively random alphanumeric combination, although I haven't tried changing the password (I live in a share house with with a bunch of devices using wireless, so I haven't yet bothered). What I don't understand is how it has connected with the xx.xx.169.xx range at all. I have a Belkin 'Share' Wireless N Modem Router and at some stage there was a 'guest' network but that has since been disabled and I still am seeing the extra address. I have attached a screen shot of the DHCP client list on the router.The following is a list of devices that may be on the network at times, I'm thinking one of these may be responsible for the problem:
Windows Vista Desktop - Only LAN device PS3 Macbook Epson wireless printer Android HTC Desire Mobile Phone Laptops running various Windows versions (XP, Vista and 7)
A few thoughts I had:
- the android phone is capable of running a wireless hotspot, may have to look into it to see if if has been operating as an access point into the Belkin router, but assumed this wouldn't bring up clients connected to the phone on the home router.
- The desktop has PS3 Media server installed to stream video to the PS3 over the network (not that I have ever managed to get it to work), however this is not ever open on the desktop.
DHCP enabled with default settings. Dynamic IP range from 192.168.0.100 - 192.168.0.199.Router shows laptop with 192.168.0.199 however when I check the IP on laptop I have 192.168.100.10 and both laptops are connected on my SSID with 90% signal strenght.
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.
I'm trying to do some basic troubleshooting on our WiSMS. Some clients on a working network are unable to connect in the afternoons, debugging the client on the wism shows this message:
*apfMsConnTask_2: Dec 05 14:23:44.018: Association request from the P2P Client Process P2P Ie and Upadte CB
It keeps repeating with the Task_X changing.What does that mean?We have two controllers in our 6500's running this software ver. 7.3.101.0
Setting up a multi floor WLAN using a 6500 WISM Controller. Each floor has an AP group with the floor WAPs assigned. Each floor has a VLAN and the WLC has an interface configured. Each floor has a WLAN configured with the same SSID and the only change is the interface on the WLAN per floor.DHCP is remote on AD servers and each floor as a scope configured.Each floor works fine - we can get connected and get assigned to correct IP address. The issue we had with this setup was moving between floors. When we move up a floor the client loses connection to the inital floor (coverage - as expected). if we disconnect and reconnect it connects to the new floor SSID and gets an IP from DHCP.When looking into this - I then created an interface group and added all the floor interfaces into the group. I then applied the interface group to each floor WLAN and did soem testing - it worked as expected. I could now move between floors.The issue with this is though. When I was testing I already had an IP address assigned from DHCP - before I changed to interface groups. The issue is that the intial DHCP assignment no longer works and we cant connect to the WLAN anymore,
I have the ea6500 and was wondering what the DHCP server is for? I turned it off and everything seems to be able to connect without it. Am I missing something? Also, when I disable clone my pc's MAC addy, I can't connect to the internet. (My computer is hard wired to the router).
I have intergrated wlc module in 2800 series cisco router, switch, cisco 1130 lightweight access point, i configured dhcp on router for wireless client, deal is that AP taking ip address from router its ok, but client cannot take dhcp, what im doing wrong? here is configuration of wlc router and switch
My AP get IP from 6509, but client cannot get dhcp from my dhcp pool for client, what is the reason?i have 3750g switch with integrated WLC, i connect it to 6509 I did all configs yesterday here is outputs
WLC Interface Name Port Vlan Id IP Address Type Ap Mgr Guest -------------------------------- ---- -------- --------------- ------- ------ ----- ap-manager LAG 10 172.16.10.100 Static Yes No globus LAG 20 172.16.20.254 Dynamic No No management LAG 10 172.16.10.99 Static No No service-port N/A N/A 0.0.0.0 Static No No
I am trying to configure the Wism running on a 6500 switch.... I have configured the DHCP scope for the AP on the controller itself with the same subnet as of the management for the controller. The AP gets the IP but once it restarts it doesn't register to the controller, this is the log i get on the AP when consoled into it. [code]
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.
I have ten E4200 routers deployed in five library branches. In recent months, the E4200's in two branches have occasionally gone into a state where they are not always providing an IP address to both wired and wireless devices. Some devices will get an IP fine and others will not, The problem seems to move and the next day the same device will connect fine and others will not. A reset of the router usually clears the problem but it is becoming more frequent and bothersome. For some reason only two locations are effected.
Some notes:
- Firmware version is 1.0.02 build 13
- When I set devices up with static IP's they work fine, so the problem seems to be related to the DHCP service
- The WAN side of the network tests fine with no issues
- I've had these routers deployed for over a year and this problem just started in the past two months
- Routers and AP's are on different channels to prevent interference
- No nearby WiFi signals appear to be casuing any interference
I just got an EA3500 and I guess I don't understand what "Refresh" does when viewing the DHCP client table under the "Status", "Local Network" tab of the web interface, either that or it's not working. If I have active wired and wireless clients and I power off the EA3500, wait a few minutes, then power it back on, the table is blank. If I hit "Refresh" I would expect it to re-populate the table with the connected clients. For whatever reason, it doesn't. I have to physically disconnect and reconnect the E-net cable, or power cycle the wireless client to get them to reappear in the table. Is something wrong with the router or its s/w
My EA4500 will periodically clear out the DHCP Client Table and I will lose internet access.This happens once almost every day, normally in the morning. If I can't access the internet I will check the DHCP client table under Status -> Local Network -> DHCP Client Table and it is always empty.After I select Setup -> Reboot it will work again - when I look at the DHCP client table it is now populated with all my devices. I am on firmware version 2.0.37.
I have purchased E2500 and i am having following problems:
1. DHCP client list not showing - only shows when i reboot the router. After some time, the list never shows even when i press refresh button 2. I can only reserve IP when i reboot the router - after some time i cannot do this action also
I have upgraded to latest firmware and also peformed reset as directed by support.
I just purchased an E4200 router. I have four clients on my network and they are all set up for DHCP. I renewed their IPs and they all are connected. "Cisco Connect" reports that I have four clients connected. When I access the router and bring up the DHCP Client Table, there are no entries. There should be four entries. Aftern I enable the logging function, none of the logs have any data in them even after I wait for 45 minutes and use the internet and renew IPs. I am using Firmware Version: 1.0.03. I have the same results for both Chrome and Firefox. I want to be able to set Static IPs but I am hampered by the not having any clients in the DHCP client table.
I'd like to add a name to a few ip addresses in the DHCP client table currently there is an asterix for a couple client names. the router is an ea3500.
I have DHCP enabled, but I have assigned a static IP to most of my network devices.When I click on the DHCP Client Table, most of the devices are NOT shown even though I know they are connected and working.One device (a Brother printer) that I have assigned a static IP to actually shows up as having an IP from the DHCP range. A Panasonic TV does not show up at all even though it is connected and woking. I have not been able to assign a static IP to it because it does not show up.
Region : France Model : TD-W8968 Hardware Version : V1 Firmware Version : TD-W8968_V1_120926 ISP : SFR Device in question: siemans C610 IP voip phone Configuration:
* The C610 is directly connected to TD W8968 via the ethernet port number 3 >> ethernet port number 1 is connected to the devolo homeplug 200AVPLUS . The PC is at the other end of the homeplug network
* The DHCP address starts at 192.168.1.100 - 192.168.1.199.
Symptom:
1. It takes a long time (about 2-3 minutes) for the C610IP to obtain the IP address of 192.168.1.100 after the synchronisation of the ADSL line is finished 2. In the DHCP client list, I could only see the IP address of the PC (192.168.1.101) but not the C610 IP. However, if I type 192.168.1.100, I could access to the configuration page of the C610 IP. - I only managed to see the C610IP once in the DHCP client list.
I tried to unplug -> replug the router but to no avail.
I have an intermittent issue getting a DHCP address when using a Cisco Wap 200. Sometimes i can get an address but most of the time my devices fail. This happens with / without WPA or WEP.
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?
I have a Linksys WRT310N v1 with firmware v1.0.10 build 002Jul 19, 2010 My router fails to renew it's DHCP lease from my cable provider, causing internet access to drop. I can still access my cable modem at 192.168.100.1, but I must do a "IP Address Release" then "IP Address Renew" to get back internet access. The router works fine otherwise.
When I enable IPv6 on my E4200, the Windows 7 DHCP client crashes. It also seems to crash the audio service, the event logger and a few other windows services.
Region : UnitedStates Model : TL-WDR4300 Hardware Version : V1 Firmware Version : 3.13.23 Build 120810 Rel.44064n ISP : Comcast
So I've been checking my router DHCP list and I usually use the WPS feature to add devices. I know how many devices I have and which ones are wireless etc. I've made address reservations on all the devices that I have and know of. One feature that really frustrates me (which is missing) is no way to rename a device. My iPhone is named: Reggie's iPhone yet the 4300 picks it up as Unknown... I dont understand why. I've renamed it on the iPhone to different things and restarted it but still it comes up as that. I have 2 Nexus 7s and both come up with wierd names, one is for my wife and one is for me and I wish there was a way to name it proper.
Question is: Will the name edit feature ever get added to it? I dont get why it's not there now, it's not really something major (I have a 5 year old router that even has that... and it cant even support N). It's really frustrating to have to guess and check the devices on my network because most of them come up as unknowns.
Right now I'm trying to located another device that's coming up as unknown and now matter how much I try, since the router lacks any feature to assist finding it, it's really frustrating.
something else i noticed: my DHCP List shows all the devices connected with their IP addresses, yet I went into CMD and was doing a random ping command. I'm able to ping 192.168.0.114 with perfect stats back yet on my DHCP List it shows the highest IP is at 192.168.0.112.... Is something wrong here? Is it supposed to not pick up the IPs it gives out? And of course since there isnt a way to tell if that IP is for a WIFI or ethernet device, I have no idea what that device is...
yet i found another ip address on my network by using the ping command. actually I went ahead and did arp -a to find out all the ips with mac addresses. this is a serious flaw with the security of this router!!
Our client has MPLS connected all sites. Each site has a router connected to MPLS via serial interface, and connected to the switch (6500) via ethernet interface. There is QoS applied on the serial interface for outbound.
It appears there are lots of inbound traffic coming to the site, and the client applied QoS on outbound.What I learned that after the packet are marked by the CPE, the ingree Provider Edge Router (PER)uses these marking to map flows to various Label Switched Paths (LSPs) providing differentiated treatment accross the network. Then at egree, the PER applies queuing policying based on the CPEs orginal DSCP markings to properly allocate bandwidth on the egrees link during congestion. My guess we really don't need to have inbound policy applied in the serial interface on the router, am I correct?
The serial interface has 1.5 MB, and the goal is we want to have 1 MB for cirtical apps, and 0.5 MB for download/upload internet access. If we apply this policy on the switch, A) should I apply it on the VLAN interface or the port connected to the router?
