topic Client Stuck in DHCP_REQD state in Wireless

Client Stuck in DHCP_REQD state

ThomasPemberton — Sun, 04 Jul 2021 03:39:39 GMT

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.

See attached logs, let me know if you need any more info on my setup!

Thanks

~Tom

Client Stuck in DHCP_REQD state

weterry — Fri, 02 Sep 2011 00:13:21 GMT

In the first debug that I looked at, the WLC has no indication that the client is sending a DHCP Discover/Request.

We see it pending dhcp (DHCP_REQD does not mean the wlan has dhcp required, it means we are waiting to learn the clients address).

Anyhow, if this is an Open Wlan (no encryption at all?) then I can't think of any reason we wouldn't be missing the dhcp request, unless the client wasn't sending it....

I'll try to dig deeper in the logs later tonight to see if anything else is odd.... Any chance rebooting the TV does any good?

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 00:41:31 GMT

I unplugged the TV for a few minutes and started it back up when I was testing, no luck... I'm new to my job and still learning but from reading through Cisco's documentation I came to the conclusion too that it was never even getting to the point of making a DHCP request... I let the first log run for a while and noticed at the end it just seems to be looping through the same few steps over and over... I am going to do some more testing tomorrow with that client and putting another wlan on that AP, try to narrow down some more what is the problem. After reading through some other similar posts it seems like some people narrowed it down to certain wireless chipsets in devices...not sure what this one is in the TV...

Client Stuck in DHCP_REQD state

George Stefanick — Fri, 02 Sep 2011 13:31:14 GMT

Do you have a firewall between these two devices? Does the apple tv screen sit on "setting time" ?

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 14:04:35 GMT

No firewall, it is a Vizio brand TV with wireless (for netflix, hulu, etc)

Client Stuck in DHCP_REQD state

larnelhight — Fri, 02 Sep 2011 15:00:06 GMT

Do you have Client Band Select checked? I had a similar problem and had to uncheck it until the manufacturer released newer network drivers. This was for a Mac Pro.

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 15:15:19 GMT

Client band select is not enabled on this WLAN

Client Stuck in DHCP_REQD state

George Stefanick — Fri, 02 Sep 2011 16:12:44 GMT

The last issue I had with an apple tv was that the dam thing wanted to go out to the internet and get NTP time.

What is your security again ? None right ?

All other clients work fine right ..

TV is SET FOR DHCP, right?

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 16:16:11 GMT

Once the MAC is registered on our system, we have no encryption, webauth, etc on our wireless. When I was testing this there was about 10 other clients on the AP with no problems. TV was set for DHCP.

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 16:51:37 GMT

debugging a client that works, it seems to break at the very last step of the PEM, sending an XID frame...on the client that works :

*pemReceiveTask: Sep 02 11:30:12.577: 00:19:d2:6b:0c:f4 0.0.0.0 Added NPU entry of type 9, dtlFlags 0x0

*pemReceiveTask: Sep 02 11:30:12.577: 00:19:d2:6b:0c:f4 Sent an XID frame

*DHCP Socket Task: Sep 02 11:30:13.606: 00:19:d2:6b:0c:f4 DHCP received op BOOTREQUEST (1) (len 308,vlan 27, port 13, encap 0xec03)

broken client:

*pemReceiveTask: Sep 01 15:18:19.646: 00:19:9d:6a:09:6d 0.0.0.0 Added NPU entry of type 9, dtlFlags 0x0

*apfMsConnTask_4: Sep 01 15:18:32.812: 00:19:9d:6a:09:6d Association received from mobile on AP 8c:b6:4f:c8:b1:90

(loops back to start of process)

Client Stuck in DHCP_REQD state

George Stefanick — Fri, 02 Sep 2011 16:55:36 GMT

So the broken client stops right as asscoaition received and nothing else comes after that ?

What are your PHY rates set at ... what is mandatory and supported ?

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 17:17:10 GMT

probably a dumb question, but where would i check that?

Client Stuck in DHCP_REQD state

George Stefanick — Fri, 02 Sep 2011 17:24:25 GMT

no worries ... we are here to help ..

On the WLC main page ... click on wireless... then on the left you will see 802.11b/g/n (bottom lower one). Then click on network ... take a sreen shot of that for me ..

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 17:29:51 GMT

Client Stuck in DHCP_REQD state

George Stefanick — Fri, 02 Sep 2011 17:36:50 GMT

I dont know if this is your issue, BUT we could try it ... Make 1 mandatory... and 5.5 supported and see what happens.

Also, can you do a complete debug from the Apple TV ...

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 17:39:14 GMT

User is gone today, but Tuesday I am going to stop by again, Will give that a shot. I attached to debugs from the controller in my first post (debug client xx:xx:xx:xx:xx:xx)...is there some other method of debugging that I should try?

Client Stuck in DHCP_REQD state

daviwatk — Fri, 02 Sep 2011 17:40:00 GMT

Can you post the exact model of this TV so, perhaps, we can determine exactly what specs it's WiFi connection has.

Client Stuck in DHCP_REQD state

George Stefanick — Fri, 02 Sep 2011 17:42:18 GMT

I have notes from my t/s with the NTP issue. And i have it mentioned 1 PHY rate needs to be mandatory. I have 1 mandatory on my lab and its working.. Im not in front of my lab to test at the moment.

But that is a difference between your set up and mine ...

Client Stuck in DHCP_REQD state

ThomasPemberton — Fri, 02 Sep 2011 17:42:34 GMT

+ TV Make/Model: Vizio

E3D320VX

+ Firmware Version: 1.22.8.0874 (Latest version from Vizio

)

Client Stuck in DHCP_REQD state

George Stefanick — Fri, 02 Sep 2011 17:48:08 GMT

looking at your debug ... not sure its the man rates... but still good to try ... also do you have aironet extentions enabled? if so you might want to disbale them.