02-16-2010 08:33 AM - edited 07-03-2021 06:31 PM
I currently have an issue with a 7921G phone which authenticates with the access point ok but is showing DHCP timout on the phone itself
Our setup is as follows a Cisco 4400 Wireless Lan controller, a 4510 chassis based switch which supplys dhcp range for IP telephony and this is setup on the lan controller as dhcp relay
There is a binding shown on the switch for mac to ip adress but somehow this is not filtering through to the phone
The phone also shows on the client detail on the nearest access point but i have noticed that policy manager state is showing Dhcp_reqd
I would appreciate help with this very much
Thanks
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02-16-2010 12:32 PM
Do you have DHCP required unabled under the WLAN? You shouldn't have it enabled on the WLANs being used by the 7921's. The phone doesn't re-DHCP with every layer-2 change so the phone can get stuck in DHCP_Req after a roam.
02-16-2010 12:32 PM
Do you have DHCP required unabled under the WLAN? You shouldn't have it enabled on the WLANs being used by the 7921's. The phone doesn't re-DHCP with every layer-2 change so the phone can get stuck in DHCP_Req after a roam.
02-17-2010 01:17 AM
Thank you for your response it cured the
issue
02-17-2010 09:06 PM
For your further reading i posted info my site about this subject
http://www.my80211.com/voip-labs/2009/12/31/wlc-dhcp-address-assignment-required-option.html
02-26-2010 12:27 AM
This worked worked for about a week and now we have the same issue, When I saw we had issues again with the phone showing configuring IP I looked at the controller and saw the option for DHCP Addr, Assignment had been checked again and I know, no one else has access to the controleller so now im thinking im going crazy lol
I then unchecked the box again and when you look at client detail the policy manager state is showing DHCP_Reqd even though when you look at CLI it definitely shows disabled
Please can some one helpo restore my sanity
Thanks
Mark
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