Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 
Community Member

Wireless DHCP

Hi, I am trying to get my 870 router to assign DHCP addresses to wireless clients. The wired LAN works fine. If I assign a static address to my laptop it seems to work fine. Just not DHCP.

I have posted my config.....

Any comments appreciated


Re: Wireless DHCP

Nicholas, the problem I see is that you are using a second vlan, and you do not have it defined in the router. Try this:

interface Dot11Radio0

no ip address


encryption vlan 2 mode ciphers tkip


ssid Home

vlan 2

authentication open

authentication key-management wpa

wpa-psk ascii xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0


station-role root

bridge-group 1

bridge-group 1 subscriber-loop-control

bridge-group 1 spanning-disabled

bridge-group 1 block-unknown-source

no bridge-group 1 source-learning

no bridge-group 1 unicast-flooding


interface Vlan2

description Wireless

no ip address

bridge-group 1


interface BVI1

ip address

ip nat inside

ip virtual-reassembly


Added a VLAN2 interface that is in bridge group 1, and set the SSID to be in vlan 2, also changed the encryption command to encrypt vlan 2.

HTH, Steve ------------------------------------------------------------------------------------------------ Please remember to rate useful posts, and mark questions as answered
Community Member

Re: Wireless DHCP

In the conf mode on router run the is helper command & give the ip address of the dhcp server.


Re: Wireless DHCP

You should remove "ip nat inside" from vlan 1 config and put "bridge-group 1" under vlan 1 config.

CreatePlease to create content