As mentioned earlier I would post my wireless configuration of the Cisco 877W router as soon as I got it to work the way I like. In this setup the commonly used IRB bridge option is not used. This configuration will also work on the 857W model.

! dot11 ssid vlan 2 authentication open authentication key-management wpa guest-mode wpa-psk ascii 0 ! no ip dhcp use vrf connected ip dhcp excluded-address ! ip dhcp pool wireless network default-router dns-server ! interface Dot11Radio0 no ip address ! encryption vlan 2 mode ciphers tkip ! ssid ! 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 54.0 channel least-congested 2412 2442 2462 station-role root no cdp enable ! interface Dot11Radio0.1 description WLAN vlan2 encapsulation dot1Q 2 ip address ip nat inside ip virtual-reassembly no cdp enable ! interface Vlan2 no ip address !

On the (outside) dialer0 interface I had to add the following line to enable NAT:

ip nat outside

And at last you’ll need the next ip nat and access-list lines to make it work:

ip nat inside source list 103 interface Dialer0 overload access-list 103 remark Traffic allowed to enter the router from the WLAN access-list 103 permit

You can use the show dot11 or debug dot11 commands to troubleshoot. For example, the following output displays a associated device:

router#show dot11 associations 802.11 Client Stations on Dot11Radio0: SSID [] : MAC Address IP address Device Name Parent State xxxx.xxxx.xxxx unknown - self Assoc router#

Enjoy being wireless!