Option 1: WIFI and LAN interface with different IP addressing
Option 2: WIFI and LAN share same IP addressing (AP)
https://sites.google.com/site/jimgwiki/other-stuff/configuring-a-cisco-877w-router
http://www.cisco.com/en/US/docs/routers/access/1800/wireless/configuration/guide/s37chan.html
Notes: when change from A to B, you might have to re-configure the SSID settings:
dot11 ssid <<your SSID>>
authentication open
authentication shared
authentication key-management wpa
guest-mode
wpa-psk ascii 7 <<your passcode>>
!
