Chapter 6 Deploying Wireless Networks for FortiOS 5.0 : Wireless network monitoring : Monitoring rogue APs : Configuring rogue scanning : MAC adjacency
  
MAC adjacency
You can adjust the maximum WiFi to Ethernet MAC difference used when determining whether an suspect AP is a rogue.
To adjust MAC adjacency
For example, to change the adjacency to 8, enter
config wireless-controller global
set rogue-scan-mac-adjacency 8
end