radius-server local
  nas local
    key ascii-text encrypted 8CB5107EA7005AFF
    network 127.0.0.1/32
  exit
  nas ap
    key ascii-text encrypted 8CB5107EA7005AFF
    network 192.168.1.0/24
  exit
  virtual-server default
    proxy-mode
    nas-ip-address 10.10.10.1 
    upstream-server eltex
      host 10.10.10.12
      server-type all
      key ascii-text password
    exit
  enable
  exit
exit

wlc(config)# wlc