dhcp server lease list (lists the current DHCP clients)
dhcp server lease delete clientid=xx:xx:xx:xx:xx:xx ( xx etc. is the MAC address of appropriate client from above list – deletes the current lease)
dhcp server lease add clientid=xx:xx:xx:xx:xx:xx pool=LAN_private addr=192.168.1.x leasetime=0 (adds required IP for appropriate client with infinite lease time)
saveall