R1(config)#ip dhcp ?
  aaa                        Configure aaa attributes
  binding                    DHCP address bindings
  bootp                      BOOTP specific configuration
  conflict                   DHCP address conflict parameters
  database                   Configure DHCP database agents
  excluded-address           Prevent DHCP from assigning certain addresses
  limited-broadcast-address  Use all 1's broadcast address
  ping                       Specify ping parameters used by DHCP
  pool                       Configure DHCP address pools
  relay                      DHCP relay agent parameters
  smart-relay                Enable Smart Relay feature

R1(dhcp-config)#?
DHCP pool configuration commands:
  accounting           Send Accounting Start/Stop messages
  bootfile             Boot file name
  client-identifier    Client identifier
  client-name          Client name
  default-router       Default routers
  dns-server           DNS servers
  domain-name          Domain name
  exit                 Exit from DHCP pool configuration mode
  hardware-address     Client hardware address
  host                 Client IP address and mask
  import               Programatically importing DHCP option parameters
  lease                Address lease time
  netbios-name-server  NetBIOS (WINS) name servers
  netbios-node-type    NetBIOS node type
  network              Network number and mask
  next-server          Next server in boot process
  no                   Negate a command or set its defaults
  option               Raw DHCP options
  origin               Configure the origin of the pool
  subnet               Subnet allocation commands
  update               Dynamic updates