CISCO IOS Command(tunnel)

r1(config)#int tunnel 0
r1(config-if)#?
Interface configuration commands:
  access-expression       Build a bridge boolean access expression
  appletalk               Appletalk interface subcommands
  arp                     Set arp type (arpa, probe, snap) or timeout
  backup                  Modify backup parameters
  bandwidth               Set bandwidth informational parameter
  carrier-delay           Specify delay for interface transitions
  cdp                     CDP interface subcommands
  clns                    CLNS interface subcommands
  crypto                  Encryption/Decryption commands
  ctunnel                 CLNP tunneling
  decnet                  Interface DECnet config commands
  default                 Set a command to its defaults
  delay                   Specify interface throughput delay
  description             Interface specific description
  dspu                    Down Stream PU
  exit                    Exit from interface configuration mode
  fras                    DLC Switch Interface Command
  help                    Description of the interactive help system
  hold-queue              Set hold queue depth
  ip                      Interface Internet Protocol config commands
  ipx                     Novell/IPX interface subcommands
  isis                    IS-IS commands
  iso-igrp                ISO-IGRP interface subcommands
  lan-name                LAN Name command
  lat                     LAT commands
  llc2                    LLC2 Interface Subcommands
  load-interval           Specify interval for load calculation for an
                          interface
  locaddr-priority        Assign a priority group
  logging                 Configure logging for interface
  mac-address             Manually set interface MAC address
  max-reserved-bandwidth  Maximum Reservable Bandwidth on an Interface
  mtu                     Set the interface Maximum Transmission Unit (MTU)
  multilink-group         Put interface in a multilink bundle
  netbios                 Use a defined NETBIOS access list or enable
                          name-caching
  no                      Negate a command or set its defaults
  ntp                     Configure NTP
  rate-limit              Rate Limit
  rmon                    Configure Remote Monitoring on an interface
  sap-priority            Assign a priority group
  service-policy          Configure QoS Service Policy
  shutdown                Shutdown the selected interface
  smrp                    Simple Multicast Routing Protocol interface
 --More--
03:38:32: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to down
                          subcommands
  sna                     SNA pu configuration
  snapshot                Configure snapshot support on the interface
  snmp                    Modify SNMP interface parameters
  tarp                    TARP interface subcommands
  timeout                 Define timeout values for this interface
  traffic-shape           Enable Traffic Shaping on an Interface or
                          Sub-Interface
  transmit-interface      Assign a transmit interface to a receive-only
                          interface
  tunnel                  protocol-over-protocol tunneling
  tx-ring-limit           Configure PA level transmit ring limit
  vines                   VINES interface subcommands
  xns                     XNS interface subcommands