Command Help

Enter a question mark (?) or a tab in any command mode to display the list of commands available in that mode.

device(config)# ?
  aaa                        Define authentication method list
  access-list                Define Access Control List (ACL)
  aggregated-vlan            Support for larger Ethernet frames up to 1536 bytes
  alias                      Configure alias or display configured alias
  all-client                 Restrict all remote management to a host
  arp                        Enter a static IP ARP entry
  arp-internal-priority      Set packet priority
  arp-subnet-only            Only learn ARP in the subnet of this device
  authentication             Configure flexible authentication
  banner                     Define a login banner
  batch                      Define a group of commands
  boot                       Set system boot options
  (output truncated)

To display a list of commands that start with a specified character, type the character followed by a question mark (?) or a tab.

device(config)# e?
  enable                     Password, page-mode and other options
  end                        End Configuration level and go to Privileged level
  errdisable                 Set Error Disable Attributions
  exit                       Exit current level
  extern-config-file         Extern configuration file

To display keywords and arguments associated with a command, enter the command followed by a question mark (?) or a tab.

device(config)# qos ?
  egress-buffer-profile   User defined QoS egress profile
  mechanism               Change mechanism
  name                    Change name
  profile                 Change bandwidth allocation
  scheduler-profile       User defined QoS profile
  tagged-priority         Change tagged frame priority to profile mapping