grub2: net_bootp

 
 16.4.4 net_bootp
 ----------------
 
  -- Command: net_bootp [CARD]
      Perform configuration of CARD using DHCP protocol.  If no card name
      is specified, try to configure all existing cards.  If
      configuration was successful, interface with name CARD':dhcp' and
      configured address is added to CARD.  Additionally the following
      DHCP options are recognized and processed:
 
      '1 (Subnet Mask)'
           Used to calculate network local routing entry for interface
           CARD':dhcp'.
      '3 (Router)'
           Adds default route entry with the name CARD':dhcp:default' via
           gateway from DHCP option.  Note that only option with single
           route is accepted.
      '6 (Domain Name Server)'
           Adds all servers from option value to the list of servers used
           during name resolution.
      '12 (Host Name)'
           Sets environment variable 'net_'<CARD>'_dhcp_hostname' (See
           net_<INTERFACE>_hostname) to the value of option.
      '15 (Domain Name)'
           Sets environment variable 'net_'<CARD>'_dhcp_domain' (See
           net_<INTERFACE>_domain) to the value of option.
      '17 (Root Path)'
           Sets environment variable 'net_'<CARD>'_dhcp_rootpath' (See
           net_<INTERFACE>_rootpath) to the value of option.
      '18 (Extensions Path)'
           Sets environment variable 'net_'<CARD>'_dhcp_extensionspath'
           (Seenet_<INTERFACE>_extensionspath) to the value of
           option.