x86: Diskless Client Changes in the GRUB Boot Environment

The following feature enhancements are part of the new diskless boot scheme:

• The OS server is now capable of serving multiple Solaris releases simultaneously.

  With the new diskless boot scheme, you can perform a pxegrub based network boot, where multiple releases are presented to a client from the GRUB menu.

• Vendor-specific options are now specified in the boot archive.

  In previous releases, client-specific boot properties, typically defined in the bootenv.rc file, were provided by using vendor-specific options for the DHCP setup. The total length of the information that was required frequently exceeded the limit in the DHCP specification.

  With the new boot scheme, this information is now part of the boot archive. The PXE/DHCP server is only required to provide the server IP address, the boot file, pxegrub, and possibly a client-specific menu file, through Site Option 150.