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You might need to boot a stand-alone system from the network for recovery purposes, if the system cannot boot from the local disk. Any system can boot from the network, if a boot server is available.
To boot a SPARC based system from the network, a DHCP server is required. Also required is a boot server that provides tftp service. The DHCP server supplies the information that the client needs to configure its network interface.
You can boot an x86 based system directly from a network that supports the PXE network boot protocol. The default network boot strategy that is used for both PXE and non-PXE devices is DHCP. If no PXE or DHCP server is available, you can load GRUB from a diskette, a CD-ROM, or local disk.
For SPARC based systems, the process of booting over a local area network (LAN) and booting over a wide area network (WAN) is slightly different. In both network boot scenarios, the PROM downloads the booter from a boot server or an install server, which is inetboot in this case.
When booting over a (LAN), the firmware uses DHCP to discover the boot or install server. TFTP is then used to download the booter, which is inetboot in this case. When booting over a WAN, the firmware uses either DHCP or NVRAM properties to discover the install server, the router, and the proxies that are required for the system to boot from the network. The protocol that is used to download the booter is HTTP. In addition, the booter's signature might be checked with a predefined private key.
For more information, see the following references:
For more information about how DHCP works in this Oracle Solaris release, see Part II, DHCP, in Oracle Solaris Administration: IP Services.
For detailed instructions on booting an x86 system from the network, see Chapter 5, Booting an x86 Based System From the Network (Tasks), in Booting and Shutting Down Oracle Solaris on x86 Platforms.
For detailed instructions on booting a SPARC based system from the network, see Chapter 5, Booting a SPARC Based System From the Network (Tasks), in Booting and Shutting Down Oracle Solaris on SPARC Platforms.
For detailed information about setting up an install server, an install client, and other installation options, see Installing Oracle Solaris 11 Systems.