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(grub.info)General usage of network support

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How to set up your network
==========================

   GRUB requires a file server and optionally a server that will assign
an IP address to the machine on which GRUB is running. For the former,
only TFTP is supported at the moment. The latter is either BOOTP, DHCP
or a RARP server(1) (Note: General usage of network
support-Footnote-1). It is not necessary to run both the servers on
one computer. How to configure these servers is beyond the scope of this
document, so please refer to the manuals specific to those
protocols/servers.

   If you decided to use a server to assign an IP address, set up the
server and run `bootp' (Note: bootp), `dhcp' (Note: dhcp) or `rarp'
(Note: rarp) for BOOTP, DHCP or RARP, respectively. Each command will
show an assigned IP address, a netmask, an IP address for your TFTP
server and a gateway. If any of the addresses is wrong or it causes an
error, probably the configuration of your servers isn't set up properly.

   Otherwise, run `ifconfig', like this:

     grub> ifconfig --address=192.168.110.23 --server=192.168.110.14

   You can also use `ifconfig' in conjugation with `bootp', `dhcp' or
`rarp' (e.g. to reassign the server address manually). Note:
ifconfig, for more details.

   Finally, download your OS images from your network. The network can
be accessed using the network drive `(nd)'. Everything else is very
similar to the normal instructions (Note: Booting).

   Here is an example:

     grub> bootp
     Probing... [NE*000]
     NE2000 base ...
     Address: 192.168.110.23    Netmask: 255.255.255.0
     Server: 192.168.110.14     Gateway: 192.168.110.1
     
     grub> root (nd)
     grub> kernel /tftproot/gnumach.gz root=sd0s1
     grub> module /tftproot/serverboot.gz
     grub> boot