Installing and Administering Internet Services

232 Chapter5
Configuring TFTP and BOOTP Servers
Adding Client or Relay Information
(hardware address) and hm (hardware mask) tags.
• If the gw (gateway IP address) tag is specified, the sm (subnet mask)
tag must also be specified.
Other points to know when adding an entry in /etc/bootptab include
the following:
• IP addresses listed for a single tag must be separated by a space.
• A single client entry can be extended over multiple lines if you use a
backslash (\) at the end of each line.
• Blank lines and lines that begin with the pound sign (#) are ignored.
Parameter Tags and Descriptions
Table 5-1 lists the tags most commonly used to define the client
parameters. For more information on these and the other tags available,
type man 1M bootpd.
Table 5-1 Tags for Defining Client Options in bootptab
ba Forces bootpd to broadcast the bootreply to the client’s network. This tag
should be used only when troubleshooting with the bootpquery program.
bf Boot file name that the client downloads with TFTP.
bs Boot file size in 512-byte blocks. If this tag is specified with no equal sign or
value, the server automatically calculates the boot file size at each request.
ds IP address(es) of the BIND name server(s).
gw IP address(es) of the gateway(s) for the client’s subnet.
ha Client’s hardware address.
hd Directory to which the boot file is appended (see bf tag). The directory
specified must end with /. The default is /.
hn Send the host name in the bootreply. This tag is strictly Boolean; it does not
need an equals sign or an assigned value.
ht Client’s hardware type. May be assigned the value ieee or ether. If used,
this tag must precede the ha tag.
ip BOOTP client’s IP address. This tag takes only one IP address. This tag
distinguishes a boot entry from a relay entry.