Installing and Administering Internet Services

178 Chapter 5

Conﬁguring TFTP and BOOTP Servers

Adding Client or Relay Information

• The ht (hardware type) tag, if speciﬁed, must precede the ha

(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.