iX 6.0)

Chapter 4 63

BOOTP Service

The bootpd Conﬁguration File

Editing Tips

When you are updating the bootpd conﬁguration ﬁle, keep the

following points in mind:

• Client’s hostname must be the ﬁrst ﬁeld of an entry.

• If you specify an ht tag, it must precede the ha and hm tags.

• If you specify the gw tag, you must also specify the sm tag.

• 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.

Tnnn=generic-data A generic tag where nnn is an RFC1048 vendor ﬁeld tag number.

This allows bootpd to immediately take advantage of future

extensions to RFC1048. The generic-data data can be represented

as either a stream of hexadecimal numbers or as a quoted string of

ASCII characters. The length of the generic data is automatically

determined and inserted into the proper ﬁelds of the

RFC1048-style boot reply.

tc=template-host Indicates a table continuation. Often many host entries share

common values for certain tags (such as domain servers) and,

rather than repeatedly specifying these tags, a full speciﬁcation

can be listed for one host entry and shared by others.

The template-host is a dummy host (conﬁguration ﬁle entry) for a

host that does not actually exist and never sends boot requests.

Information explicitly speciﬁed for a host always overrides

information implied by a tc tag symbol, regardless of its location

within the entry. The value of template-host can be the

hostname or IP address of any host entry previously listed in the

conﬁguration ﬁle. If it is necessary to delete a speciﬁc tag after it

has been inferred via tc, enter tag@. For example, to undo an

RFC1034 domain name server speciﬁcation, use :ds@: at an

appropriate place in the conﬁguration entry. After canceling the tag

this way, you may set it again.

to=offset Speciﬁes the client’s time zone offset in seconds from UTC. The

time offset can be either a signed decimal integer or the keyword

auto which uses the server’s time zone offset.

ts=ip_address_list Speciﬁes the IP address of one or more RFC868 Time Protocol

servers.

vm=magic-cookie Speciﬁes the RFC1048 vendor information magic cookie,

magic-cookie can be one of the following keywords: auto,

indicating that vendor information is determined by the client’s

request, rfc1048, which always forces an RFC1048-style reply, or

cmu, which always forces a CMU-style reply.

Tag Description