Configuring and Managing MPE/iX Internet Services (August 2002)

Chapter 4
BOOTP Service
The bootpd Configuration File
57
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.
• Blank lines and lines that begin with the pound sign (#) are ignored.
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