691 lines
22 KiB
Groff
Executable File
691 lines
22 KiB
Groff
Executable File
.\" dhcp-options.5
|
|
.\"
|
|
.\" Copyright (c) 1995, 1996, 1997, 1998 The Internet Software Consortium.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\"
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. Neither the name of The Internet Software Consortium nor the names
|
|
.\" of its contributors may be used to endorse or promote products derived
|
|
.\" from this software without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
|
|
.\" CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
.\" DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
|
|
.\" CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
.\" LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
|
.\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
.\" ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" This software has been written for the Internet Software Consortium
|
|
.\" by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
|
|
.\" Enterprises. To learn more about the Internet Software Consortium,
|
|
.\" see ``http://www.isc.org/isc''. To learn more about Vixie
|
|
.\" Enterprises, see ``http://www.vix.com''.
|
|
.TH dhcpd-options 5
|
|
.SH NAME
|
|
dhcp-options - Dynamic Host Configuration Protocol options
|
|
.SH DESCRIPTION
|
|
The Dynamic Host Configuration protocol allows the client to receive
|
|
.B options
|
|
from the DHCP server describing the network configuration and various
|
|
services that are available on the network. When configuring
|
|
.B dhcpd(8)
|
|
or
|
|
.B dhclient(8) ,
|
|
options must often be declared. The syntax for declaring options,
|
|
and the names and formats of the options that can be declared, are
|
|
documented here.
|
|
.SH REFERENCE: OPTION STATEMENTS
|
|
.PP
|
|
DHCP \fIoption\fR statements always start with the \fIoption\fR
|
|
keyword, followed by an option name, followed by option data. The
|
|
option names and data formats are described below. It is not
|
|
necessary to exhaustively specify all DHCP options - only those
|
|
options which are needed by clients must be specified.
|
|
.PP
|
|
Option data comes in a variety of formats, as defined below:
|
|
.PP
|
|
The
|
|
.B ip-address
|
|
data type can be entered either as an explicit IP
|
|
address (e.g., 239.254.197.10) or as a domain name (e.g.,
|
|
haagen.isc.org). When entering a domain name, be sure that that
|
|
domain name resolves to a single IP address.
|
|
.PP
|
|
The
|
|
.B int32
|
|
data type specifies a signed 32-bit integer. The
|
|
.B uint32
|
|
data type specifies an unsigned 32-bit integer. The
|
|
.B int16
|
|
and
|
|
.B uint16
|
|
data types specify signed and unsigned 16-bit integers. The
|
|
.B int8
|
|
and
|
|
.B uint8
|
|
data types specify signed and unsigned 8-bit integers.
|
|
Unsigned 8-bit integers are also sometimes referred to as octets.
|
|
.PP
|
|
The
|
|
.B string
|
|
data type specifies an NVT ASCII string, which must be
|
|
enclosed in double quotes - for example, to specify a domain-name
|
|
option, the syntax would be
|
|
.nf
|
|
.sp 1
|
|
option domain-name "isc.org";
|
|
.fi
|
|
.PP
|
|
The
|
|
.B flag
|
|
data type specifies a boolean value. Booleans can be either true or
|
|
false (or on or off, if that makes more sense to you).
|
|
.PP
|
|
The
|
|
.B data-string
|
|
data type specifies either an NVT ASCII string
|
|
enclosed in double quotes, or a series of octets specified in
|
|
hexadecimal, seperated by colons. For example:
|
|
.nf
|
|
.sp 1
|
|
option dhcp-client-identifier "CLIENT-FOO";
|
|
or
|
|
option dhcp-client-identifier 43:4c:49:45:54:2d:46:4f:4f;
|
|
.fi
|
|
.PP
|
|
The documentation for the various options mentioned below is taken
|
|
from the latest IETF draft document on DHCP options. Options which
|
|
are not listed by name may be defined by the name option-\fInnn\fR,
|
|
where \fInnn\fI is the decimal number of the option code. These
|
|
options may be followed either by a string, enclosed in quotes, or by
|
|
a series of octets, expressed as two-digit hexadecimal numbers seperated
|
|
by colons. For example:
|
|
.PP
|
|
.nf
|
|
option option-133 "my-option-133-text";
|
|
option option-129 1:54:c9:2b:47;
|
|
.fi
|
|
.PP
|
|
Because dhcpd does not know the format of these undefined option codes,
|
|
no checking is done to ensure the correctness of the entered data.
|
|
.PP
|
|
The standard options are:
|
|
.PP
|
|
.B option subnet-mask \fIip-address\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The subnet mask option specifies the client's subnet mask as per RFC
|
|
950. If no subnet mask option is provided anywhere in scope, as a
|
|
last resort dhcpd will use the subnet mask from the subnet declaration
|
|
for the network on which an address is being assigned. However,
|
|
.I any
|
|
subnet-mask option declaration that is in scope for the address being
|
|
assigned will override the subnet mask specified in the subnet
|
|
declaration.
|
|
.RE
|
|
.PP
|
|
.B option time-offset \fIint32\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The time-offset option specifies the offset of the client's subnet in
|
|
seconds from Coordinated Universal Time (UTC).
|
|
.RE
|
|
.PP
|
|
.B option routers \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The routers option specifies a list of IP addresses for routers on the
|
|
client's subnet. Routers should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option time-servers \fIip-address\fR [, \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The time-server option specifies a list of RFC 868 time servers
|
|
available to the client. Servers should be listed in order of
|
|
preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBien116-name-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
];
|
|
.RS 0.25i
|
|
.PP
|
|
The ien116-name-servers option specifies a list of IEN 116 name servers
|
|
available to the client. Servers should be listed in order of
|
|
preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBdomain-name-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The domain-name-servers option specifies a list of Domain Name System
|
|
(STD 13, RFC 1035) name servers available to the client. Servers
|
|
should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBlog-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The log-server option specifies a list of MIT-LCS UDP log servers
|
|
available to the client. Servers should be listed in order of
|
|
preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBcookie-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The cookie server option specifies a list of RFC 865 cookie
|
|
servers available to the client. Servers should be listed in order
|
|
of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBlpr-servers\fR \fIip-address \fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The LPR server option specifies a list of RFC 1179 line printer
|
|
servers available to the client. Servers should be listed in order
|
|
of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBimpress-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The impress-server option specifies a list of Imagen Impress servers
|
|
available to the client. Servers should be listed in order of
|
|
preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBresource-location-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a list of RFC 887 Resource Location
|
|
servers available to the client. Servers should be listed in order
|
|
of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBhost-name\fR \fIstring\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the name of the client. The name may or may
|
|
not be qualified with the local domain name (it is preferable to use
|
|
the domain-name option to specify the domain name). See RFC 1035 for
|
|
character set restrictions.
|
|
.RE
|
|
.PP
|
|
.B option \fBboot-size\fR \fIuint16\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the length in 512-octet blocks of the default
|
|
boot image for the client.
|
|
.RE
|
|
.PP
|
|
.B option \fBmerit-dump\fR \fIstring\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the path-name of a file to which the client's
|
|
core image should be dumped in the event the client crashes. The
|
|
path is formatted as a character string consisting of characters from
|
|
the NVT ASCII character set.
|
|
.RE
|
|
.PP
|
|
.B option \fBdomain-name\fR \fIstring\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the domain name that client should use when
|
|
resolving hostnames via the Domain Name System.
|
|
.RE
|
|
.PP
|
|
.B option \fBswap-server\fR \fIip-address\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This specifies the IP address of the client's swap server.
|
|
.RE
|
|
.PP
|
|
.B option \fBroot-path\fR \fIstring\fB;\fR\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the path-name that contains the client's root
|
|
disk. The path is formatted as a character string consisting of
|
|
characters from the NVT ASCII character set.
|
|
.RE
|
|
.PP
|
|
.B option \fBip-forwarding\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies whether the client should configure its IP
|
|
layer for packet forwarding. A value of 0 means disable IP
|
|
forwarding, and a value of 1 means enable IP forwarding.
|
|
.RE
|
|
.PP
|
|
.B option \fBnon-local-source-routing\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies whether the client should configure its IP
|
|
layer to allow forwarding of datagrams with non-local source routes
|
|
(see Section 3.3.5 of [4] for a discussion of this topic). A value
|
|
of 0 means disallow forwarding of such datagrams, and a value of 1
|
|
means allow forwarding.
|
|
.RE
|
|
.PP
|
|
.B option \fBpolicy-filter\fR \fIip-address ip-address\fR [\fB,\fR \fIip-address ip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies policy filters for non-local source routing.
|
|
The filters consist of a list of IP addresses and masks which specify
|
|
destination/mask pairs with which to filter incoming source routes.
|
|
.PP
|
|
Any source routed datagram whose next-hop address does not match one
|
|
of the filters should be discarded by the client.
|
|
.PP
|
|
See STD 3 (RFC1122) for further information.
|
|
.RE
|
|
.PP
|
|
.B option \fBmax-dgram-reassembly\fR \fIuint16\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the maximum size datagram that the client
|
|
should be prepared to reassemble. The minimum value legal value is
|
|
576.
|
|
.RE
|
|
.PP
|
|
.B option \fBdefault-ip-ttl\fR \fIuint8;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the default time-to-live that the client should
|
|
use on outgoing datagrams.
|
|
.RE
|
|
.PP
|
|
.B option \fBpath-mtu-aging-timeout\fR \fIuint32\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the timeout (in seconds) to use when aging Path
|
|
MTU values discovered by the mechanism defined in RFC 1191.
|
|
.RE
|
|
.PP
|
|
.B option \fBpath-mtu-plateau-table\fR \fIuint16\fR [\fB,\fR \fIuint16\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a table of MTU sizes to use when performing
|
|
Path MTU Discovery as defined in RFC 1191. The table is formatted as
|
|
a list of 16-bit unsigned integers, ordered from smallest to largest.
|
|
The minimum MTU value cannot be smaller than 68.
|
|
.RE
|
|
.PP
|
|
.B option \fBinterface-mtu\fR \fIuint16\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the MTU to use on this interface. The minimum
|
|
legal value for the MTU is 68.
|
|
.RE
|
|
.PP
|
|
.B option \fBall-subnets-local\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies whether or not the client may assume that all
|
|
subnets of the IP network to which the client is connected use the
|
|
same MTU as the subnet of that network to which the client is
|
|
directly connected. A value of 1 indicates that all subnets share
|
|
the same MTU. A value of 0 means that the client should assume that
|
|
some subnets of the directly connected network may have smaller MTUs.
|
|
.RE
|
|
.PP
|
|
.B option \fBbroadcast-address\fR \fIip-address\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the broadcast address in use on the client's
|
|
subnet. Legal values for broadcast addresses are specified in
|
|
section 3.2.1.3 of STD 3 (RFC1122).
|
|
.RE
|
|
.PP
|
|
.B option \fBperform-mask-discovery\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies whether or not the client should perform subnet
|
|
mask discovery using ICMP. A value of 0 indicates that the client
|
|
should not perform mask discovery. A value of 1 means that the
|
|
client should perform mask discovery.
|
|
.RE
|
|
.PP
|
|
.B option \fBmask-supplier\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies whether or not the client should respond to
|
|
subnet mask requests using ICMP. A value of 0 indicates that the
|
|
client should not respond. A value of 1 means that the client should
|
|
respond.
|
|
.RE
|
|
.PP
|
|
.B option \fBrouter-discovery\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies whether or not the client should solicit
|
|
routers using the Router Discovery mechanism defined in RFC 1256.
|
|
A value of 0 indicates that the client should not perform
|
|
router discovery. A value of 1 means that the client should perform
|
|
router discovery.
|
|
.RE
|
|
.PP
|
|
.B option \fBrouter-solicitation-address\fR \fIip-address\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the address to which the client should transmit
|
|
router solicitation requests.
|
|
.RE
|
|
.PP
|
|
.B option \fBstatic-routes\fR \fIip-address ip-address\fR [\fB,\fR \fIip-address ip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a list of static routes that the client should
|
|
install in its routing cache. If multiple routes to the same
|
|
destination are specified, they are listed in descending order of
|
|
priority.
|
|
.PP
|
|
The routes consist of a list of IP address pairs. The first address
|
|
is the destination address, and the second address is the router for
|
|
the destination.
|
|
.PP
|
|
The default route (0.0.0.0) is an illegal destination for a static
|
|
route. To specify the default route, use the
|
|
.B routers
|
|
option.
|
|
.RE
|
|
.PP
|
|
.B option \fBtrailer-encapsulation\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies whether or not the client should negotiate the
|
|
use of trailers (RFC 893 [14]) when using the ARP protocol. A value
|
|
of 0 indicates that the client should not attempt to use trailers. A
|
|
value of 1 means that the client should attempt to use trailers.
|
|
.RE
|
|
.PP
|
|
.B option \fBarp-cache-timeout\fR \fIuint32\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the timeout in seconds for ARP cache entries.
|
|
.RE
|
|
.PP
|
|
.B option \fBieee802-3-encapsulation\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies whether or not the client should use Ethernet
|
|
Version 2 (RFC 894) or IEEE 802.3 (RFC 1042) encapsulation if the
|
|
interface is an Ethernet. A value of 0 indicates that the client
|
|
should use RFC 894 encapsulation. A value of 1 means that the client
|
|
should use RFC 1042 encapsulation.
|
|
.RE
|
|
.PP
|
|
.B option \fBdefault-tcp-ttl\fR \fIuint8\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the default TTL that the client should use when
|
|
sending TCP segments. The minimum value is 1.
|
|
.RE
|
|
.PP
|
|
.B option \fBtcp-keepalive-interval\fR \fIuint32\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the interval (in seconds) that the client TCP
|
|
should wait before sending a keepalive message on a TCP connection.
|
|
The time is specified as a 32-bit unsigned integer. A value of zero
|
|
indicates that the client should not generate keepalive messages on
|
|
connections unless specifically requested by an application.
|
|
.RE
|
|
.PP
|
|
.B option \fBtcp-keepalive-garbage\fR \fIflag\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the whether or not the client should send TCP
|
|
keepalive messages with a octet of garbage for compatibility with
|
|
older implementations. A value of 0 indicates that a garbage octet
|
|
should not be sent. A value of 1 indicates that a garbage octet
|
|
should be sent.
|
|
.RE
|
|
.PP
|
|
.B option \fBnis-domain\fR \fIstring\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the name of the client's NIS (Sun Network
|
|
Information Services) domain. The domain is formatted as a character
|
|
string consisting of characters from the NVT ASCII character set.
|
|
.RE
|
|
.PP
|
|
.B option \fBnis-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a list of IP addresses indicating NIS servers
|
|
available to the client. Servers should be listed in order of
|
|
preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBntp-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a list of IP addresses indicating NTP (RFC 1035)
|
|
servers available to the client. Servers should be listed in order
|
|
of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBnetbios-name-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The NetBIOS name server (NBNS) option specifies a list of RFC
|
|
1001/1002 NBNS name servers listed in order of preference. NetBIOS
|
|
Name Service is currently more commonly referred to as WINS. WINS
|
|
servers can be specified using the netbios-name-servers option.
|
|
.RE
|
|
.PP
|
|
.B option \fBnetbios-dd-server\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The NetBIOS datagram distribution server (NBDD) option specifies a
|
|
list of RFC 1001/1002 NBDD servers listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBnetbios-node-type\fR \fIuint8\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The NetBIOS node type option allows NetBIOS over TCP/IP clients which
|
|
are configurable to be configured as described in RFC 1001/1002. The
|
|
value is specified as a single octet which identifies the client type.
|
|
.PP
|
|
Possible node types are:
|
|
.PP
|
|
.TP 5
|
|
.I 1
|
|
B-node: Broadcast - no WINS
|
|
.TP
|
|
.I 2
|
|
P-node: Peer - WINS only.
|
|
.TP
|
|
.I 4
|
|
M-node: Mixed - broadcast, then WINS
|
|
.TP
|
|
.I 8
|
|
H-node: Hybrid - WINS, then broadcast
|
|
.RE
|
|
.PP
|
|
.B option
|
|
.B netbios-scope
|
|
.I string\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The NetBIOS scope option specifies the NetBIOS over TCP/IP scope
|
|
parameter for the client as specified in RFC 1001/1002. See RFC1001,
|
|
RFC1002, and RFC1035 for character-set restrictions.
|
|
.RE
|
|
.PP
|
|
.B option \fBfont-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a list of X Window System Font servers available
|
|
to the client. Servers should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBx-display-manager\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a list of systems that are running the X Window
|
|
System Display Manager and are available to the client. Addresses
|
|
should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBdhcp-client-identifier\fR \fIdata-string\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option can be used to specify the a DHCP client identifier in a
|
|
host declaration, so that dhcpd can find the host record by matching
|
|
against the client identifier.
|
|
.RE
|
|
.B option \fBnisplus-domain\fR \fIstring\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies the name of the client's NIS+ domain. The
|
|
domain is formatted as a character string consisting of characters
|
|
from the NVT ASCII character set.
|
|
.RE
|
|
.B option \fBnisplus-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR...
|
|
]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a list of IP addresses indicating NIS+ servers
|
|
available to the client. Servers should be listed in order of
|
|
preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBtftp-server-name\fR \fIstring\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option is used to identify a TFTP server and, if supported by the
|
|
client, should have the same effect as the \fBserver-name\fR
|
|
declaration. BOOTP clients are unlikely to support this option.
|
|
Some DHCP clients will support it, and others actually require it.
|
|
.RE
|
|
.PP
|
|
.B option \fBbootfile-name\fR \fIstring\fR\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option is used to identify a bootstrap file. If supported by the
|
|
client, it should have the same effect as the \fBfilename\fR
|
|
declaration. BOOTP clients are unlikely to support this option. Some
|
|
DHCP clients will support it, and others actually require it.
|
|
.RE
|
|
.PP
|
|
.B option \fBmobile-ip-home-agent\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
This option specifies a list of IP addresses indicating mobile IP
|
|
home agents available to the client. Agents should be listed in
|
|
order of preference, although normally there will be only one such
|
|
agent.
|
|
.RE
|
|
.PP
|
|
.B option \fBsmtp-server\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The SMTP server option specifies a list of SMTP servers available to
|
|
the client. Servers should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBpop-server\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The POP3 server option specifies a list of POP3 available to the
|
|
client. Servers should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBnntp-server\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The NNTP server option specifies a list of NNTP available to the
|
|
client. Servers should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBwww-server\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The WWW server option specifies a list of WWW available to the
|
|
client. Servers should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBfinger-server\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The Finger server option specifies a list of Finger available to the
|
|
client. Servers should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBirc-server\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The IRC server option specifies a list of IRC available to the
|
|
client. Servers should be listed in order of preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBstreettalk-server\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The StreetTalk server option specifies a list of StreetTalk servers
|
|
available to the client. Servers should be listed in order of
|
|
preference.
|
|
.RE
|
|
.PP
|
|
.B option \fBstreetalk-directory-assistance-server\fR \fIip-address\fR [\fB,\fR
|
|
\fIip-address\fR... ]\fB;\fR
|
|
.RS 0.25i
|
|
.PP
|
|
The StreetTalk Directory Assistance (STDA) server option specifies a
|
|
list of STDA servers available to the client. Servers should be
|
|
listed in order of preference.
|
|
.RE
|
|
.SH SEE ALSO
|
|
dhcpd.conf(5), dhcpd.leases(5), dhclient.conf(5), dhcpd(8),
|
|
dhclient(8), RFC2132, RFC2131.
|
|
.SH AUTHOR
|
|
.B dhcpd(8)
|
|
was written by Ted Lemon <mellon@vix.com>
|
|
under a contract with Vixie Labs. Funding
|
|
for this project was provided by the Internet Software Corporation.
|
|
Information about the Internet Software Consortium can be found at
|
|
.B http://www.isc.org/isc.
|