dhcp-options.5

DHCP服务器源码

.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 \fBextensions-path\fR \fItext\fR\fB;\fR
.RS 0.25i
.PP
This option specifies the name of a file containing additional options
to be interpreted according to the DHCP option format as specified in
RFC2132.
.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 servers available
to the client.  Servers should be listed in order of preference.
.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 \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.  This option is only honored by
.B dhclient-script(8)
if the hostname for the client machine is not set.
.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 false indicates that the client
should use RFC 894 encapsulation.  A value of true means that the client
should use RFC 1042 encapsulation.
.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 \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 \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 \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 false means disable IP
forwarding, and a value of true means enable IP forwarding.
.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 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 \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 \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 false indicates that the
client should not respond.  A value of true means that the client should
respond.
.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 legal value is
576.
.RE
.PP
.B option \fBmerit-dump\fR \fItext\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 \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 \fBnds-context\fR \fIstring\fR\fB;\fR
.RS 0.25i
.PP
The nds-context option specifies the name of the initial Netware
Directory Service for an NDS client.
.RE
.PP
.B option \fBnds-servers\fR \fIip-address\fR [\fB,\fR \fIip-address\fR... ]\fB;\fR
.RS 0.25i
.PP
The nds-servers option specifies a list of IP addresses of NDS servers.
.RE
.PP
.B option \fBnds-tree-name\fR \fIstring\fR\fB;\fR
.RS 0.25i
.PP
The nds-tree-name option specifies NDS tree name that the NDS client
should use.
.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-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-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 \fBnetbios-scope\fR \fIstring\fR\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 \fBnis-domain\fR \fItext\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 \fBnisplus-domain\fR \fItext\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
.PP
.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 \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 servesr available
to the client.  Servers should be listed in order of preference.
.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 false means disallow forwarding of such datagrams, and a value of true
means allow forwarding.
.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 \fBnwip-domain\fR \fIstring\fR\fB;\fR
.RS 0.25i
.PP
The name of the NetWare/IP domain that a NetWare/IP client should
use.
.RE
.PP
.B option \fBnwip-suboptions\fR \fIstring\fR\fB;\fR
.RS 0.25i
.PP
A sequence of suboptions for NetWare/IP clients - see RFC2242 for
details.   Normally this option is set by specifying specific
NetWare/IP suboptions - see the NETWARE/IP SUBOPTIONS section for more
information.
.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 \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 false indicates that the client
should not perform mask discovery.  A value of true means that the
client should perform mask discovery.
.RE
.PP
.nf
.B option \fBpolicy-filter\fR \fIip-address ip-address\fR
                  [\fB,\fR \fIip-address ip-address\fR...]\fB;\fR
.RE
.fi
.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 \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 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
.fi
.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 \fBroot-path\fR \fItext\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 \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 false indicates that the client should not perform
router discovery.  A value of true 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