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7 .TH DHCP_INITTAB 4 "Oct 31, 2016"
8 .SH NAME
9 dhcp_inittab \- information repository for DHCP options
10 .SH DESCRIPTION
11 .sp
12 .LP
13 The \fB/etc/dhcp/inittab\fR and the \fB/etc/dhcp/inittab6\fR files contain
14 information about the Dynamic Host Configuration Protocol (\fBDHCP\fR) options,
15 which are network configuration parameters passed from \fBDHCP\fR servers to
16 \fBDHCP\fR clients when a client machine uses \fBDHCP\fR. Since many
17 \fBDHCP\fR-related commands must parse and understand these \fBDHCP\fR options,
18 this file serves as a central location where information about these options
19 may be obtained.
20 .sp
21 .LP
22 The \fBDHCP\fR \fBinittab\fR and \fBinittab6\fR files provide three general
23 pieces of information:
24 .RS +4
25 .TP
26 .ie t \(bu
27 .el o
28 A mnemonic alias, or symbol name, for each option number. For instance, option
29 12 is aliased to the name \fBHostname\fR. This is useful for \fBDHCP\fR-related
30 programs that require human interaction, such as \fBdhcpinfo\fR(1).
31 .RE
32 .RS +4
33 .TP
34 .ie t \(bu
35 .el o
36 Information about the syntax for each option. This includes information such as
37 the type of the value, for example, whether it is a 16-bit integer or an
38 \fBIP\fR address.
39 .RE
40 .RS +4
41 .TP
42 .ie t \(bu
43 .el o
44 The policy for what options are visible to which \fBDHCP\fR-related programs.
45 .RE
46 .sp
47 .LP
48 If you make any changes to the \fB/etc/dhcp/inittab\fR file, note that only
49 additions of or changes to \fBSITE\fR options are preserved during upgrade. For
50 \fB/etc/dhcp/inittab6\fR, no options are preserved during upgrade.
51 .sp
52 .LP
53 The \fBVENDOR\fR options defined here are intended for use by the Solaris
54 \fBDHCP\fR client and \fBDHCP\fR management tools. The \fBSUNW\fR vendor space
55 is owned by Sun, and changes are likely during upgrade. If you need to
56 configure the Solaris \fBDHCP\fR server to support the vendor options of a
57 different client, see \fBdhcptab\fR(4) for details.
58 .sp
59 .LP
60 Each \fBDHCP\fR option belongs to a certain category, which roughly defines the
61 scope of the option; for instance, an option may only be understood by certain
62 hosts within a given site, or it may be globally understood by all \fBDHCP\fR
63 clients and servers. The following categories are defined; the category names
64 are not case-sensitive:
65 .sp
66 .ne 2
67 .na
68 \fB\fBSTANDARD\fR\fR
69 .ad
70 .RS 12n
71 All client and server \fBDHCP\fR implementations agree on the semantics. These
72 are administered by the Internet Assigned Numbers Authority (\fBIANA\fR). These
73 options are numbered from \fB1\fR to \fB127\fR for IPv4 DHCP, and \fB1\fR to
74 \fB65535\fR for DHCPv6.
75 .RE
76
77 .sp
78 .ne 2
79 .na
80 \fB\fBSITE\fR\fR
81 .ad
82 .RS 12n
83 Within a specific site, all client and server implementations agree on the
84 semantics. However, at another site the type and meaning of the option may be
85 quite different. These options are numbered from \fB128\fR to \fB254\fR for
86 IPv4 DHCP. DHCPv6 does not support site options.
87 .RE
88
89 .sp
90 .ne 2
91 .na
92 \fB\fBVENDOR\fR\fR
93 .ad
94 .RS 12n
95 Each vendor may define \fB254\fR options (65536 for DHCPv6) unique to that
96 vendor. The vendor is identified within a \fBDHCP\fR packet by the "Vendor
97 Class" option, number \fB60\fR (number \fB17\fR for DHCPv6). An option with a
98 specific numeric identifier belonging to one vendor will, in general, have a
99 type and semantics different from that of a different vendor. Vendor options
100 are "super-encapsulated" into the vendor field number \fB43\fR, as defined in
101 \fIRFC 2132\fR for IPv4 DHCP, and number \fB17\fR as defined in RFC 3315 for
102 DHCPv6. The \fB/etc/dhcp/inittab\fR file contains only Sun vendor options.
103 Define non-Sun vendor options in the \fBdhcptab\fR file.
104 .RE
105
106 .sp
107 .ne 2
108 .na
109 \fB\fBFIELD\fR\fR
110 .ad
111 .RS 12n
112 This category allows the fixed fields within a \fBDHCP\fR packet to be aliased
113 to a mnemonic name for use with \fBdhcpinfo\fR(1).
114 .RE
115
116 .sp
117 .ne 2
118 .na
119 \fB\fBINTERNAL\fR\fR
120 .ad
121 .RS 12n
122 This category is internal to the Solaris \fBDHCP\fR implementation and will not
123 be further defined.
124 .RE
125
126 .SS "DHCP \fBinittab\fR and \fBinittab6\fR Format"
127 .sp
128 .LP
129 Data entries are written one per line and have seven fields; each entry
130 provides information for one option. Each field is separated by a comma, except
131 for the first and second, which are separated by whitespace (as defined in
132 \fBisspace\fR(3C)). An entry cannot be continued onto another line. Blank lines
133 and those whose first non-whitespace character is '#' are ignored.
134 .sp
135 .LP
136 The fields, in order, are:
137 .RS +4
138 .TP
139 .ie t \(bu
140 .el o
141 Mnemonic Identifier
142 .sp
143 The Mnemonic Identifier is a user-friendly alias for the option number; it is
144 not case sensitive. This field must be per-category unique and should be unique
145 across all categories. The option names in the \fBSTANDARD\fR, \fBSITE\fR, and
146 \fBVENDOR\fR spaces should not overlap, or the behavior will be undefined. See
147 \fBMnemonic Identifiers for Options\fR section of this man page for
148 descriptions of the option names.
149 .RE
150 .RS +4
151 .TP
152 .ie t \(bu
153 .el o
154 Category (scope)
155 .sp
156 The Category field is one of \fBSTANDARD\fR, \fBSITE\fR, \fBVENDOR\fR,
157 \fBFIELD\fR, or \fBINTERNAL\fR and identifies the scope in which the option
158 falls. \fBSITE\fR is not used in \fBinittab6\fR.
159 .RE
160 .RS +4
161 .TP
162 .ie t \(bu
163 .el o
164 Option Number
165 .sp
166 The Option Number is the number of this option when it is in a \fBDHCP\fR
167 packet. This field should be per-category unique and the \fBSTANDARD\fR and
168 \fBSITE\fR fields should not have overlapping code fields or the behavior is
169 undefined.
170 .RE
171 .RS +4
172 .TP
173 .ie t \(bu
174 .el o
175 Data Type
176 .sp
177 Data Type is one of the following values, which are not case sensitive:
178 .RS
179
180 .sp
181 .ne 2
182 .na
183 \fB\fBAscii\fR\fR
184 .ad
185 .RS 13n
186 A printable character string
187 .RE
188
189 .sp
190 .ne 2
191 .na
192 \fBBool\fR
193 .ad
194 .RS 13n
195 Has no value. Scope limited to category limited to \fBINTERNAL\fR. Presence of
196 an option of this type within a Solaris configuration file represents
197 \fBTRUE\fR, absence represents \fBFALSE\fR.
198 .RE
199
200 .sp
201 .ne 2
202 .na
203 \fB\fBOctet\fR\fR
204 .ad
205 .RS 13n
206 An array of bytes
207 .RE
208
209 .sp
210 .ne 2
211 .na
212 \fB\fBUnumber8\fR\fR
213 .ad
214 .RS 13n
215 An 8-bit unsigned integer
216 .RE
217
218 .sp
219 .ne 2
220 .na
221 \fB\fBSnumber8\fR\fR
222 .ad
223 .RS 13n
224 An 8-bit signed integer
225 .RE
226
227 .sp
228 .ne 2
229 .na
230 \fB\fBUnumber16\fR\fR
231 .ad
232 .RS 13n
233 A 16-bit unsigned integer
234 .RE
235
236 .sp
237 .ne 2
238 .na
239 \fB\fBSnumber16\fR\fR
240 .ad
241 .RS 13n
242 A 16-bit signed integer
243 .RE
244
245 .sp
246 .ne 2
247 .na
248 \fB\fBUnumber24\fR\fR
249 .ad
250 .RS 13n
251 A 24-bit unsigned integer
252 .RE
253
254 .sp
255 .ne 2
256 .na
257 \fB\fBUnumber32\fR\fR
258 .ad
259 .RS 13n
260 A 32-bit unsigned integer
261 .RE
262
263 .sp
264 .ne 2
265 .na
266 \fB\fBSnumber32\fR\fR
267 .ad
268 .RS 13n
269 A 32-bit signed integer
270 .RE
271
272 .sp
273 .ne 2
274 .na
275 \fB\fBUnumber64\fR\fR
276 .ad
277 .RS 13n
278 A 64-bit unsigned integer
279 .RE
280
281 .sp
282 .ne 2
283 .na
284 \fB\fBSnumber64\fR\fR
285 .ad
286 .RS 13n
287 A 64-bit signed integer
288 .RE
289
290 .sp
291 .ne 2
292 .na
293 \fB\fBIp\fR\fR
294 .ad
295 .RS 13n
296 An \fBIPv4\fR address
297 .RE
298
299 .sp
300 .ne 2
301 .na
302 \fB\fBIpv6\fR\fR
303 .ad
304 .RS 13n
305 An \fBIPv6\fR address
306 .RE
307
308 .sp
309 .ne 2
310 .na
311 \fB\fBDuid\fR\fR
312 .ad
313 .RS 13n
314 An RFC 3315 Unique Identifier
315 .RE
316
317 .sp
318 .ne 2
319 .na
320 \fB\fBDomain\fR\fR
321 .ad
322 .RS 13n
323 An RFC 1035-encoded domain name
324 .RE
325
326 .RE
327
328 The data type field describes an indivisible unit of the option payload, using
329 one of the values listed above.
330 .RE
331 .RS +4
332 .TP
333 .ie t \(bu
334 .el o
335 Granularity
336 .sp
337 The Granularity field describes how many indivisible units in the option
338 payload make up a whole value or item for this option. The value must be
339 greater than zero (\fB0\fR) for any data type other than Bool, in which case it
340 must be zero (\fB0\fR).
341 .RE
342 .RS +4
343 .TP
344 .ie t \(bu
345 .el o
346 Maximum Number Of Items
347 .sp
348 This value specifies the maximum items of Granularity which are permissible
349 in a definition using this symbol. For example, there can only be one IP
350 address specified for a subnet mask, so the Maximum number of items
351 in this case is one (\fB1\fR). A Maximum value of zero (\fB0\fR) means
352 that a variable number of items is permitted.
353 .RE
354 .RS +4
355 .TP
356 .ie t \(bu
357 .el o
358 Visibility
359 .sp
360 The Visibility field specifies which \fBDHCP\fR-related programs make use of
361 this information, and should always be defined as \fBsdmi\fR for newly added
362 options.
363 .RE
364 .SS "Mnemonic Identifiers for IPv4 Options"
365 .sp
366 .LP
367 The following table maps the mnemonic identifiers used in Solaris DHCP to
368 \fIRFC 2132\fR options:
369 .sp
370
371 .sp
372 .TS
373 c c c
374 l l l .
375 \fISymbol\fR \fICode\fR \fIDescription\fR
376 _
377 \fBSubnet\fR \fB1\fR T{
378 Subnet Mask, dotted Internet address (IP).
379 T}
380 \fBUTCoffst\fR \fB2\fR T{
381 Coordinated Universal time offset (seconds) [deprecated].
382 T}
383 \fBRouter\fR \fB3\fR List of Routers, IP.
384 \fBTimeserv\fR \fB4\fR List of RFC-868 servers, IP.
385 \fBIEN116ns\fR \fB5\fR List of IEN 116 name servers, IP.
386 \fBDNSserv\fR \fB6\fR List of DNS name servers, IP.
387 \fBLogserv\fR \fB7\fR List of MIT-LCS UDP log servers, IP.
388 \fBCookie\fR \fB8\fR List of RFC-865 cookie servers, IP.
389 \fBLprserv\fR \fB9\fR T{
390 List of RFC-1179 line printer servers, IP.
391 T}
392 \fBImpress\fR \fB10\fR List of Imagen Impress servers, IP.
393 \fBResource\fR \fB11\fR T{
394 List of RFC-887 resource location servers, IP.
395 T}
396 \fBHostname\fR \fB12\fR T{
397 Client's hostname, value from hosts database.
398 T}
399 \fBBootsize\fR \fB13\fR T{
400 Number of 512 octet blocks in boot image, NUMBER.
401 T}
402 \fBDumpfile\fR \fB14\fR T{
403 Path where core image should be dumped, ASCII.
404 T}
405 \fBDNSdmain\fR \fB15\fR DNS domain name, ASCII.
406 \fBSwapserv\fR \fB16\fR Client's swap server, IP.
407 \fBRootpath\fR \fB17\fR Client's Root path, ASCII.
408 \fBExtendP\fR \fB18\fR Extensions path, ASCII.
409 \fBIpFwdF\fR \fB19\fR IP Forwarding Enable/Disable, NUMBER.
410 \fBNLrouteF\fR \fB20\fR Non-local Source Routing, NUMBER.
411 \fBPFilter\fR \fB21\fR Policy Filter, IP.
412 \fBMaxIpSiz\fR \fB22\fR T{
413 Maximum datagram Reassembly Size, NUMBER.
414 T}
415 \fBIpTTL\fR \fB23\fR T{
416 Default IP Time to Live, (1=<x<=255), NUMBER.
417 T}
418 \fBPathTO\fR \fB24\fR RFC-1191 Path MTU Aging Timeout, NUMBER.
419 \fBPathTbl\fR \fB25\fR RFC-1191 Path MTU Plateau Table, NUMBER.
420 \fBMTU\fR \fB26\fR Interface MTU, x>=68, NUMBER.
421 \fBSameMtuF\fR \fB27\fR All Subnets are Local, NUMBER.
422 \fBBroadcst\fR \fB28\fR Broadcast Address, IP.
423 \fBMaskDscF\fR \fB29\fR Perform Mask Discovery, NUMBER.
424 \fBMaskSupF\fR \fB30\fR Mask Supplier, NUMBER.
425 \fBRDiscvyF\fR \fB31\fR Perform Router Discovery, NUMBER.
426 \fBRSolictS\fR \fB32\fR Router Solicitation Address, IP.
427 \fBStaticRt\fR \fB33\fR T{
428 Static Route, Double IP (network router).
429 T}
430 \fBTrailerF\fR \fB34\fR Trailer Encapsulation, NUMBER.
431 \fBArpTimeO\fR \fB35\fR ARP Cache Time out, NUMBER.
432 \fBEthEncap\fR \fB36\fR Ethernet Encapsulation, NUMBER.
433 \fBTcpTTL\fR \fB37\fR TCP Default Time to Live, NUMBER.
434 \fBTcpKaInt\fR \fB38\fR TCP Keepalive Interval, NUMBER.
435 \fBTcpKaGbF\fR \fB39\fR TCP Keepalive Garbage, NUMBER.
436 \fBNISdmain\fR \fB40\fR NIS Domain name, ASCII.
437 \fBNISservs\fR \fB41\fR List of NIS servers, IP.
438 \fBNTPservs\fR \fB42\fR List of NTP servers, IP.
439 \fBNetBNms\fR \fB44\fR List of NetBIOS Name servers, IP.
440 \fBNetBDsts\fR \fB45\fR T{
441 List of NetBIOS Distribution servers, IP.
442 T}
443 \fBNetBNdT\fR \fB46\fR T{
444 NetBIOS Node type (1=B-node, 2=P, 4=M, 8=H).
445 T}
446 \fBNetBScop\fR \fB47\fR NetBIOS scope, ASCII.
447 \fBXFontSrv\fR \fB48\fR List of X Window Font servers, IP.
448 \fBXDispMgr\fR \fB49\fR List of X Window Display managers, IP.
449 \fBLeaseTim\fR \fB51\fR Lease Time Policy, (-1 = PERM), NUMBER.
450 \fBMessage\fR \fB56\fR T{
451 Message to be displayed on client, ASCII.
452 T}
453 \fBT1Time\fR \fB58\fR Renewal (T1) time, NUMBER.
454 \fBT2Time\fR \fB59\fR Rebinding (T2) time, NUMBER.
455 \fBNW_dmain\fR \fB62\fR NetWare/IP Domain Name, ASCII.
456 \fBNWIPOpts\fR \fB63\fR T{
457 NetWare/IP Options, OCTET (unknown type).
458 T}
459 \fBNIS+dom\fR \fB64\fR NIS+ Domain name, ASCII.
460 \fBNIS+serv\fR \fB65\fR NIS+ servers, IP.
461 \fBTFTPsrvN\fR \fB66\fR TFTP server hostname, ASCII.
462 \fBOptBootF\fR \fB67\fR Optional Bootfile path, ASCII.
463 \fBMblIPAgt\fR \fB68\fR Mobile IP Home Agent, IP.
464 \fBSMTPserv\fR \fB69\fR T{
465 Simple Mail Transport Protocol Server, IP.
466 T}
467 \fBPOP3serv\fR \fB70\fR Post Office Protocol (POP3) Server, IP.
468 \fBNNTPserv\fR \fB71\fR T{
469 Network News Transport Proto. (NNTP) Server, IP.
470 T}
471 \fBWWWservs\fR \fB72\fR Default WorldWideWeb Server, IP.
472 \fBFingersv\fR \fB73\fR Default Finger Server, IP.
473 \fBIRCservs\fR \fB74\fR Internet Relay Chat Server, IP.
474 \fBSTservs\fR \fB75\fR StreetTalk Server, IP.
475 \fBSTDAservs\fR \fB76\fR StreetTalk Directory Assist. Server, IP.
476 \fBUserClas\fR \fB77\fR User class information, ASCII.
477 \fBSLP_DA\fR \fB78\fR Directory agent, OCTET.
478 \fBSLP_SS\fR \fB79\fR Service scope, OCTET.
479 \fBClientFQDN\fR \fB81\fR Fully Qualified Domain Name, OCTET.
480 \fBAgentOpt\fR \fB82\fR Agent circuit ID, OCTET.
481 \fBFQDN\fR \fB89\fR Fully Qualified Domain Name, OCTET.
482 \fBPXEarch\fR \fB93\fR Client system architecture, NUMBER.
483 \fBBootFile\fR \fBN/A\fR File to Boot, ASCII.
484 \fBBootPath\fR \fBN/A\fR T{
485 Boot path prefix to apply to client's requested boot file, ASCII.
486 T}
487 \fBBootSrvA\fR \fBN/A\fR Boot Server, IP.
488 \fBBootSrvN\fR \fBN/A\fR Boot Server Hostname, ASCII.
489 \fBEchoVC\fR \fBN/A\fR T{
490 Echo Vendor Class Identifier Flag, (Present=\fBTRUE\fR)
491 T}
492 \fBLeaseNeg\fR \fBN/A\fR Lease is Negotiable Flag, (Present=\fBTRUE\fR)
493 .TE
494
495 .SS "Mnemonic Identifiers for IPv6 Options"
496 .sp
497 .LP
498 The following table maps the mnemonic identifiers used in Solaris DHCP to RFC
499 3315, 3319, 3646, 3898, 4075, and 4280 options:
500 .sp
501
502 .sp
503 .TS
504 c c c
505 l l l .
506 \fISymbol\fR \fICode\fR \fIDescription\fR
507 _
508 \fBClientID\fR \fB1\fR Unique identifier for client, DUID
509 \fBServerID\fR \fB2\fR Unique identifier for server, DUID
510 \fBPreference\fR \fB7\fR Server preference, NUMBER
511 \fBUnicast\fR \fB12\fR Unicast server address, IPV6
512 \fBUserClass\fR \fB15\fR User classes for client, OCTET
513 \fBVendorClass\fR \fB16\fR Vendor client hardware items, OCTET
514 \fBSIPNames\fR \fB21\fR SIP proxy server name list, DOMAIN
515 \fBSIPAddresses\fR \fB22\fR T{
516 SIP proxy server addresses in preference order, IPV6
517 T}
518 \fBDNSAddresses\fR \fB23\fR T{
519 DNS server addresses in preference order, IPV6
520 T}
521 \fBDNSSearch\fR \fB24\fR DNS search list, DOMAIN
522 \fBNISServers\fR \fB27\fR T{
523 NIS server addresses in preference order, IPV6
524 T}
525 \fBNIS+Servers\fR \fB28\fR T{
526 NIS+ server addresses in preference order, IPV6
527 T}
528 \fBNISDomain\fR \fB29\fR NIS domain name, DOMAIN
529 \fBNIS+Domain\fR \fB30\fR NIS+ domain name, DOMAIN
530 \fBSNTPServers\fR \fB31\fR IPV6
531 \fBInfoRefresh\fR \fB32\fR UNUMBER32
532 \fBBCMCDomain\fR \fB33\fR T{
533 Broadcast/multicast control server name list, DOMAIN
534 T}
535 \fBBCMCAddresses\fR \fB34\fR T{
536 Broadcast/multicast control server addresses, IPV6
537 T}
538 .TE
539
540 .SH EXAMPLES
541 .LP
542 \fBExample 1 \fRAltering the DHCP \fBinittab\fR File
543 .sp
544 .LP
545 In general, the \fBDHCP\fR \fBinittab\fR file should only be altered to add
546 \fBSITE\fR options. If other options are added, they will not be automatically
547 carried forward when the system is upgraded. For instance:
548
549 .sp
550 .in +2
551 .nf
552 ipPairs SITE, 132, IP, 2, 0, sdmi
553 .fi
554 .in -2
555
556 .sp
557 .LP
558 describes an option named \fBipPairs\fR, that is in the \fBSITE\fR category.
559 That is, it is defined by each individual site, and is option code 132, which
560 is of type \fBIP\fR Address, consisting of a potentially infinite number of
561 pairs of \fBIP\fR addresses.
562
563 .SH FILES
564 .br
565 .in +2
566 \fB/etc/dhcp/inittab\fR
567 .in -2
568 .br
569 .in +2
570 \fB/etc/dhcp/inittabv6\fR
571 .in -2
572 .SH ATTRIBUTES
573 .sp
574 .LP
575 See \fBattributes\fR(5) for descriptions of the following attributes:
576 .sp
577
578 .sp
579 .TS
580 box;
581 c | c
582 l | l .
583 ATTRIBUTE TYPE ATTRIBUTE VALUE
584 _
585 Interface Stability Committed
586 .TE
587
588 .SH SEE ALSO
589 .sp
590 .LP
591 \fBdhcpinfo\fR(1),\fBdhcpagent\fR(1M), \fBisspace\fR(3C), \fBdhcptab\fR(4),
592 \fBattributes\fR(5), \fBdhcp\fR(5), \fBdhcp_modules\fR(5)
593 .sp
594 .LP
595 \fISystem Administration Guide: IP Services\fR
596 .sp
597 .LP
598 Alexander, S., and R. Droms. \fIRFC 2132, DHCP Options and BOOTP Vendor
599 Extensions\fR. Network Working Group. March 1997.
600 .sp
601 .LP
602 Droms, R. \fI RFC 2131, Dynamic Host Configuration Protocol\fR. Network Working
603 Group. March 1997.
604 .sp
605 .LP
606 Droms, R. \fIRFC 3315, Dynamic Host Configuration Protocol for IPv6
607 (DHCPv6)\fR. Cisco Systems. July 2003.
608 .sp
609 .LP
610 Schulzrinne, H., and B. Volz. \fIRFC 3319, Dynamic Host Configuration Protocol
611 (DHCPv6) Options for Session Initiation Protocol (SIP) Servers\fR. Columbia
612 University and Ericsson. July 2003.
613 .sp
614 .LP
615 Droms, R. \fIRFC 3646, DNS Configuration options for Dynamic Host Configuration
616 Protocol for IPv6 (DHCPv6)\fR. Cisco Systems. December 2003.
617 .sp
618 .LP
619 Kalusivalingam, V. \fIRFC 3898, Network Information Service (NIS) Configuration
620 Options for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)\fR. Cisco
621 Systems. October 2004.
622 .sp
623 .LP
624 Chowdhury, K., P. Yegani, and L. Madour. \fIRFC 4280, Dynamic Host
625 Configuration Protocol (DHCP) Options for Broadcast and Multicast Control
626 Servers\fR. Starent Networks, Cisco Systems, and Ericsson. November 2005.
627 .sp
628 .LP
629 Mockapetris, P.V. \fIRFC 1035, Domain names - implementation and
630 specification\fR. ISI. November 1987.