DHCPのオプション

Tag Name Meaning ISC dhcp option Length Reference
0 Pad None pad 0 [RFC2132]
1 Subnet Mask Subnet Mask Value subnet-mask 4 [RFC2132]
2 Time Offset Time Offset in Seconds from UTC (note: deprecated by 100 and 101) time-offset 4 [RFC2132],[RFC4833]
3 Router Router addresses routers N/4 [RFC2132]
4 Time Server Timeserver addresses time-servers N [RFC2132]
5 Name Server IEN-116 Server addresses ien116-name-servers N [RFC2132]
6 Domain Server DNS Server addresses domain-name-servers N [RFC2132]
7 Log Server Logging Server addresses log-servers N [RFC2132]
8 Quotes Server Quotes Server addresses cookie-servers N [RFC2132]
9 LPR Server Printer Server addresses lpr-servers N [RFC2132]
10 Impress Server Impress Server addresses impress-servers N [RFC2132]
11 RLP Server RLP Server addresses resource-location-servers N [RFC2132]
12 Hostname Hostname string host-name N [RFC2132]
13 Boot File Size Size of boot file in 512 byte chunks boot-size 2 [RFC2132]
14 Merit Dump File Client to dump and name the file to dump it to merit-dump N [RFC2132]
15 Domain Name The DNS domain name of the client domain-name N [RFC2132]
16 Swap Server Swap Server addeess swap-server N [RFC2132]
17 Root Path Path name for root disk root-path N [RFC2132]
18 Extension File Path name for more BOOTP info extensions-path N [RFC2132]
19 Forward On/Off Enable/Disable IP Forwarding ip-forwarding 1 [RFC2132]
20 SrcRte On/Off Enable/Disable Source Routing non-local-source-routing 1 [RFC2132]
21 Policy Filter Routing Policy Filters policy-filter N [RFC2132]
22 Max DG Assembly Max Datagram Reassembly Size max-dgram-reassembly 2 [RFC2132]
23 Default IP TTL Default IP Time to Live default-ip-ttl 1 [RFC2132]
24 MTU Timeout Path MTU Aging Timeout path-mtu-aging-timeout 4 [RFC2132]
25 MTU Plateau Path MTU Plateau Table path-mtu-plateau-table N [RFC2132]
26 MTU Interface Interface MTU Size interface-mtu 2 [RFC2132]
27 MTU Subnet All Subnets are Local all-subnets-local 1 [RFC2132]
28 Broadcast Address Broadcast Address broadcast-address 4 [RFC2132]
29 Mask Discovery Perform Mask Discovery perform-mask-discovery 1 [RFC2132]
30 Mask Supplier Provide Mask to Others mask-supplier 1 [RFC2132]
31 Router Discovery Perform Router Discovery router-discovery 1 [RFC2132]
32 Router Request Router Solicitation Address router-solicitation-address 4 [RFC2132]
33 Static Route Static Routing Table static-routes N [RFC2132]
34 Trailers Trailer Encapsulation trailer-encapsulation 1 [RFC2132]
35 ARP Timeout ARP Cache Timeout arp-cache-timeout 4 [RFC2132]
36 Ethernet Ethernet Encapsulation ieee802-3-encapsulation 1 [RFC2132]
37 Default TCP TTL Default TCP Time to Live default-tcp-ttl 1 [RFC2132]
38 Keepalive Time TCP Keepalive Interval tcp-keepalive-interval 4 [RFC2132]
39 Keepalive Data TCP Keepalive Garbage tcp-keepalive-garbage 1 [RFC2132]
40 NIS Domain NIS Domain Name nis-domain N [RFC2132]
41 NIS Servers NIS Server Addresses nis-servers N [RFC2132]
42 NTP Servers NTP Server Addresses ntp-servers N [RFC2132]
43 Vendor Specific Vendor Specific Information vendor-encapsulated-options N [RFC2132]
44 NETBIOS Name Srv NETBIOS Name Servers netbios-name-servers N [RFC2132]
45 NETBIOS Dist Srv NETBIOS Datagram Distribution netbios-dd-server N [RFC2132]
46 NETBIOS Node Type NETBIOS Node Type netbios-node-type 1 [RFC2132]
47 NETBIOS Scope NETBIOS Scope netbios-scope N [RFC2132]
48 X Window Font X Window Font Server font-servers N [RFC2132]
49 X Window Manager X Window Display Manager x-display-manager N [RFC2132]
50 Address Request Requested IP Address dhcp-requested-address 4 [RFC2132]
51 Address Time IP Address Lease Time dhcp-lease-time 4 [RFC2132]
52 Overload Overload "sname" or "file" dhcp-option-overload 1 [RFC2132]
53 DHCP Msg Type DHCP Message Type dhcp-message-type 1 [RFC2132]
54 DHCP Server Id DHCP Server Identification dhcp-server-identifier 4 [RFC2132]
55 Parameter List Parameter Request List dhcp-parameter-request-list N [RFC2132]
56 DHCP Message DHCP Error Message dhcp-message N [RFC2132]
57 DHCP Max Msg Size DHCP Maximum Message Size dhcp-max-message-size 2 [RFC2132]
58 Renewal Time DHCP Renewal (T1) Time dhcp-renewal-time 4 [RFC2132]
59 Rebinding Time DHCP Rebinding (T2) Time dhcp-rebinding-time 4 [RFC2132]
60 Class Id Class Identifier vendor-class-identifier N [RFC2132]
61 Client Id Client Identifier dhcp-client-identifier N [RFC2132]
62 Netware/IP Domain Netware/IP Domain Name nwip-domain N [RFC2242]
63 Netware/IP Option Netware/IP sub Options nwip-suboptions N [RFC2242]
64 NIS-Domain-Name NIS+ v3 Client Domain Name nisplus-domain N [RFC2132]
65 NIS-Server-Addr NIS+ v3 Server Addresses nisplus-servers N [RFC2132]
66 Server-Name TFTP Server Name tftp-server-name N [RFC2132]
67 Bootfile-Name Boot File Name bootfile-name N [RFC2132]
68 Home-Agent-Addrs Home Agent Addresses mobile-ip-home-agent N [RFC2132]
69 SMTP-Server Simple Mail Server Addresses smtp-server N [RFC2132]
70 POP3-Server Post Office Server Addresses pop-server N [RFC2132]
71 NNTP-Server Network News Server Addresses nntp-server N [RFC2132]
72 WWW-Server WWW Server Addresses www-server N [RFC2132]
73 Finger-Server Finger Server Addresses finger-server N [RFC2132]
74 IRC-Server Chat Server Addresses irc-server N [RFC2132]
75 StreetTalk-Server StreetTalk Server Addresses streettalk-server N [RFC2132]
76 STDA-Server ST Directory Assist. Addresses streettalk-directory-assistance-server N [RFC2132]
77 User-Class User Class Information user-class N [RFC3004]
78 Directory Agent directory agent information slp-directory-agent N [RFC2610]
79 Service Scope service location agent scope slp-service-scope N [RFC2610]
80 Rapid Commit Rapid Commit unknown-80 0 [RFC4039]
81 Client FQDN Fully Qualified Domain Name fqdn N [RFC4702]
82 Relay Agent Information Relay Agent Information relay-agent-information N [RFC3046]
83 iSNS Internet Storage Name Service unknown-83 N [RFC4174]
84 REMOVED/Unassigned - unknown-84 - [RFC3679]
85 NDS Servers Novell Directory Services nds-servers N [RFC2241]
86 NDS Tree Name Novell Directory Services nds-tree-name N [RFC2241]
87 NDS Context Novell Directory Services nds-context N [RFC2241]
88 BCMCS Controller Domain Name list - unknown-88 - [RFC4280]
89 BCMCS Controller IPv4 address option - unknown-89 - [RFC4280]
90 Authentication Authentication unknown-90 N [RFC3118]
91 client-last-transaction-time option - unknown-91 - [RFC4388]
92 associated-ip option - unknown-92 - [RFC4388]
93 Client System Client System Architecture unknown-93 N [RFC4578]
94 Client NDI Client Network Device Interface unknown-94 N [RFC4578]
95 LDAP Lightweight Directory Access Protocol unknown-95 N [RFC3679]
96 REMOVED/Unassigned - unknown-96 - [RFC3679]
97 UUID/GUID UUID/GUID-based Client Identifier unknown-97 N [RFC4578]
98 User-Auth Open Group's User Authentication uap-servers N [RFC2485]
99 GEOCONF_CIVIC - unknown-99 - [RFC4776]
100 PCode IEEE 1003.1 TZ String unknown-100 N [RFC4833]
101 TCode Reference to the TZ Database unknown-101 N [RFC4833]
102-107 REMOVED/Unassigned - - - [RFC3679]
108 REMOVED/Unassigned - unknown-108 - [RFC3679]
109 Unassigned - unknown-109 - [RFC3679]
110 REMOVED/Unassigned - unknown-110 - [RFC3679]
111 Unassigned - unknown-111 - [RFC3679]
112 Netinfo Address NetInfo Parent Server Address unknown-112 N [RFC3679]
113 Netinfo Tag NetInfo Parent Server Tag unknown-113 N [RFC3679]
114 URL URL unknown-114 N [RFC3679]
115 REMOVED/Unassigned - unknown-115 - [RFC3679]
116 Auto-Config DHCP Auto-Configuration unknown-116 N [RFC2563]
117 Name Service Search Name Service Search unknown-117 N [RFC2937]
118 Subnet Selection Option Subnet Selection Option subnet-selection 4 [RFC3011]
119 Domain Search DNS domain search list unknown-119 N [RFC3397]
120 SIP Servers DHCP Option SIP Servers DHCP Option unknown-120 N [RFC3361]
121 Classless Static Route Option Classless Static Route Option unknown-121 N [RFC3442]
122 CCC CableLabs Client Configuration unknown-122 N [RFC3495]
123 GeoConf Option GeoConf Option unknown-123 16 [RFC3825]
124 V-I Vendor Class Vendor-Identifying Vendor Class Information unknown-124 - [RFC3925]
125 V-I Vendor-Specific Vendor-Identifying Vendor-Specific Information unknown-125 - [RFC3925]
126 Removed/Unassigned - unknown-126 - [RFC3679]
127 Removed/Unassigned - unknown-127 - [RFC3679]
128 PXE Etherboot signature. 6 bytes: E4:45:74:68:00:00 DOCSIS "full security" server IP address TFTP Server IP address (for IP Phone software load) - unknown-128 - [RFC4578]
129 PXE Kernel options. Variable length string Call Server IP address - unknown-129 - [RFC4578]
130 PXE Ethernet interface. Variable length string. Discrimination string (to identify vendor) - unknown-130 - [RFC4578]
131 PXE Remote statistics server IP address - unknown-131 - [RFC4578]
132 PXE IEEE 802.1Q VLAN ID - unknown-132 - [RFC4578]
133 PXE IEEE 802.1D/p Layer 2 Priority - unknown-133 - [RFC4578]
134 PXE Diffserv Code Point (DSCP) for VoIP signalling and media streams - unknown-134 - [RFC4578]
135 PXE HTTP Proxy for phone-specific applications - unknown-135 - [RFC4578]
136 OPTION_PANA_AGENT - unknown-136 - [RFC-ietf-dhc-paa-option-05.txt]
137-149 Unassigned - - - [RFC3942]
150 TFTP server address Etherboot GRUB configuration path name - unknown-150 - -
151-174 Unassigned - - - [RFC3942]
175 Etherboot - unknown-175 - -
176 IP Telephone - unknown-176 - -
177 Etherboot PacketCable and CableHome (replaced by 122) - unknown-177 - -
178-207 Unassigned - - - [RFC3942]
208 pxelinux.magic (string) = F1:00:74:7E (241.0.116.126) - unknown-208 - -
209 pxelinux.configfile (text) - unknown-209 - -
210 pxelinux.pathprefix (text) - authenticate - -
211 pxelinux.reboottime (unsigned integer 32 bits) - unknown-211 - -
212-219 Unassigned - - - -
220 Subnet Allocation Option - unknown-220 - -
221 Virtual Subnet Selection Option - unknown-221 - -
222-223 Unassigned - - - [RFC3942]
224-254 Private Use - - - -
255 End None option-end 0 [RFC2132]