Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Created

  • 2003-11-03

Last Updated

  • 2026-09-01

Note

For the Civic Address Types Registry RFC 4776, please see: http://www.iana.org/assignments/civic-address-types-registry

Available Formats

Message Types

Registration Procedure(s)

  • Standards Action

Reference

  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Value Description Status Reference
0 Reserved
1 SOLICIT RFC 9915
2 ADVERTISE RFC 9915
3 REQUEST RFC 9915
4 CONFIRM RFC 9915
5 RENEW RFC 9915
6 REBIND RFC 9915
7 REPLY RFC 9915
8 RELEASE RFC 9915
9 DECLINE RFC 9915
10 RECONFIGURE RFC 9915
11 INFORMATION-REQUEST RFC 9915
12 RELAY-FORW RFC 9915
13 RELAY-REPL RFC 9915
14 LEASEQUERY RFC 5007
15 LEASEQUERY-REPLY RFC 5007
16 LEASEQUERY-DONE RFC 5460
17 LEASEQUERY-DATA RFC 5460
18 RECONFIGURE-REQUEST RFC 6977
19 RECONFIGURE-REPLY RFC 6977
20 DHCPV4-QUERY RFC 7341
21 DHCPV4-RESPONSE RFC 7341
22 ACTIVELEASEQUERY RFC 7653
23 STARTTLS RFC 7653
24 BNDUPD RFC 8156
25 BNDREPLY RFC 8156
26 POOLREQ RFC 8156
27 POOLRESP RFC 8156
28 UPDREQ RFC 8156
29 UPDREQALL RFC 8156
30 UPDDONE RFC 8156
31 CONNECT RFC 8156
32 CONNECTREPLY RFC 8156
33 DISCONNECT RFC 8156
34 STATE RFC 8156
35 CONTACT RFC 8156
36 ADDR-REG-INFORM RFC 9686
37 ADDR-REG-REPLY RFC 9686
38-255 Unassigned

Option Codes

Registration Procedure(s)

  • Expert Review and Standards Action

Expert(s)

  • Ted Lemon, Bernie Volz, Tomek Mrugalski

Reference

  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Note

For the "Client ORO" column: a "Yes" for an option means that the client includes this option code in the Option Request option (see Section 21.7 of RFC 9915) if it desires that configuration information; a "No" means that the option MUST NOT be included (and servers SHOULD silently ignore that option code if it appears in a client's Option Request option).

Available Formats

Value Description Client ORO Singleton Option Status Reference
0 Reserved
1 OPTION_CLIENTID No Yes RFC 9915
2 OPTION_SERVERID No Yes RFC 9915
3 OPTION_IA_NA No No RFC 9915
4 OPTION_IA_TA No No Obsolete RFC 9915
5 OPTION_IAADDR No No RFC 9915
6 OPTION_ORO No Yes RFC 9915
7 OPTION_PREFERENCE No Yes RFC 9915
8 OPTION_ELAPSED_TIME No Yes RFC 9915
9 OPTION_RELAY_MSG No Yes RFC 9915
10 Unassigned No Yes
11 OPTION_AUTH No Yes RFC 9915
12 OPTION_UNICAST No Yes Obsolete RFC 9915
13 OPTION_STATUS_CODE No Yes RFC 9915
14 OPTION_RAPID_COMMIT No Yes RFC 9915
15 OPTION_USER_CLASS No Yes RFC 9915
16 OPTION_VENDOR_CLASS No No[1] RFC 9915
17 OPTION_VENDOR_OPTS Optional No[1] RFC 9915
18 OPTION_INTERFACE_ID No Yes RFC 9915
19 OPTION_RECONF_MSG No Yes RFC 9915
20 OPTION_RECONF_ACCEPT No Yes RFC 9915
21 OPTION_SIP_SERVER_D Yes Yes RFC 3319
22 OPTION_SIP_SERVER_A Yes Yes RFC 3319
23 OPTION_DNS_SERVERS Yes Yes RFC 3646
24 OPTION_DOMAIN_LIST Yes Yes RFC 3646
25 OPTION_IA_PD No No RFC 3633; RFC 9915
26 OPTION_IAPREFIX No No RFC 3633; RFC 9915
27 OPTION_NIS_SERVERS Yes Yes RFC 3898
28 OPTION_NISP_SERVERS Yes Yes RFC 3898
29 OPTION_NIS_DOMAIN_NAME Yes Yes RFC 3898
30 OPTION_NISP_DOMAIN_NAME Yes Yes RFC 3898
31 OPTION_SNTP_SERVERS Yes Yes RFC 4075
32 OPTION_INFORMATION_REFRESH_TIME Required for Information-request Yes RFC 4242; RFC 9915
33 OPTION_BCMCS_SERVER_D Yes Yes RFC 4280
34 OPTION_BCMCS_SERVER_A Yes Yes RFC 4280
35 Unassigned Yes Yes
36 OPTION_GEOCONF_CIVIC Yes Yes RFC 4776
37 OPTION_REMOTE_ID No Yes RFC 4649
38 OPTION_SUBSCRIBER_ID No Yes RFC 4580
39 OPTION_CLIENT_FQDN Yes Yes RFC 4704
40 OPTION_PANA_AGENT Yes Yes RFC 5192
41 OPTION_NEW_POSIX_TIMEZONE Yes Yes RFC 4833
42 OPTION_NEW_TZDB_TIMEZONE Yes Yes RFC 4833
43 OPTION_ERO No Yes RFC 4994
44 OPTION_LQ_QUERY No Yes RFC 5007
45 OPTION_CLIENT_DATA No Yes RFC 5007
46 OPTION_CLT_TIME No Yes RFC 5007
47 OPTION_LQ_RELAY_DATA No Yes RFC 5007
48 OPTION_LQ_CLIENT_LINK No Yes RFC 5007
49 OPTION_MIP6_HNIDF Yes Yes RFC 6610
50 OPTION_MIP6_VDINF Yes Yes RFC 6610
51 OPTION_V6_LOST Yes Yes RFC 5223
52 OPTION_CAPWAP_AC_V6 Yes Yes RFC 5417
53 OPTION_RELAY_ID No Yes RFC 5460
54 OPTION-IPv6_Address-MoS Yes Yes RFC 5678
55 OPTION-IPv6_FQDN-MoS Yes Yes RFC 5678
56 OPTION_NTP_SERVER Yes Yes RFC 5908
57 OPTION_V6_ACCESS_DOMAIN Yes Yes RFC 5986
58 OPTION_SIP_UA_CS_LIST Yes Yes RFC 6011
59 OPT_BOOTFILE_URL Yes Yes RFC 5970
60 OPT_BOOTFILE_PARAM Yes Yes RFC 5970
61 OPTION_CLIENT_ARCH_TYPE No Yes RFC 5970
62 OPTION_NII Yes Yes RFC 5970
63 OPTION_GEOLOCATION Yes Yes RFC 6225
64 OPTION_AFTR_NAME Yes Yes RFC 6334
65 OPTION_ERP_LOCAL_DOMAIN_NAME Yes Yes RFC 6440
66 OPTION_RSOO No Yes RFC 6422
67 OPTION_PD_EXCLUDE Yes Yes RFC 6603
68 OPTION_VSS No Yes RFC 6607
69 OPTION_MIP6_IDINF Yes Yes RFC 6610
70 OPTION_MIP6_UDINF Yes Yes RFC 6610
71 OPTION_MIP6_HNP Yes Yes RFC 6610
72 OPTION_MIP6_HAA Yes Yes RFC 6610
73 OPTION_MIP6_HAF Yes Yes RFC 6610
74 OPTION_RDNSS_SELECTION Yes Yes RFC 6731
75 OPTION_KRB_PRINCIPAL_NAME Yes Yes RFC 6784
76 OPTION_KRB_REALM_NAME Yes Yes RFC 6784
77 OPTION_KRB_DEFAULT_REALM_NAME Yes Yes RFC 6784
78 OPTION_KRB_KDC Yes Yes RFC 6784
79 OPTION_CLIENT_LINKLAYER_ADDR No Yes RFC 6939
80 OPTION_LINK_ADDRESS No Yes RFC 6977
81 OPTION_RADIUS No Yes RFC 7037
82 OPTION_SOL_MAX_RT Required for Solicit Yes RFC 7083; RFC 9915
83 OPTION_INF_MAX_RT Required for Information-request Yes RFC 7083; RFC 9915
84 OPTION_ADDRSEL Yes Yes RFC 7078
85 OPTION_ADDRSEL_TABLE Yes Yes RFC 7078
86 OPTION_V6_PCP_SERVER Yes No RFC 7291
87 OPTION_DHCPV4_MSG No Yes RFC 7341
88 OPTION_DHCP4_O_DHCP6_SERVER Yes Yes RFC 7341
89 OPTION_S46_RULE No No[2] RFC 7598
90 OPTION_S46_BR Yes No RFC 7598; RFC 8539
91 OPTION_S46_DMR No Yes RFC 7598
92 OPTION_S46_V4V6BIND No Yes RFC 7598
93 OPTION_S46_PORTPARAMS No Yes RFC 7598
94 OPTION_S46_CONT_MAPE Yes No RFC 7598
95 OPTION_S46_CONT_MAPT Yes Yes RFC 7598
96 OPTION_S46_CONT_LW Yes Yes RFC 7598
97 OPTION_4RD Yes Yes RFC 7600
98 OPTION_4RD_MAP_RULE Yes Yes RFC 7600
99 OPTION_4RD_NON_MAP_RULE Yes Yes RFC 7600
100 OPTION_LQ_BASE_TIME No Yes RFC 7653
101 OPTION_LQ_START_TIME No Yes RFC 7653
102 OPTION_LQ_END_TIME No Yes RFC 7653
103 DHCP Captive-Portal Yes Yes RFC 8910
104 OPTION_MPL_PARAMETERS Yes No RFC 7774
105 OPTION_ANI_ATT No Yes RFC 7839
106 OPTION_ANI_NETWORK_NAME No Yes RFC 7839
107 OPTION_ANI_AP_NAME No Yes RFC 7839
108 OPTION_ANI_AP_BSSID No Yes RFC 7839
109 OPTION_ANI_OPERATOR_ID No Yes RFC 7839
110 OPTION_ANI_OPERATOR_REALM No Yes RFC 7839
111 OPTION_S46_PRIORITY Yes Yes RFC 8026
112 OPTION_MUD_URL_V6 No Yes RFC 8520
113 OPTION_V6_PREFIX64 Yes No RFC 8115
114 OPTION_F_BINDING_STATUS No Yes RFC 8156
115 OPTION_F_CONNECT_FLAGS No Yes RFC 8156
116 OPTION_F_DNS_REMOVAL_INFO No Yes RFC 8156
117 OPTION_F_DNS_HOST_NAME No Yes RFC 8156
118 OPTION_F_DNS_ZONE_NAME No Yes RFC 8156
119 OPTION_F_DNS_FLAGS No Yes RFC 8156
120 OPTION_F_EXPIRATION_TIME No Yes RFC 8156
121 OPTION_F_MAX_UNACKED_BNDUPD No Yes RFC 8156
122 OPTION_F_MCLT No Yes RFC 8156
123 OPTION_F_PARTNER_LIFETIME No Yes RFC 8156
124 OPTION_F_PARTNER_LIFETIME_SENT No Yes RFC 8156
125 OPTION_F_PARTNER_DOWN_TIME No Yes RFC 8156
126 OPTION_F_PARTNER_RAW_CLT_TIME No Yes RFC 8156
127 OPTION_F_PROTOCOL_VERSION No Yes RFC 8156
128 OPTION_F_KEEPALIVE_TIME No Yes RFC 8156
129 OPTION_F_RECONFIGURE_DATA No Yes RFC 8156
130 OPTION_F_RELATIONSHIP_NAME No Yes RFC 8156
131 OPTION_F_SERVER_FLAGS No Yes RFC 8156
132 OPTION_F_SERVER_STATE No Yes RFC 8156
133 OPTION_F_START_TIME_OF_STATE No Yes RFC 8156
134 OPTION_F_STATE_EXPIRATION_TIME No Yes RFC 8156
135 OPTION_RELAY_PORT No Yes RFC 8357
136 OPTION_V6_SZTP_REDIRECT Yes Yes RFC 8572
137 OPTION_S46_BIND_IPV6_PREFIX Yes Yes RFC 8539
138 OPTION_IA_LL No No RFC 8947
139 OPTION_LLADDR No No RFC 8947
140 OPTION_SLAP_QUAD No Yes RFC 8948
141 OPTION_V6_DOTS_RI Yes Yes RFC 8973
142 OPTION_V6_DOTS_ADDRESS Yes Yes RFC 8973
143 OPTION-IPv6_Address-ANDSF Yes Yes RFC 6153
144 OPTION_V6_DNR Yes No RFC 9463
145 OPTION_REGISTERED_DOMAIN Yes No RFC 9527, Section 4.1
146 OPTION_FORWARD_DIST_MANAGER Yes Yes RFC 9527, Section 4.2
147 OPTION_REVERSE_DIST_MANAGER Yes Yes RFC 9527, Section 4.3
148 OPTION_ADDR_REG_ENABLE Yes Yes RFC 9686
149 OPTION_IA_SRV6_LOCATOR No No RFC 10038
150 OPTION_IALOCATOR No No RFC 10038
151-65535 Unassigned

Status Codes

Registration Procedure(s)

  • Standards Action

Reference

  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Code Name Status Reference
0 Success RFC 9915
1 UnspecFail RFC 9915
2 NoAddrsAvail RFC 9915
3 NoBinding RFC 9915
4 NotOnLink RFC 9915
5 UseMulticast Obsolete RFC 9915
6 NoPrefixAvail RFC 3633; RFC 9915
7 UnknownQueryType RFC 5007
8 MalformedQuery RFC 5007
9 NotConfigured RFC 5007
10 NotAllowed RFC 5007
11 QueryTerminated RFC 5460
12 DataMissing RFC 7653
13 CatchUpComplete RFC 7653
14 NotSupported RFC 7653
15 TLSConnectionRefused RFC 7653
16 AddressInUse RFC 8156
17 ConfigurationConflict RFC 8156
18 MissingBindingInformation RFC 8156
19 OutdatedBindingInformation RFC 8156
20 ServerShuttingDown RFC 8156
21 DNSUpdateNotSupported RFC 8156
22 ExcessiveTimeSkew RFC 8156
23 NoSRv6LocatorAvail RFC 10038
24-65535 Unassigned

DUIDs

Registration Procedure(s)

  • Standards Action

Reference

  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Type Description Status Reference
1 DUID-LLT RFC 9915
2 DUID-EN RFC 9915
3 DUID-LL RFC 9915
4 DUID-UUID RFC 6355

OPTION_LQ_QUERY option

Registration Procedure(s)

  • Standards Action

Reference

  • RFC 5007: DHCPv6 Leasequery
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Code Name Status Reference
0 Reserved
1 QUERY_BY_ADDRESS RFC 5007
2 QUERY_BY_CLIENTID RFC 5007
3 QUERY_BY_RELAY_ID RFC 5460
4 QUERY_BY_LINK_ADDRESS RFC 5460
5 QUERY_BY_REMOTE_ID RFC 5460
6-255 Unassigned

IEEE 802.21 Service Type (MoS DHCPv6 Address and FQDN Sub-Options)

Registration Procedure(s)

  • Standards Action

Reference

  • RFC 5678: Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Options for IEEE 802.21 Mobility Services (MoS) Discovery
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Value Name Status Reference
0 Reserved RFC 5678
1 IS RFC 5678
2 CS RFC 5678
3 ES RFC 5678
4-65534 Unassigned
65535 Reserved RFC 5678

Processor Architecture Types

Registration Procedure(s)

  • Expert Review

Expert(s)

  • Vincent Zimmer, Bernie Volz, Tomek Mrugalski

Reference

  • RFC 5970: DHCPv6 Options for Network Boot
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Type Architecture Name Status Reference
0x00 0x00 x86 BIOS RFC 5970; RFC 4578
0x00 0x01 NEC/PC98 (DEPRECATED) RFC 5970; RFC 4578
0x00 0x02 Itanium RFC 5970; RFC 4578
0x00 0x03 DEC Alpha (DEPRECATED) RFC 5970; RFC 4578
0x00 0x04 Arc x86 (DEPRECATED) RFC 5970; RFC 4578
0x00 0x05 Intel Lean Client (DEPRECATED) RFC 5970; RFC 4578
0x00 0x06 x86 UEFI RFC 5970; RFC 4578
0x00 0x07 x64 UEFI RFC 5970; RFC 4578
0x00 0x08 EFI Xscale (DEPRECATED) RFC 5970; RFC 4578
0x00 0x09 EBC RFC 5970; RFC 4578
0x00 0x0a ARM 32-bit UEFI RFC 5970
0x00 0x0b ARM 64-bit UEFI RFC 5970
0x00 0x0c PowerPC Open Firmware Thomas Huth
0x00 0x0d PowerPC ePAPR Thomas Huth
0x00 0x0e POWER OPAL v3 Jeremy Kerr
0x00 0x0f x86 uefi boot from http Samer El-Haj-Mahmoud
0x00 0x10 x64 uefi boot from http Samer El-Haj-Mahmoud
0x00 0x11 ebc boot from http Samer El-Haj-Mahmoud
0x00 0x12 arm uefi 32 boot from http Samer El-Haj-Mahmoud
0x00 0x13 arm uefi 64 boot from http Samer El-Haj-Mahmoud
0x00 0x14 pc/at bios boot from http Samer El-Haj-Mahmoud
0x00 0x15 arm 32 uboot Joseph Shifflett
0x00 0x16 arm 64 uboot Joseph Shifflett
0x00 0x17 arm uboot 32 boot from http Joseph Shifflett
0x00 0x18 arm uboot 64 boot from http Joseph Shifflett
0x00 0x19 RISC-V 32-bit UEFI Dong Wei
0x00 0x1a RISC-V 32-bit UEFI boot from http Dong Wei
0x00 0x1b RISC-V 64-bit UEFI Dong Wei
0x00 0x1c RISC-V 64-bit UEFI boot from http Dong Wei
0x00 0x1d RISC-V 128-bit UEFI Dong Wei
0x00 0x1e RISC-V 128-bit UEFI boot from http Dong Wei
0x00 0x1f s390 Basic Hendrik Brueckner
0x00 0x20 s390 Extended Hendrik Brueckner
0x00 0x21 MIPS 32-bit UEFI Jiading Zhang
0x00 0x22 MIPS 64-bit UEFI Jiading Zhang
0x00 0x23 Sunway 32-bit UEFI Jiading Zhang
0x00 0x24 Sunway 64-bit UEFI Jiading Zhang
0x00 0x25 LoongArch 32-bit UEFI LI Chao; https://loongson.github.io/LoongArch-Documentation/README-EN.html; https://github.com/loongson/LoongArch-Documentation
0x00 0x26 LoongArch 32-bit UEFI boot from http LI Chao; https://loongson.github.io/LoongArch-Documentation/README-EN.html; https://github.com/loongson/LoongArch-Documentation
0x00 0x27 LoongArch 64-bit UEFI LI Chao; https://loongson.github.io/LoongArch-Documentation/README-EN.html; https://github.com/loongson/LoongArch-Documentation
0x00 0x28 LoongArch 64-bit UEFI boot from http LI Chao; https://loongson.github.io/LoongArch-Documentation/README-EN.html; https://github.com/loongson/LoongArch-Documentation
0x00 0x29 arm rpiboot Peter Harper; https://www.raspberrypi.com/documentation/computers/remote-access.html#network-booting-using-ipv6
0x00 0x2a-0xff 0xff Unassigned

Options Permitted in the Relay-Supplied Options Option

Registration Procedure(s)

  • IETF Review

Reference

  • RFC 6422: Relay-Supplied DHCP Options
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Value Description Status Reference
65 OPTION_ERP_LOCAL_DOMAIN_NAME RFC 6440

VSS Type Options

Registration Procedure(s)

  • IETF Review

Reference

  • RFC 6607: Virtual Subnet Selection Options for DHCPv4 and DHCPv6

Note

See the VSS Type Options registry at Dynamic Host Configuration Protocol (DHCP) and Bootstrap Protocol (BOOTP) Parameters

NTP Time Source Suboptions

Registration Procedure(s)

  • IETF Review

Reference

  • RFC 5908: Network Time Protocol (NTP) Server Option for DHCPv6
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Value Name Status Reference
1 NTP_SUBOPTION_SRV_ADDR RFC 5908
2 NTP_SUBOPTION_MC_ADDR RFC 5908
3 NTP_SUBOPTION_SRV_FQDN RFC 5908

RADIUS Attributes Permitted in DHCPv6 RADIUS Option

Registration Procedure(s)

  • Expert Review

Expert(s)

  • Bernie Volz, Tomek Mrugalski

Reference

  • RFC 7037: RADIUS Option for the DHCPv6 Relay Agent
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Type Code Attribute Status Reference
26 Vendor-Specific RFC 2865
123 Delegated-IPv6-Prefix RFC 4818
144 DS-Lite-Tunnel-Name RFC 6519
168 Framed-IPv6-Address RFC 6911
169 DNS-Server-IPv6-Address RFC 6911
171 Delegated-IPv6-Prefix-Pool RFC 6911
172 Stateful-IPv6-Address-Pool RFC 6911
245.3 DHCPv6-Options RFC 9445

Option Codes Permitted in the S46 Priority Option

Registration Procedure(s)

  • IETF Review

Reference

  • RFC 8026: Unified IPv4-in-IPv6 Softwire Customer Premises Equipment (CPE): A DHCPv6-Based Prioritization Mechanism
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Option Code S46 Mechanism Status Reference
64 DS-Lite RFC 6334
88 DHCPv4 over DHCPv6 RFC 7341
94 MAP-E RFC 7598
95 MAP-T RFC 7598
96 Lightweight 4over6 RFC 7598

Supported Transport

Registration Procedure(s)

  • RFC Required

Reference

  • RFC 9527: DHCPv6 Options for the Homenet Naming Authority
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Bit Position (least to most significant) Transport Protocol Description Mnemonic Status Reference
0 DNS over mutually authenticated TLS DomTLS RFC 9527
1-15 Unassigned

DHCPv6 Options Permitted in the RADIUS DHCPv6-Options Attribute

Registration Procedure(s)

  • Expert Review

Expert(s)

  • Alan DeKok, Mohamed Boucadair

Reference

  • RFC 9445: RADIUS Extensions for DHCP-Configured Services
  • RFC 9915: Dynamic Host Configuration Protocol for IPv6 (DHCPv6)

Available Formats

Value Description Status Reference
144 OPTION_V6_DNR RFC 9445

Contact Information

Name Contact URI Last Updated
Dong Wei dong.wei&arm.com 2022-06-24
Hendrik Brueckner brueckner&de.ibm.com 2023-07-25
Jeremy Kerr jeremy.kerr&au.ibm.com 2014-04-04
Jiading Zhang jdzhang&zd-tech.com.cn 2020-03-12
Joseph Shifflett joseph.shifflett&hp.com 2015-04-03
LI Chao lichao&loongson.cn 2021-10-26
Peter Harper peter.harper&raspberrypi.com 2021-12-23
Samer El-Haj-Mahmoud elhaj&hp.com 2014-06-04
Thomas Huth thuth&de.ibm.com 2012-06-06

Footnotes

[1]

For each enterprise-number, there MUST only be a single instance.
[2]

See RFC 7598 for details.