Internet Protocol Version 6 (IPv6) Parameters
2023-11-13
Next Header Types
This registry has been closed in favor of the IPv6 Extension Header Types
registry, also located at .
Destination Options and Hop-by-Hop Options
IESG Approval, IETF Review or Standards Action
From IPv6 Option Types are 8-bit values,
structured as three subfields, are defined in Section 4.2 of
.
Each distinct 8-bit Option Type identifies a different option, i.e., the
high-order 3 bits are considered part of the option identification.
However, it is recommended that Option Types be assigned with distinct
values in the "rest" subfield, until and unless that 5-bit space becomes
full.
0x00
00
0
00000
Pad1
0x01
00
0
00001
PadN
0xC2
11
0
00010
Jumbo Payload
0x23
00
1
00011
RPL Option
0x63
01
1
00011
RPL Option (DEPRECATED)
0x04
00
0
00100
Tunnel Encapsulation Limit
0x05
00
0
00101
Router Alert
0x26
00
1
00110
Quick-Start
0x07
00
0
00111
CALIPSO
0x08
00
0
01000
SMF_DPD
0xC9
11
0
01001
Home Address
0x8A
10
0
01010
Endpoint Identification (DEPRECATED)
[CHARLES LYNN]
0x8B
10
0
01011
ILNP Nonce
0x8C
10
0
01100
Line-Identification Option
0x4D
01
0
01101
Deprecated
0x6D
01
1
01101
MPL Option
0xEE
11
1
01110
IP_DFF
0x0F
00
0
01111
Performance and Diagnostic Metrics (PDM)
0x30
00
1
10000
Minimum Path MTU Hop-by-Hop Option
0x11
00
0
10001
IOAM Destination Option and IOAM Hop-by-Hop Option
0x31
00
1
10001
IOAM Destination Option and IOAM Hop-by-Hop Option
0x12
00
0
10010
AltMark
10011-11101
Unassigned
0x1E
00
0
11110
RFC3692-style Experiment [1]
0x3E
00
1
11110
RFC3692-style Experiment [1]
0x5E
01
0
11110
RFC3692-style Experiment [1]
0x7E
01
1
11110
RFC3692-style Experiment [1]
0x9E
10
0
11110
RFC3692-style Experiment [1]
0xBE
10
1
11110
RFC3692-style Experiment [1]
0xDE
11
0
11110
RFC3692-style Experiment [1]
0xFE
11
1
11110
RFC3692-style Experiment [1]
11111
Unassigned
It is only appropriate to use these values in explicitly-configured experiments;
they MUST NOT be shipped as defaults in implementations. See for details.
Routing Types
IETF Review or IESG Approval
For Traffic Class related information, please see ,,
and .
For IPv6 Router Alert Option Values, please see:
0
Source Route (DEPRECATED)
1
Nimrod (DEPRECATED 2009-05-06)
2
Type 2 Routing Header
3
RPL Source Route Header
4
Segment Routing Header (SRH)
5
CRH-16 (TEMPORARY - registered 2021-06-07, extension registered 2023-06-08, expires 2024-06-07)
6
CRH-32 (TEMPORARY - registered 2021-06-07, extension registered 2023-06-08, expires 2024-06-07)
7-252
Unassigned
253
RFC3692-style Experiment 1 [2]
254
RFC3692-style Experiment 2 [2]
255
Reserved
It is only appropriate to use these values in explicitly-configured
experiments; they MUST NOT be shipped as defaults in implementations.
See for details.
RPL-option-TLV
IETF Review
0-254
Unassigned
255
Reserved
TaggerId Types
IETF Review
0
NULL
No TaggerId field is present
1
DEFAULT
A TaggerId of non-specific context is present
2
IPv4
A TaggerId representing an IPv4 address is present
3
IPv6
A TaggerId representing an IPv6 address is present
4-7
Unassigned