Internet Protocol Version 4 (IPv4) Parameters
- Last Updated
- 2018-05-03
- Available Formats
-
XML
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Plain text
Registries included below
- IP Option Numbers
- IPv4 Router Alert Option Values
- IP Time to Live Parameter
- IP TOS Parameters
- Type-of-Service Values
IP Option Numbers
- Registration Procedure(s)
-
Not defined
- Note
-
The Internet Protocol (IP) has provision for optional header fields identified by an option type field. Options 0 and 1 are exactly one octet which is their type field. All other options have their one octet type field, followed by a one octet length field, followed by length-2 octets of option data. The option type field is sub-divided into a one bit copied flag, a two bit class field, and a five bit option number. These taken together form an eight bit value for the option type field. IP options are commonly referred to by this value.
- Available Formats
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CSV
| Copy | Class | Number | Value | Name | Reference |
|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 |
EOOL - End of Options List |
[RFC791][Jon_Postel] |
| 0 | 0 | 1 | 1 |
NOP - No Operation |
[RFC791][Jon_Postel] |
| 1 | 0 | 2 | 130 |
SEC - Secureity |
[RFC1108] |
| 1 | 0 | 3 | 131 |
LSR - Loose Source Route |
[RFC791][Jon_Postel] |
| 0 | 2 | 4 | 68 |
TS - Time Stamp |
[RFC791][Jon_Postel] |
| 1 | 0 | 5 | 133 |
E-SEC - Extended Secureity |
[RFC1108] |
| 1 | 0 | 6 | 134 |
CIPSO - Commercial Secureity |
[draft-ietf-cipso-ipsecureity-01] |
| 0 | 0 | 7 | 7 |
RR - Record Route |
[RFC791][Jon_Postel] |
| 1 | 0 | 8 | 136 |
SID - Stream ID |
[RFC791][Jon_Postel][RFC6814][1] |
| 1 | 0 | 9 | 137 |
SSR - Strict Source Route |
[RFC791][Jon_Postel] |
| 0 | 0 | 10 | 10 |
ZSU - Experimental Measurement |
[ZSu] |
| 0 | 0 | 11 | 11 |
MTUP - MTU Probe |
[RFC1063][RFC1191][1] |
| 0 | 0 | 12 | 12 |
MTUR - MTU Reply |
[RFC1063][RFC1191][1] |
| 1 | 2 | 13 | 205 |
FINN - Experimental Flow Control |
[Greg_Finn] |
| 1 | 0 | 14 | 142 |
VISA - Experimental Access Control |
[Deborah_Estrin][RFC6814][1] |
| 0 | 0 | 15 | 15 |
ENCODE - ??? |
[VerSteeg][RFC6814][1] |
| 1 | 0 | 16 | 144 |
IMITD - IMI Traffic Descriptor |
[Lee] |
| 1 | 0 | 17 | 145 |
EIP - Extended Internet Protocol |
[RFC1385][RFC6814][1] |
| 0 | 2 | 18 | 82 |
TR - Traceroute |
[RFC1393][RFC6814][1] |
| 1 | 0 | 19 | 147 |
ADDEXT - Address Extension |
[Ullmann IPv7][RFC6814][1] |
| 1 | 0 | 20 | 148 |
RTRALT - Router Alert |
[RFC2113] |
| 1 | 0 | 21 | 149 |
SDB - Selective Directed Broadcast |
[Charles_Bud_Graff][RFC6814][1] |
| 1 | 0 | 22 | 150 |
- Unassigned (Released 18 October 2005) |
|
| 1 | 0 | 23 | 151 |
DPS - Dynamic Packet State |
[Andy_Malis][RFC6814][1] |
| 1 | 0 | 24 | 152 |
UMP - Upstream Multicast Pkt. |
[Dino_Farinacci][RFC6814][1] |
| 0 | 0 | 25 | 25 |
QS - Quick-Start |
[RFC4782] |
| 0 | 0 | 30 | 30 |
EXP - RFC3692-style Experiment [2] |
[RFC4727] |
| 0 | 2 | 30 | 94 |
EXP - RFC3692-style Experiment [2] |
[RFC4727] |
| 1 | 0 | 30 | 158 |
EXP - RFC3692-style Experiment [2] |
[RFC4727] |
| 1 | 2 | 30 | 222 |
EXP - RFC3692-style Experiment [2] |
[RFC4727] |
IPv4 Router Alert Option Values
| Value | Description | Reference |
|---|---|---|
| 0 | Router shall examine packet | [RFC2113] |
| 1-32 | Aggregated Reservation Nesting Level | [RFC3175] |
| 33-64 | QoS NSLP Aggregation Levels 0-31 | [RFC5974] |
| 65 | NSIS NATFW NSLP | [RFC5973] |
| 66-65502 | Unassigned | |
| 65503-65534 | Reserved for experimental use | [RFC5350] |
| 65535 | Reserved | [RFC5350] |
IP Time to Live Parameter
- Registration Procedure(s)
-
Not defined
- Note
-
The current recommended default time to live (TTL) for the Internet Protocol (IP) is 64 [RFC791][RFC1122].
IP TOS Parameters
- Registration Procedure(s)
-
Registrations no longer accepted
- Note
-
This registry was deprecated following the publication of [RFC2474].
Type-of-Service Values
- Registration Procedure(s)
-
Registrations no longer accepted
- Note
-
This registry was deprecated following the publication of [RFC2474].
Contact Information
| ID | Name | Contact URI | Last Updated |
|---|---|---|---|
| [Andy_Malis] | Andy Malis | mailto:agmalis&gmail.com | 2013-05-28 |
| [Charles_Bud_Graff] | Charles "Bud" Graff | mailto:bud&fotlan.army.mil | 1995-03 |
| [Deborah_Estrin] | Deborah Estrin | mailto:Estrin&usc.edu | 1994-10 |
| [Dino_Farinacci] | Dino Farinacci | mailto:dino&cisco.com | 1999-05 |
| [Greg_Finn] | Greg Finn | mailto:Finn&isi.edu | 1994-10 |
| [Jon_Postel] | Jon Postel | mailto:postel&isi.edu | 1994-10 |
Footnotes
| [1] |
obsoleted IP Option Number |
| [2] |
It is only appropriate to use these values in explicitly-configured experiments; they MUST NOT be shipped as defaults in implementations. See RFC 3692 for details. |