Internet Protocol Version 4 (IPv4) Parameters
2018-05-03
IP Option Numbers
Not defined
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.
0
0
0
0
EOOL - End of Options List
0
0
1
1
NOP - No Operation
1
0
2
130
SEC - Security
1
0
3
131
LSR - Loose Source Route
0
2
4
68
TS - Time Stamp
1
0
5
133
E-SEC - Extended Security
1
0
6
134
CIPSO - Commercial Security
0
0
7
7
RR - Record Route
1
0
8
136
SID - Stream ID
1
0
9
137
SSR - Strict Source Route
0
0
10
10
ZSU - Experimental Measurement
ZSu
0
0
11
11
MTUP - MTU Probe
0
0
12
12
MTUR - MTU Reply
1
2
13
205
FINN - Experimental Flow Control
1
0
14
142
VISA - Experimental Access Control
0
0
15
15
ENCODE - ???
VerSteeg
1
0
16
144
IMITD - IMI Traffic Descriptor
Lee
1
0
17
145
EIP - Extended Internet Protocol
0
2
18
82
TR - Traceroute
1
0
19
147
ADDEXT - Address Extension
Ullmann IPv7
1
0
20
148
RTRALT - Router Alert
1
0
21
149
SDB - Selective Directed Broadcast
1
0
22
150
- Unassigned (Released 18 October 2005)
1
0
23
151
DPS - Dynamic Packet State
1
0
24
152
UMP - Upstream Multicast Pkt.
0
0
25
25
QS - Quick-Start
0
0
30
30
EXP - RFC3692-style Experiment
0
2
30
94
EXP - RFC3692-style Experiment
1
0
30
158
EXP - RFC3692-style Experiment
1
2
30
222
EXP - RFC3692-style Experiment
obsoleted IP Option Number
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.
IPv4 Router Alert Option Values
IETF Review
0
Router shall examine packet
1-32
Aggregated Reservation Nesting Level
33-64
QoS NSLP Aggregation Levels 0-31
65
NSIS NATFW NSLP
66-65502
Unassigned
65503-65534
Reserved for experimental use
65535
Reserved
IP Time to Live Parameter
Not defined
The current recommended default time to live (TTL) for the Internet
Protocol (IP) is 64 .
IP TOS Parameters
Registrations no longer accepted
This registry was deprecated following the publication of .
Type-of-Service Values
Registrations no longer accepted
This registry was deprecated following the publication of .
Andy Malis
mailto:agmalis&gmail.com
2013-05-28
Charles "Bud" Graff
mailto:bud&fotlan.army.mil
1995-03
Deborah Estrin
mailto:Estrin&usc.edu
1994-10
Dino Farinacci
mailto:dino&cisco.com
1999-05
Greg Finn
mailto:Finn&isi.edu
1994-10
Jon Postel
mailto:postel&isi.edu
1994-10