Internet Control Message Protocol (ICMP) Parameters

Unfinished Document - please be awere of this!
This is mosty a copy from IANA so if you don't find it here try this page instead.

ICMP Type Numbers

Registration Procedures

IESG Approval or Standards Action

Reference

[RFC2939]

Note

The Internet Control Message Protocol (ICMP) has many messages that are identified by a "type" field.

 

Type	Name	Reference
0	Echo Reply	[RFC792]
1	Unassigned	[JBP]
2	Unassigned	[JBP]
3	Destination Unreachable	[RFC792]
4	Source Quench (Deprecated)	[RFC792][RFC6633]
5	Redirect	[RFC792]
6	Alternate Host Address	[JBP]
7	Unassigned	[JBP]
8	Echo	[RFC792]
9	Router Advertisement	[RFC1256]
10	Router Solicitation	[RFC1256]
11	Time Exceeded	[RFC792]
12	Parameter Problem	[RFC792]
13	Timestamp	[RFC792]
14	Timestamp Reply	[RFC792]
15	Information Request	[RFC792]
16	Information Reply	[RFC792]
17	Address Mask Request	[RFC950]
18	Address Mask Reply	[RFC950]
19	Reserved (for Security)	[Solo]
20-29	Reserved (for Robustness Experiment)	[ZSu]
30	Traceroute	[RFC1393]
31	Datagram Conversion Error	[RFC1475]
32	Mobile Host Redirect	[David_Johnson]
33	IPv6 Where-Are-You	[Simpson]
34	IPv6 I-Am-Here	[Simpson]
35	Mobile Registration Request	[Simpson]
36	Mobile Registration Reply	[Simpson]
37	Domain Name Request	[RFC1788]
38	Domain Name Reply	[RFC1788]
39	SKIP	[Markson]
40	Photuris	[RFC2521]
41	ICMP messages utilized by experimental mobility protocols such as Seamoby	[RFC4065]
42-255	Reserved	[JBP]

 

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Code Fields

Registration Procedures

IESG Approval or Standards Action

Reference

[RFC2939]

Note

Many of these ICMP types have a "code" field.  Here we list the types again with their assigned code fields.

Type 0 - Echo Reply

Reference

[RFC792]

Codes	Description	Reference
0	No Code

Type 1 - Unassigned

Reference

[JPB]

Registry is empty

Type 2 - Unassigned

Reference

[JPB]

Registry is empty

Type 3 — Destination Unreachable

Reference

[RFC792]

Code	Description	Reference
0	Net Unreachable	[RFC792]
1	Host Unreachable	[RFC792]
2	Protocol Unreachable	[RFC792]
3	Port Unreachable	[RFC792]
4	Fragmentation Needed and Don't Fragment was Set	[RFC792]
5	Source Route Failed	[RFC792]
6	Destination Network Unknown	[RFC1122]
7	Destination Host Unknown	[RFC1122]
8	Source Host Isolated	[RFC1122]
9	Communication with Destination Network is Administratively Prohibited	[RFC1122]
10	Communication with Destination Host is Administratively Prohibited	[RFC1122]
11	Destination Network Unreachable for Type of Service	[RFC1122]
12	Destination Host Unreachable for Type of Service	[RFC1122]
13	Communication Administratively Prohibited	[RFC1812]
14	Host Precedence Violation	[RFC1812]
15	Precedence cutoff in effect	[RFC1812]

Type 4 — Source Quench (Deprecated)

Reference

[RFC792][RFC6633]

Codes	Description	Reference
0	No Code

Type 5 — Redirect

Reference

[RFC792]

Codes	Description	Reference
0	Redirect Datagram for the Network (or subnet)
1	Redirect Datagram for the Host
2	Redirect Datagram for the Type of Service and Network
3	Redirect Datagram for the Type of Service and Host

 Type 6 — Alternate Host Address

Reference

[JBP]

Codes	Description	Reference
0	Alternate Address for Host

Type 7 - Unassigned

Reference

[JPB]

Registry is empty

Type 8 — Echo

Reference

[RFC792]

Codes	Description	Reference
0	No Code

Type 9 — Router Advertisement

Reference

[RFC1256]

Codes	Description	Reference
0	Normal router advertisement	[RFC3344]
16	Does not route common traffic	[RFC3344]

Type 10 — Router Selection

Reference

[RFC1256]

Codes	Description	Reference
0	No Code

Type 11 — Time Exceeded

Reference

[RFC792]

Codes	Description	Reference
0	Time to Live exceeded in Transit
1	Fragment Reassembly Time Exceeded

Type 12 — Parameter Problem

Reference

[RFC792]

Codes	Description	Reference
0	Pointer indicates the error
1	Missing a Required Option	[RFC1108]
2	Bad Length

Type 13 — Timestamp

Reference

[RFC792]

Codes	Description	Reference
0	No Code

Type 14 — Timestamp Reply

Reference

[RFC792]

Codes	Description	Reference
0	No Code

Type 15 — Information Request

Reference

[RFC792]

Codes	Description	Reference
0	No Code

Type 16 — Information Reply

Reference

[RFC792]

Codes	Description	Reference
0	No Code

Type 17 — Address Mask Request

Reference

[RFC950]

Codes	Description	Reference
0	No Code

Type 18 — Address Mask Reply

Reference

[RFC950]

Codes	Description	Reference
0	No Code

Type 19 — Reserved (for Security)

Reference

[Solo]

Registry is empty.