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6. IANA Considerations

6.1. Procedure for New ICMPV6 Type and Code Value Assignments​

The IPv6 ICMP header defined in this document contains the following fields that carry values assigned from IANA-managed name spaces: Type and Code. Code field values are defined relative to a specific Type value.

Values for the IPv6 ICMP Type fields are allocated using the following procedure:

  1. The IANA should allocate and permanently register new ICMPv6 type codes from IETF RFC publication. This is for all RFC types, including standards track, informational, and experimental status, that originate from the IETF and have been approved by the IESG for publication.

  2. IETF working groups with working group consensus and area director approval can request reclaimable ICMPV6 type code assignments from the IANA. The IANA will tag the values as "reclaimable in future".

    The "reclaimable in the future" tag will be removed when an RFC is published that documents the protocol as defined in 1. This will make the assignment permanent and update the reference on the IANA web pages.

    At the point where the ICMPv6 type values are 85% assigned, the IETF will review the assignments tagged "reclaimable in the future" and inform the IANA which ones should be reclaimed and reassigned.

  3. Requests for new ICMPv6 type value assignments from outside the IETF are only made through the publication of an IETF document, per 1 above. Note also that documents published as "RFC Editor contributions" [RFC-3978] are not considered IETF documents.

The assignment of new Code values for the Type values defined in this document require standards action or IESG approval. The policy for assigning Code values for new IPv6 ICMP Types not defined in this document should be defined in the document defining the new Type values.

6.2. Assignments for This Document​

The following has updated assignments located at:

````http://www.iana.org/assignments/icmpv6-parameters\````

The IANA has reassigned ICMPv6 type 1 "Destination Unreachable" code 2, which was unassigned in [RFC-2463], to:

  • 2 - Beyond scope of source address

The IANA has assigned the following two new codes values for ICMPv6 type 1 "Destination Unreachable":

  • 5 - Source address failed ingress/egress policy
  • 6 - Reject route to destination

The IANA has assigned the following new type values:

  • 100 - Private experimentation
  • 101 - Private experimentation
  • 127 - Reserved for expansion of ICMPv6 error messages
  • 200 - Private experimentation
  • 201 - Private experimentation
  • 255 - Reserved for expansion of ICMPv6 informational messages
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