13. IANA Considerations

This document updates IPv6 Neighbor Discovery and related 6LoWPAN/RPL specifications to allow a node to register an IPv6 prefix with neighbor routers. Key protocol details are preserved below from the RFC text.

13.  IANA Considerations

   IANA has made changes under the "Internet Control Message Protocol
   version 6 (ICMPv6) Parameters" [IANA.ICMP] and the "Routing Protocol
   for Low Power and Lossy Networks (RPL)" [IANA.RPL] registry groups,
   as follows.

13.1.  Updated P-Field Registry

   This specification updates the P-Field introduced in [RFC9685] to
   assign the value of 3, which is the only remaining unassigned value
   for the 2-bit field.  To that effect, IANA has updated the "P-Field
   Values" registry in the "Internet Control Message Protocol version 6
   (ICMPv6) Parameters" registry group as indicated in Table 2:

         +=======+===================================+===========+
         | Value | Meaning                           | Reference |
         +=======+===================================+===========+
         | 3     | Registration for a Unicast Prefix | RFC 9926  |
         +-------+-----------------------------------+-----------+

                         Table 2: New P-Field Value

13.2.  New 6LoWPAN Capability Bit

   IANA has made an addition to the "6LoWPAN Capability Bits"
   [IANA.ICMP.6CIO] registry in the "Internet Control Message Protocol
   version 6 (ICMPv6) Parameters" registry group as indicated in
   Table 3:

   IANA has fixed the description of bit 9 (the "A" flag defined in
   [RFC8928]).  It is not called "1" but "A".

     +=====+=============================================+===========+
     | Bit | Description                                 | Reference |
     +=====+=============================================+===========+
     | 9   | AP-ND Enabled (A bit)                       | [RFC8928] |
     +-----+---------------------------------------------+-----------+
     | 16  | Registration for prefixes supported (F bit) | RFC 9926  |
     +-----+---------------------------------------------+-----------+

                    Table 3: New 6LoWPAN Capability Bit