Skip to main content

9. IANA Considerations

As specified in this document, the MP_REACH_NLRI and MP_UNREACH_NLRI attributes contain the Subsequence Address Family Identifier (SAFI) field. The SAFI name space is defined in this document. The IANA registered and maintains values for the SAFI namespace as follows:

  • SAFI values 1 and 2 are assigned in this document.
  • SAFI value 3 is reserved. It was assigned by RFC 2858 for a use that was never fully implemented, so it is deprecated by this document.
  • SAFI values 5 through 63 are to be assigned by IANA using either the Standards Action process, defined in [RFC2434], or the Early IANA Allocation process, defined in [RFC4020].
  • SAFI values 67 through 127 are to be assigned by IANA, using the "First Come First Served" policy, defined in RFC 2434.
  • SAFI values 0 and 255 are reserved.
  • SAFI values 128 through 240 are part of the previous "private use" range. At the time of approval of this document, the unused values were provided to IANA by the Routing Area Director. These unused values, namely, 130, 131, 135 through 139, and 141 through 240, are considered reserved in order to avoid conflicts.
  • SAFI values 241 through 254 are for "private use", and values in this range are not to be assigned by IANA.
Last updated on