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5. IANA Considerations

IANA has made the following changes and additions to its registration of MPLS labels.

  1. Changed the name of the "Multiprotocol Label Switching Architecture (MPLS) Label Values" registry to "Special-Purpose MPLS Label Values".

  2. Changed the allocation policy for the "Special-Purpose MPLS Label Values" registry to Standards Action.

  3. Assigned value 15 from the "Special-Purpose MPLS Label Values" registry, naming it the "Extension Label" and citing this document as the reference.

  4. Created a new registry called the "Extended Special-Purpose MPLS Label Values" registry. The registration procedure is Standards Action, and the ranges for this registry are as shown in Table 1 (using terminology from [RFC5226]). Early allocation following the policy defined in [RFC7120] is allowed only for those values assigned by Standards Action.

RangeAllocation Policy
0 - 15Reserved. Never to be made available for allocation.
16 - 239Unassigned
240 - 255Reserved for Experimental Use
256 - 1048575Reserved. Not to be made available for allocation without a new Standards Track RFC to define an allocation policy.

Table 1