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Applications and Real-Time Area (art) Internet Engineering Task Force YANG-CBOR YANG-CBOR, RFC XXXX (draft-ietf-core-yang-cbor) defines YANG Schema Item iDentifiers (YANG SID), globally unique 63-bit unsigned integers used to identify YANG items. RFC YYYY (draft-ietf-core-sid) defines ways to allocate these SIDs on the basis of IANA registries. The present specification uses these SID allocation mechanisms to allocate 100 000 SIDs for each of the first 1 000 000 holders of IANA-registered Private Enterprise Numbers (PENs). Discussion of this document takes place on the CoRE Working Group mailing list (), which is archived at . Source for this draft and an issue tracker can be found at .

Introduction YANG-CBOR, RFC XXXX (draft-ietf-core-yang-cbor) defines YANG Schema Item iDentifiers (YANG SID), globally unique 63-bit unsigned integers used to identify YANG items. RFC YYYY (draft-ietf-core-sid) defines ways to allocate these SIDs on the basis of IANA registries. The present specification uses these SID allocation mechanisms to allocate 100 000 SIDs for each of the first 1 000 000 holders of IANA-registered Private Enterprise Numbers (PENs). We allocate 100 000 mega-ranges, for the SID numbers 300 000 000 000 to 399 999 999 999. The holder of a PEN ppp ppp then can use the SID numbers 3pp ppp p00 000 to 3pp ppp p99 999 for allocation in a scheme defined by the holder.

Example The Department for Mathematics and Computer Science of holds PEN 30810. This confers control over the SID range 303 081 000 000 up to 303 081 099 999 to this PEN holder.

Discussion This allocation provides an extremely-low-threshold way for PEN holders to get number space for the YANG SIDs used in their YANG modules. It is, however, not always the approach to recommend to a module author: The space uses 64-bit numbers. While this is of relatively little consequence due to the delta-encoding used for SIDs in YANG-CBOR, a few further bytes can be saved by allocating the SIDs in one of the mega-ranges that are specifically allocated by an organization (which, for the first 2000 or so, will lead to 32-bit outer deltas). This space has no infrastructure to discover the YANG module behind a SID. Of course, each PEN holder can provide such infrastructure, but even then the problem remains how to find that infrastructure for a SID. (Search engines may mitigate this somewhat.) On the other hand, relative obscurity may be exactly what a PEN holder wants to achieve by using this mechanism. Relying on the PEN registry might theoretically trigger a land-grab by prospective writers of YANG modules. However, PENs have been around for decades and such a land-grab hasn't occurred for the other allocations implicitly provided by obtaining a PEN.

IANA Considerations This document allocates 100 000 SID mega-ranges as per . The contact for the allocation is: IETF CORE Working Group (core@ietf.org) or IETF Applications and Real-Time Area (art@ietf.org) The allocation policy inside the mega-range is "private". The URL is that of the present specification. The management of the SID blocks of 100 000 SIDs each, 10 such blocks for each mega-range 3nn nnn 000 000, is delegated to the PEN holder for nnn nnx, where x is the sequence number of the SID block in the mega-range (i.e., the PEN holder for nnn nnx controls SID 3nn nnn x00 000 to 3nn nnn x99 999). The technical capacity to ensure the sustained operation of the registry for a period of at least 10 years (as required for registries of class "private") is derived from the capacity of IANA to maintain the PEN number registry.

Trilliant Networks Inc. Google Switzerland GmbH Acklio Universität Bremen TZI Sandelman Software Works Based on the Concise Binary Object Representation (CBOR, RFC 8949), this document defines encoding rules for representing configuration data, state data, parameters and results of Remote Procedure Call (RPC) operations or actions, and notifications, defined using YANG (RFC 7950). Trilliant Networks Inc. Acklio Google Switzerland GmbH Universität Bremen TZI Sandelman Software Works YANG Schema Item iDentifiers (YANG SID) are globally unique 63-bit unsigned integers used to identify YANG items, as a more compact method to identify YANG items that can be used for efficiency and in constrained environments (RFC 7228). This document defines the semantics, the registration, and assignment processes of YANG SIDs for IETF managed YANG modules. To enable the implementation of these processes, this document also defines a file format used to persist and publish assigned YANG SIDs. This RFC provides the common definitions for the structure and identification of management information for TCP/IP-based internets. In particular, together with its companion memos, which describe the initial management information base along with the initial network management protocol, these documents provide a simple, working architecture and system for managing TCP/IP-based internets and in particular, the Internet. This memo specifies a draft standard for the Internet community. TCP/IP implementation in the Internet which are network manageable are expected to adopt and implement this specification.

Acknowledgments This document was inspired by the discussion of the authors of and how to handle feedback.