Internet Engineering Task Force (IETF) A. Retana Request for Comments: 6969 Cisco Systems, Inc. Updates: 5838 D. Cheng Category: Standards Track Huawei Technologies ISSN: 2070-1721 July 2013
OSPFv3 Instance ID Registry Update
Abstract
This document modifies the "Unassigned" number space in the IANA "OSPFv3 Instance ID Address Family Values" registry by dividing it in two halves -- one half Unassigned but managed via Standards Action, and the other Reserved for Private Use. It updates RFC 5838.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6969.
Copyright Notice
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Retana & Cheng Standards Track [Page 1]
RFC 6969 OSPFv3 Instance ID Registry Update July 2013
[RFC5838] defined the "OSPFv3 Instance ID Address Family Values" registry for the purpose of mapping OSPFv3 Instance IDs to different address families. The following table lists the value ranges that were allocated for [RFC5838] and Unassigned.
+---------+---------------------------------------------+-----------+ | Value | Description | Reference | +---------+---------------------------------------------+-----------+ | 0 | IPv6 unicast AF | [RFC5838] | | 1 - 31 | Base IPv6 Unicast AF dependent on local | [RFC5838] | | | policy | | | 32 | Base IPv6 Multicast | [RFC5838] | | 33-63 | IPv6 Multicast AFs dependent on local | [RFC5838] | | | policy | | | 64 | Base IPv4 Unicast AF | [RFC5838] | | 65-95 | IPv4 Unicast AFs dependent on local policy | [RFC5838] | | 96 | Base IPv4 Multicast | [RFC5838] | | 97-127 | IPv4 Multicast AFs dependent on local | [RFC5838] | | | policy | | | 128-255 | Unassigned | [RFC5838] | +---------+---------------------------------------------+-----------+
In some networks, additional OSPFv3 instances may be required to operationally identify specific applications. This need requires a pool of Instance IDs that the operator may locally assign for that purpose.
For example, [OSPF-EMBED] describes an application in which IPv4- embedded IPv6 addresses [RFC6052] are used to transport IPv4 packets over an IPv6 network. While the IPv4-embedded IPv6 addresses do in fact represent IPv6 destinations, it would be operationally beneficial to be able to easily identify the specific application by having a separate space to do so. This benefit is enabled by the allocation of a range of Private Use Instance IDs.
Retana & Cheng Standards Track [Page 2]
RFC 6969 OSPFv3 Instance ID Registry Update July 2013
This document modifies the IANA "OSPFv3 Instance ID Address Family Values" registry by designating a range as Reserved for Private Use. For the remaining unassigned values, the registration procedure is Standards Action.
2. OSPFv3 Instance ID Address Family Values Registry Update
The IANA "OSPFv3 Instance ID Address Family Values" registry has been updated so that Instance IDs from 192-255 are Reserved for Private Use [RFC5226]. For the remaining unassigned values (128-191), the registration procedure is Standards Action. The registry now shows:
+--------------------------+---------------+-----------------------+ | Value | Description | Reference | +--------------------------+---------------+-----------------------+ | 128-191 | Unassigned | 192-255 | | Reserved for Private Use | this document | Private Use [RFC5226] | +--------------------------+---------------+-----------------------+
This document requests the modification of the "OSPFv3 Instance ID Address Family Values" registry as described in Section 2. The reference to [RFC5838] has been removed from the registry for the modified ranges.