| Internet-Draft | ASPA Notation | May 2023 |
| Bruijnzeels, et al. | Expires 12 November 2023 | [Page] |
This document defines a human readable notation for Validated ASPA Payloads (VAP, see ID-aspa-profile) for use with RPKI tooling based on ABNF (RFC 5234).¶
This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.¶
Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.¶
Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."¶
This Internet-Draft will expire on 12 November 2023.¶
Copyright (c) 2023 IETF Trust and the persons identified as the document authors. All rights reserved.¶
This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License.¶
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.¶
This informational document defines a human readable ASPA notation for Validated ASPA Payloads (VAPs) [I-D.ietf-sidrops-aspa-profile].¶
The main motivations for providing this notations style are: * This can help to create consistency between RPKI Relying Party software output, making it easier for operators to compare results. * This can be used by RPKI Certificate Authorities (CA) command line interfaces and/or configuration. E.g. allowing a CA to provide a listing of intended VAPs which can be easily compared to RP output. * This can be used for documentation.¶
That said, this definition is informational. Implementations can choose to use their own notation styles instead of, or in addition to this.¶
This specification uses ABNF syntax specified in [RFC5234].¶
notation = customer-asid separator providers customer-asid = asn separator = " => " providers = provider-as *(provider-separator provider-as) provider-as = asn / asn-limit-v4 / asn-limit-v6 provider-separator = ", " uint32 = %d0-4294967295 asn = ["AS"] uint32 asn-limit-v4 = asn "(v4)" asn-limit-v6 = asn "(v6)"¶
This field represents the customerASID defined in section 3.2 of [I-D.ietf-sidrops-aspa-profile]¶
This field represents the providers defined in section 3.3 of [I-D.ietf-sidrops-aspa-profile]. Note that the normative constraints which are defined in that section mean that following :¶
This field represents a ProviderAS as defined in section 3.3.1 of [I-D.ietf-sidrops-aspa-profile].¶
A ProviderAS in ASPA consists of a providerASID (section 3.3.1.1) and an optional afiLimit (section 3.3.1.2). In the notation defined here we use a simple "asn" to represent a ProviderAS that has no afiLimit, we use "asn-limit-v4" to represent a ProviderAS with an afiLimit for IPv4, and we use "asn-limit-v4" to represent a ProviderAS with an afiLimit for IPv6.¶
As mentioned earlier: the same "asn" MUST NOT appear more than once in the providers. There is no point in listing the same "asn" with and without an afiLimit, as the entry without an afiLimit already encompassed the other. Similarly, there is no point in listing the same "asn" with an IPv4 and an IPv6 limit, as this can and must be more concisely expressed as a single entry without an afiLimit.¶
AS65000 => AS65001 AS65000 => AS65002(v4) AS65000 => AS65001, AS65002(v4), AS65003(v6) 65000 => 65001 65000 => AS65002(v4) 65000 => 65001, 65002(v4), 65003(v6)¶
This document has no IANA actions.¶
TBD¶