Resource Public Key Infrastructure (RPKI) Origin Validation for BGP Export
RFC 8893
| Document | Type |
RFC - Proposed Standard
(September 2020; No errata)
Updates RFC 6811
|
|
|---|---|---|---|
| Authors | Randy Bush , Rüdiger Volk , Jakob Heitz | ||
| Last updated | 2020-09-25 | ||
| Replaces | draft-ymbk-sidrops-ov-egress | ||
| Stream | IETF | ||
| Formats | plain text html xml pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Keyur Patel | ||
| Shepherd write-up | Show (last changed 2020-03-01) | ||
| IESG | IESG state | RFC 8893 (Proposed Standard) | |
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Warren Kumari | ||
| Send notices to | sidrops-chairs@ietf.org, keyur@arrcus.com, warren@kumari.net, nathalie@ripe.net | ||
| IANA | IANA review state | IANA OK - No Actions Needed | |
| IANA action state | No IANA Actions | ||
Internet Engineering Task Force (IETF) R. Bush
Request for Comments: 8893 Internet Initiative Japan & Arrcus
Updates: 6811 R. Volk
Category: Standards Track
ISSN: 2070-1721 J. Heitz
Cisco
September 2020
Resource Public Key Infrastructure (RPKI) Origin Validation for BGP
Export
Abstract
A BGP speaker may perform Resource Public Key Infrastructure (RPKI)
origin validation not only on routes received from BGP neighbors and
routes that are redistributed from other routing protocols, but also
on routes it sends to BGP neighbors. For egress policy, it is
important that the classification use the 'effective origin AS' of
the processed route, which may specifically be altered by the
commonly available knobs, such as removing private ASes,
confederation handling, and other modifications of the origin AS.
This document updates RFC 6811.
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 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8893.
Copyright Notice
Copyright (c) 2020 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 Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction
2. Suggested Reading
3. Egress Processing
4. Operational Considerations
5. Security Considerations
6. IANA Considerations
7. References
7.1. Normative References
7.2. Informative References
Acknowledgments
Authors' Addresses
1. Introduction
This document does not change the protocol or semantics of [RFC6811],
BGP prefix origin validation. It highlights an important use case of
origin validation in external BGP (eBGP) egress policies, explaining
specifics of correct implementation in this context.
The term 'effective origin AS' as used in this document refers to the
Route Origin Autonomous System Number (ASN) [RFC6811] of the UPDATE
to be sent to neighboring BGP speakers.
The effective origin AS of a BGP UPDATE is decided by configuration
and outbound policy of the BGP speaker. A validating BGP speaker
MUST apply Route Origin Validation policy semantics (see Section 2 of
[RFC6811] and Section 4 of [RFC8481]) after applying any egress
configuration and policy.
This effective origin AS of the announcement might be affected by
removal of private ASes, confederation [RFC5065], migration
[RFC7705], etc. Any AS_PATH modifications resulting in effective
origin AS change MUST be taken into account.
This document updates [RFC6811] by clarifying that implementations
must use the effective origin AS to determine the Origin Validation
state when applying egress policy.
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.
2. Suggested Reading
It is assumed that the reader understands BGP [RFC4271], the RPKI
[RFC6480], Route Origin Authorizations (ROAs) [RFC6482], RPKI-based
Prefix Validation [RFC6811], and Origin Validation Clarifications
[RFC8481].
3. Egress Processing
BGP implementations supporting RPKI-based origin validation MUST
provide the same policy configuration primitives for decisions based
on the validation state available for use in ingress, redistribution,
and egress policies. When applied to egress policy, validation state
MUST be determined using the effective origin AS of the route as it
will (or would) be announced to the peer. The effective origin AS
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