Route Leak Prevention using Roles in Update and Open messages
draft-ietf-idr-bgp-open-policy-14
Network Working Group A. Azimov
Internet-Draft Qrator Labs & Yandex
Intended status: Standards Track E. Bogomazov
Expires: July 5, 2021 Qrator Labs
R. Bush
Internet Initiative Japan & Arrcus, Inc.
K. Patel
Arrcus
K. Sriram
USA NIST
January 1, 2021
Route Leak Prevention using Roles in Update and Open messages
draft-ietf-idr-bgp-open-policy-14
Abstract
Route leaks are the propagation of BGP prefixes which violate
assumptions of BGP topology relationships; e.g. passing a route
learned from one lateral peer to another lateral peer or a transit
provider, passing a route learned from one transit provider to
another transit provider or a lateral peer. Existing approaches to
leak prevention rely on marking routes by operator configuration,
with no check that the configuration corresponds to that of the eBGP
neighbor, or enforcement that the two eBGP speakers agree on the
relationship. This document enhances BGP OPEN to establish agreement
of the (peer, customer, provider, Route Server, Route Server client)
relationship of two neighboring eBGP speakers to enforce appropriate
configuration on both sides. Propagated routes are then marked with
an Only to Customer (OTC) attribute according to the agreed
relationship, allowing both prevention and detection of route leaks.
Requirements Language
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.
Status of This Memo
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
Azimov, et al. Expires July 5, 2021 [Page 1]
Internet-Draft Route Leak Prevention January 2021
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Internet-Drafts are draft documents valid for a maximum of six months
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This Internet-Draft will expire on July 5, 2021.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Peering Relationships . . . . . . . . . . . . . . . . . . . . 3
3. BGP Role . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. BGP Role Capability . . . . . . . . . . . . . . . . . . . . . 5
5. Role correctness . . . . . . . . . . . . . . . . . . . . . . 5
5.1. Strict mode . . . . . . . . . . . . . . . . . . . . . . . 6
6. BGP Only to Customer (OTC) Attribute . . . . . . . . . . . . 6
7. Enforcement . . . . . . . . . . . . . . . . . . . . . . . . . 7
8. Additional Considerations . . . . . . . . . . . . . . . . . . 7
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
10. Security Considerations . . . . . . . . . . . . . . . . . . . 8
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
11.1. Normative References . . . . . . . . . . . . . . . . . . 9
11.2. Informative References . . . . . . . . . . . . . . . . . 9
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 10
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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