Route Leak Prevention using Roles in Update and Open messages
draft-ietf-idr-bgp-open-policy-07
Network Working Group A. Azimov
Internet-Draft E. Bogomazov
Intended status: Standards Track Qrator Labs
Expires: July 12, 2020 R. Bush
Internet Initiative Japan & Arrcus
K. Patel
Arrcus, Inc.
K. Sriram
US NIST
January 9, 2020
Route Leak Prevention using Roles in Update and Open messages
draft-ietf-idr-bgp-open-policy-07
Abstract
Route leaks are the propagation of BGP prefixes which violate
assumptions of BGP topology relationships; e.g. passing a route
learned from one peer to another peer or to a transit provider,
passing a route learned from one transit provider to another transit
provider or to a peer. Today, approaches to leak prevention rely on
marking routes by operator configuration, with no check that the
configuration corresponds to that of the BGP neighbor, or enforcement
that the two BGP 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 BGP speakers to enforce appropriate configuration on both
sides. Propagated routes are then marked with an 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 12, 2020 [Page 1]
Internet-Draft Route Leak Prevention January 2020
working documents as Internet-Drafts. The list of current Internet-
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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 12, 2020.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Peering Relationships . . . . . . . . . . . . . . . . . . . . 3
3. BGP Role . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. BGP Role Capability . . . . . . . . . . . . . . . . . . . . . 4
5. Role correctness . . . . . . . . . . . . . . . . . . . . . . 5
5.1. Strict mode . . . . . . . . . . . . . . . . . . . . . . . 6
6. BGP Only to Customer (OTC) Attribute . . . . . . . . . . . . 6
7. Enforcement . . . . . . . . . . . . . . . . . . . . . . . . . 6
8. Additional Considerations . . . . . . . . . . . . . . . . . . 7
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
10. Security Considerations . . . . . . . . . . . . . . . . . . . 8
11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 8
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
12.1. Normative References . . . . . . . . . . . . . . . . . . 8
12.2. Informative References . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 9
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