Internet Exchange BGP Route Server Operations
RFC 7948
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Type |
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RFC - Informational
(September 2016; No errata)
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Last updated |
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2016-09-07
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Stream |
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IETF
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plain text
pdf
html
bibtex
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Peter Schoenmaker
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Shepherd write-up |
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Show
(last changed 2014-08-26)
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| IESG |
IESG state |
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RFC 7948 (Informational)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Joel Jaeggli
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Send notices to |
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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No IC
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Internet Engineering Task Force (IETF) N. Hilliard
Request for Comments: 7948 INEX
Category: Informational E. Jasinska
ISSN: 2070-1721 BigWave IT
R. Raszuk
Bloomberg LP
N. Bakker
Akamai Technologies B.V.
September 2016
Internet Exchange BGP Route Server Operations
Abstract
The popularity of Internet Exchange Points (IXPs) brings new
challenges to interconnecting networks. While bilateral External BGP
(EBGP) sessions between exchange participants were historically the
most common means of exchanging reachability information over an IXP,
the overhead associated with this interconnection method causes
serious operational and administrative scaling problems for IXP
participants.
Multilateral interconnection using Internet route servers can
dramatically reduce the administrative and operational overhead
associated with connecting to IXPs; in some cases, route servers are
used by IXP participants as their preferred means of exchanging
routing information.
This document describes operational considerations for multilateral
interconnections at IXPs.
Status of This Memo
This document is not an Internet Standards Track specification; it is
published for informational purposes.
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). Not all documents
approved by the IESG are a candidate for any level of Internet
Standard; see 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
http://www.rfc-editor.org/info/rfc7948.
Hilliard, et al. Informational [Page 1]
RFC 7948 IXP BGP Route Server Operations September 2016
Copyright Notice
Copyright (c) 2016 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
(http://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 . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Notational Conventions . . . . . . . . . . . . . . . . . 3
2. Bilateral BGP Sessions . . . . . . . . . . . . . . . . . . . 3
3. Multilateral Interconnection . . . . . . . . . . . . . . . . 4
4. Operational Considerations for Route Server Installations . . 6
4.1. Path Hiding . . . . . . . . . . . . . . . . . . . . . . . 6
4.2. Route Server Scaling . . . . . . . . . . . . . . . . . . 6
4.2.1. Tackling Scaling Issues . . . . . . . . . . . . . . . 7
4.2.1.1. View Merging and Decomposition . . . . . . . . . 7
4.2.1.2. Destination Splitting . . . . . . . . . . . . . . 8
4.2.1.3. NEXT_HOP Resolution . . . . . . . . . . . . . . . 8
4.3. Prefix Leakage Mitigation . . . . . . . . . . . . . . . . 8
4.4. Route Server Redundancy . . . . . . . . . . . . . . . . . 9
4.5. AS_PATH Consistency Check . . . . . . . . . . . . . . . . 9
4.6. Export Routing Policies . . . . . . . . . . . . . . . . . 10
4.6.1. BGP Communities . . . . . . . . . . . . . . . . . . . 10
4.6.2. Internet Routing Registries . . . . . . . . . . . . . 10
4.6.3. Client-Accessible Databases . . . . . . . . . . . . . 10
4.7. Layer 2 Reachability Problems . . . . . . . . . . . . . . 11
4.8. BGP NEXT_HOP Hijacking . . . . . . . . . . . . . . . . . 11
4.9. BGP Operations and Security . . . . . . . . . . . . . . . 13
5. Security Considerations . . . . . . . . . . . . . . . . . . . 13
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1. Normative References . . . . . . . . . . . . . . . . . . 13
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