Browse Prior Art Database

Impact of BGP Filtering on Inter-Domain Routing Policies (RFC7789) Disclosure Number: IPCOM000245778D
Original Publication Date: 2016-Apr-01
Included in the Prior Art Database: 2016-Apr-07
Document File: 32 page(s) / 38K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

C. Cardona: AUTHOR [+2]


It is common practice for network operators to propagate a more- specific prefix in the BGP routing system along with the less- specific prefix that they originate. It is also possible for some Autonomous Systems (ASes) to apply different policies to the more specific and the less-specific prefix.

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Internet Engineering Task Force (IETF)                        C. Cardona Request for Comments: 7789                           IMDEA Networks/UC3M Category: Informational                                      P. Francois ISSN: 2070-1721                                               P. Lucente                                                            Cisco Systems                                                               April 2016

         Impact of BGP Filtering on Inter-Domain Routing Policies


   This document describes how unexpected traffic flows can emerge    across an autonomous system as the result of other autonomous systems    filtering or restricting the propagation of more-specific prefixes.    We provide a review of the techniques to detect the occurrence of    this issue and defend against it.

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 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

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    ( 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.

Cardona, et al.               Informational                     [Page 1]
 RFC 7789                 Impact of BGP Filtering              April 2016

 Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2

     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3

   2.  Unexpected Traffic Flows  . . . . . . . . . . ....