Applying BGP flowspec rules on a specific interface set

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Document Type Active Internet-Draft (idr WG)
Last updated 2016-06-08
Replaces draft-litkowski-idr-flowspec-interfaceset
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Routing Area Working Group                                  S. Litkowski
Internet-Draft                                                    Orange
Intended status: Standards Track                              A. Simpson
Expires: December 10, 2016                                Alcatel Lucent
                                                                K. Patel
                                                                 J. Haas
                                                        Juniper Networks
                                                            June 8, 2016

        Applying BGP flowspec rules on a specific interface set


   BGP Flow-spec is an extension to BGP that allows for the
   dissemination of traffic flow specification rules.  The primary
   application of this extension is DDoS mitigation where the flowspec
   rules are applied in most cases to all peering routers of the

   This document will present another use case of BGP Flow-spec where
   flow specifications are used to maintain some access control lists at
   network boundary.  BGP Flowspec is a very efficient distributing
   machinery that can help in saving OPEX while deploying/updating ACLs.
   This new application requires flow specification rules to be applied
   only on a specific subset of interfaces and in a specific direction.

   The current specification of BGP Flow-spec ([RFC5575]) introduces the
   notion of flow specification (which describes the matching criterion)
   and traffic filtering actions.  The flow specification is encoded as
   part of the NLRI while the traffic filtering actions are encoded as
   extended communities.  The combination of a flow specification and
   one or more actions is known as a flow specification rule.  [RFC5575]
   does not detail where the flow specification rules need to be

   Besides the flow specification and traffic filtering actions, this
   document introduces the notion of traffic filtering scope in order to
   drive where a particular rule must be applied.  In particular, this
   document introduces the "interface-set" traffic filtering scope that
   could be used in parallel of traffic filtering actions (marking,
   rate-limiting ...).  The purpose of this extension is to inform
   remote routers about groups of interfaces where the rule must be

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   This extension can also be used in a DDoS mitigation context where a
   provider wants to apply the filtering only on specific peers.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   document are to be interpreted as described in [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on December 10, 2016.

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Table of Contents

   1.  Use case  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Specific filtering for DDoS . . . . . . . . . . . . . . .   3
     1.2.  ACL maintenance . . . . . . . . . . . . . . . . . . . . .   4
   2.  Collaborative filtering and managing filter direction . . . .   5
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