Flowspec Indirection-id Redirect
draft-ietf-idr-flowspec-path-redirect-09

Document Type Active Internet-Draft (idr WG)
Last updated 2019-08-21 (latest revision 2019-08-19)
Replaces draft-vandevelde-idr-flowspec-path-redirect
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IDR Working Group                                   G. Van de Velde, Ed.
Internet-Draft                                                     Nokia
Intended status: Standards Track                                K. Patel
Expires: February 20, 2020                                        Arrcus
                                                                   Z. Li
                                                     Huawei Technologies
                                                         August 19, 2019

                    Flowspec Indirection-id Redirect
                draft-ietf-idr-flowspec-path-redirect-09

Abstract

   This document defines a new extended community known as "FlowSpec
   Redirect to indirection-id Extended Community".  This extended
   community triggers advanced redirection capabilities to flowspec
   clients.  When activated, this flowspec extended community is used by
   a flowspec client to retrieve the corresponding next-hop and encoding
   information within a localised indirection-id mapping table.

   The functionality detailed in this document allows a network
   controller to decouple the BGP flowspec redirection instruction from
   the operation of the available paths.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [1].

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on February 20, 2020.

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Copyright Notice

   Copyright (c) 2019 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
   (https://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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  indirection-id and indirection-id table . . . . . . . . . . .   3
   3.  Use Case Scenarios  . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Redirection shortest Path tunnel  . . . . . . . . . . . .   3
     3.2.  Redirection to path-engineered tunnels  . . . . . . . . .   4
     3.3.  Redirection to complex dynamically constructed tunnels  .   5
   4.  Redirect to indirection-id Community  . . . . . . . . . . . .   6
   5.  Redirect using localised indirection-id mapping table . . . .   8
   6.  Validation Procedures . . . . . . . . . . . . . . . . . . . .   8
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   9.  Contributor Addresses . . . . . . . . . . . . . . . . . . . .   9
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  11
     11.2.  Informative References . . . . . . . . . . . . . . . . .  11
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  12

1.  Introduction

   Flowspec is an extension to BGP that allows for the dissemination of
   traffic flow specification rules.  This has many possible
   applications but the primary one for many network operators is the
   distribution of traffic filtering actions for DDoS mitigation.  The
   flowspec standard rfc5575bis [3] defines a redirect-to-VRF action for
   policy-based forwarding, but this mechanism is not always sufficient,
   particularly if the redirected traffic needs to be steered onto an
   explicit path.

   Every flowspec policy route is effectively a rule, consisting of two
   parts.  The first part, encoded in the NLRI field, provides

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