Traffic Steering using BGP Flowspec with SRv6 Policy
draft-jiang-idr-ts-flowspec-srv6-policy-00

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Network Working Group                                               W. J
Internet-Draft                                                    Y. Liu
Intended status: Standards Track                            China Mobile
Expires: January 14, 2021                                          Y. Gu
                                                                  Huawei
                                                           July 13, 2020

          Traffic Steering using BGP Flowspec with SRv6 Policy
               draft-jiang-idr-ts-flowspec-srv6-policy-00

Abstract

   BGP Flow Specification (FlowSpec) [I-D.ietf-idr-rfc5575bis] has been
   proposed to distribute BGP FlowSpec NLRI to FlowSpec clients to
   mitigate (distributed) denial-of-service attacks, and to provide
   traffic filtering in the context of a BGP/MPLS VPN service.
   Recently, traffic steering applications in the context of SRv6 using
   FlowSpec aslo attract attention.  This document introduces the usage
   of BGP FlowSpec to steer packets into an SRv6 Policy.

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 [RFC2119].

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 January 14, 2021.

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Copyright Notice

   Copyright (c) 2020 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
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   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.  Definitions and Acronyms  . . . . . . . . . . . . . . . . . .   3
   3.  Operations  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Application Example . . . . . . . . . . . . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   7.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   5
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   Segment Routing IPv6 (SRv6) is a protocol designed to forward IPv6
   data packets on a network using the source routing model.  SRv6
   enables the ingress to add a segment routing header (SRH) [RFC8754]
   to an IPv6 packet and push an explicit IPv6 address stack into the
   SRH.  After receiving the packet, each transit node updates the IPv6
   destination IP address in the packet and segment list to implement
   hop-by-hop forwarding.

   SRv6 Policy [I-D.ietf-spring-segment-routing-policy] is a tunneling
   technology developed based on SRv6.  An SRv6 Policy is a set of
   candidate paths consisting of one or more segment lists, that is,
   segment ID (SID) lists.  Each SID list identifies an end-to-end path
   from the source to the destination, instructing a device to forward
   traffic through the path rather than the shortest path computed using
   an IGP.  The header of a packet steered into an SRv6 Policy is
   augmented with an ordered list of segments associated with that SRv6

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   Policy, so that other devices on the network can execute the
   instructions encapsulated into the list.