BGP-LS extensions for Preferred Path Routing
draft-chunduri-idr-bgp-ls-ppr-ext-00

Document Type Active Internet-Draft (individual)
Last updated 2019-05-17
Stream (None)
Intended RFC status (None)
Formats plain text pdf htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
IDR Working Group                                            U. Chunduri
Internet-Draft                                         P. Pillay-Esnault
Intended status: Standards Track                              Huawei USA
Expires: November 18, 2019                                    M. Nanduri
                                                                  Oracle
                                                            May 17, 2019

              BGP-LS extensions for Preferred Path Routing
                  draft-chunduri-idr-bgp-ls-ppr-ext-00

Abstract

   This document describe extensions to BGP-LS protocol to include
   Preferred Path Routing (PPR) information.  This document also extends
   BGP-LS protocol and define new SAFIs and NLRIs for propagating path
   information from a central entity to a node in the network in the
   south bound direction.

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 RFC2119 [RFC2119],
   RFC8174 [RFC8174] when, and only when they appear in all capitals, as
   shown here.

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 November 18, 2019.

Chunduri, et al.        Expires November 18, 2019               [Page 1]
Internet-DraftBGP-LS extensions for Preferred Path Routing      May 2019

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
     1.1.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  PPR-ID TLVs Supported by a Prefix . . . . . . . . . . . . . .   3
     2.1.  PPR-ID Encoding . . . . . . . . . . . . . . . . . . . . .   4
   3.  Southbound BGP-LS SAFI and NLRIs  . . . . . . . . . . . . . .   5
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  New BGP-LS Attribute  . . . . . . . . . . . . . . . . . .   6
     5.2.  New BGP-LS SAFIs  . . . . . . . . . . . . . . . . . . . .   6
     5.3.  New BGP-LS NLRIs  . . . . . . . . . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Preferred Path Routing (PPR) is a path routing mechanism where
   routing happens on path identifier in the packet as opposed to
   individual segments in the packet as defined in [RFC8402].  PPRs
   allow path routing for any underlying data plane with abstracted path
   identifier to represent the path of the data packet.  Definition and
   usage of PPRs by the link state routing protocols ( IS-IS, OSPFv2 and
   OSPFv3) within IGP topologies are detailed in
   [I-D.chunduri-lsr-isis-preferred-path-routing] and
   [I-D.chunduri-lsr-ospf-preferred-path-routing].

   PPR-Identifier (PPR-ID) TLV allows advertisement of multi-hop Traffic
   Engineered (TE) paths, Fast Re-Route (FRR) or certain chained paths.
   The flooding scope for the IGP extensions for PPRs is an IGP area/

Chunduri, et al.        Expires November 18, 2019               [Page 2]
Internet-DraftBGP-LS extensions for Preferred Path Routing      May 2019

   domain.  Consequently, the contents of a Link State Database (LSDB)
Show full document text