BGP-LS extensions for Segment Routing BGP Egress Peer Engineering
draft-ietf-idr-bgpls-segment-routing-epe-17

Document Type Active Internet-Draft (idr WG)
Last updated 2018-10-19
Replaces draft-previdi-idr-bgpls-segment-routing-epe
Stream IETF
Intended RFC status Proposed Standard
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Revised I-D Needed - Issue raised by WG, Doc Shepherd Follow-up Underway, Other - see Comment Log
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Inter-Domain Routing                                     S. Previdi, Ed.
Internet-Draft                                                Individual
Intended status: Standards Track                           K. Talaulikar
Expires: April 22, 2019                                      C. Filsfils
                                                     Cisco Systems, Inc.
                                                                K. Patel
                                                            Arrcus, Inc.
                                                                  S. Ray
                                                  Individual Contributor
                                                                 J. Dong
                                                     Huawei Technologies
                                                        October 19, 2018

   BGP-LS extensions for Segment Routing BGP Egress Peer Engineering
              draft-ietf-idr-bgpls-segment-routing-epe-17

Abstract

   Segment Routing (SR) leverages source routing.  A node steers a
   packet through a controlled set of instructions, called segments, by
   prepending the packet with an SR header.  A segment can represent any
   instruction, topological or service-based.  SR segments allow
   steering a flow through any topological path and service chain while
   maintaining per-flow state only at the ingress node of the SR domain.

   This document describes an extension to BGP Link State (BGP-LS) for
   advertisement of BGP Peering Segments along with their BGP peering
   node information so that efficient BGP Egress Peer Engineering (EPE)
   policies and strategies can be computed based on Segment Routing.

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

Previdi, et al.          Expires April 22, 2019                 [Page 1]
Internet-Draft    Segment Routing EPE BGP-LS Extensions     October 2018

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
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   This Internet-Draft will expire on April 22, 2019.

Copyright Notice

   Copyright (c) 2018 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Segment Routing Documents . . . . . . . . . . . . . . . . . .   4
   3.  BGP Peering Segments  . . . . . . . . . . . . . . . . . . . .   4
   4.  BGP-LS NLRI for BGP . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  BGP Router ID and Member ASN  . . . . . . . . . . . . . .   6
     4.2.  Mandatory BGP Node Descriptors  . . . . . . . . . . . . .   7
     4.3.  Optional BGP Node Descriptors . . . . . . . . . . . . . .   7
   5.  BGP-LS Attributes for BGP Peering Segments  . . . . . . . . .   8
     5.1.  Peer-Node-SID . . . . . . . . . . . . . . . . . . . . . .  10
     5.2.  Peer-Adj-SID  . . . . . . . . . . . . . . . . . . . . . .  11
     5.3.  Peer-Set-SID  . . . . . . . . . . . . . . . . . . . . . .  12
   6.  Illustration  . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.1.  Reference Diagram . . . . . . . . . . . . . . . . . . . .  13
     6.2.  Peer-Node-SID for Node D  . . . . . . . . . . . . . . . .  15
     6.3.  Peer-Node-SID for Node F  . . . . . . . . . . . . . . . .  15
     6.4.  Peer-Node-SID for Node E  . . . . . . . . . . . . . . . .  15
     6.5.  Peer-Adj-SID for Node E, Link 1 . . . . . . . . . . . . .  16
     6.6.  Peer-Adj-SID for Node E, Link 2 . . . . . . . . . . . . .  16
   7.  Implementation Status . . . . . . . . . . . . . . . . . . . .  16
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  17
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