BGP Extensions for IDs Allocation
draft-wu-idr-bgp-segment-allocation-ext-04

Document Type Active Internet-Draft (candidate for idr WG)
Last updated 2019-10-30
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IDR Working Group                                                H. Chen
Internet-Draft                                                 Futurewei
Intended status: Standards Track                                   Z. Li
Expires: May 2, 2020                                              Huawei
                                                                   Z. Li
                                                            China Mobile
                                                                  Y. Fan
                                                            Casa Systems
                                                                  M. Toy
                                                                 Verizon
                                                                  L. Liu
                                                                 Fujitsu
                                                        October 30, 2019

                   BGP Extensions for IDs Allocation
               draft-wu-idr-bgp-segment-allocation-ext-04

Abstract

   This document describes extensions to the BGP for IDs allocation.
   The IDs are SIDs for segment routing (SR), including SR for IPv6
   (SRv6).  They are distributed to their domains if needed.

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
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   This Internet-Draft will expire on May 2, 2020.

Chen, et al.               Expires May 2, 2020                  [Page 1]
Internet-Draft           BGP for IDs Allocation             October 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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Protocol Extensions . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Node SID NLRI TLV . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Link SID NLRI TLV . . . . . . . . . . . . . . . . . . . .   6
     3.3.  Prefix SID NLRI TLV . . . . . . . . . . . . . . . . . . .  10
     3.4.  Capability Negotiation  . . . . . . . . . . . . . . . . .  11
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  13
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   In a network with a central controller, the controller has the link
   state information of the network, including the resource such as
   traffic enginerring and SIDs information.  It is valuable for the
   controller to allocate and manage the resources including SIDs of the
   network in a centralized way, especially for the SIDs representing
   network resources [I-D.ietf-teas-enhanced-vpn].

   When BGP as a controller allocates an ID, it is natural and
   beneficial to extend BGP to send it to its corresponding network
   elements.

   PCE may be extended to send IDs to their corresponding network
   elements after the IDs are allocated by a controller.  However, when
   BGP is already deployed in a network, using PCE for IDs will need to
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