BGP Extensions for SRv6 SIDs Allocation
draft-chen-idr-bgp-srv6-sid-allocation-01

Document Type Active Internet-Draft (individual)
Last updated 2019-07-07
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                                                H. Chen
Internet-Draft                                                 Futurewei
Intended status: Standards Track                                   Z. Li
Expires: January 8, 2020                                       S. Zhuang
                                                                  Huawei
                                                            July 7, 2019

                BGP Extensions for SRv6 SIDs Allocation
               draft-chen-idr-bgp-srv6-sid-allocation-01

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
   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 8, 2020.

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

Chen, et al.             Expires January 8, 2020                [Page 1]
Internet-Draft              BGP for SRv6 SIDs                  July 2019

   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.  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
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  12
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   In a network with a central controller, the controller has the link
   state information of the network, including traffic engineering
   information.  In addition, the controller allocates and manages the
   resources of the network in general.  It is natural and beneficial
   for the controller to allocate and manage IDs as a kind of network
   resources.

   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
   deploy an extra protocol PCE in the network.  This will increase the
   CapEx and OpEx.

   Yang may be extended to send IDs to their corresponding network
   elements after the IDs are allocated by a controller.  However, Yang
   progress may be slow.  Some people may not like this.

   There may not be these issues when BGP is used to send IDs.  In
   addition, BGP may be used to distribute IDs into their domains easily

Chen, et al.             Expires January 8, 2020                [Page 2]
Internet-Draft              BGP for SRv6 SIDs                  July 2019

   when needed.  It is also fit for the dynamic and static allocation of
Show full document text