Packet-Optical Integration in Segment Routing
draft-anand-spring-poi-sr-08

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SPRING Working Group                                      Madhukar Anand
Internet-Draft                                         Ciena Corporation
Intended Status: Standard Track                                         
                                                          Sanjoy Bardhan
                                                    Infinera Corporation

                                                     Ramesh Subrahmaniam
                                                              Individual

                                                           Jeff Tantsura
                                                                  Apstra

                                                     Utpal Mukhopadhyaya
                                                             Equinix Inc

                                                       Clarence Filsfils
                                                     Cisco Systems, Inc.

Expires: January 30, 2020                                  July 29, 2019

             Packet-Optical Integration in Segment Routing 
                      draft-anand-spring-poi-sr-08

Abstract

   This document illustrates a way to integrate a new class of nodes and
   links in segment routing to represent transport/optical networks in
   an opaque way into the segment routing domain.  An instance of this
   class would be optical networks that are typically transport centric
   by having very few devices with the capability to process packets. 
   In the IP centric network, this will help in defining a common
   control protocol for packet optical integration that will include
   optical paths as 'transport segments' or sub-paths as an augmentation
   to packet paths. The transport segment option also defines a general
   mechanism to allow for future extensibility of segment routing into
   non-packet domains.

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

 

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Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Reference Taxonomy . . . . . . . . . . . . . . . . . . . . . .  4
   3. Use case - Packet Optical Integration . . . . . . . . . . . . .  5
   4.  Mechanism overview . . . . . . . . . . . . . . . . . . . . . .  8
   5.  Transport Segments as SR Policy  . . . . . . . . . . . . . . .  9
   6.  PCEP extensions for supporting the transport segment . . . . . 10
   7.  BGP-LS extensions for supporting the transport segment . . . . 11
     7.1 Node Attributes TLV  . . . . . . . . . . . . . . . . . . . . 11
     7.2 SR-Optical-Node-Capability Sub-TLV . . . . . . . . . . . . . 11
     7.3 Prefix Attribute TLVs  . . . . . . . . . . . . . . . . . . . 12
       7.3.1  Transport Segment SID Sub-TLV . . . . . . . . . . . . . 12
 

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   8. Note about Transport Segments and Scalability . . . . . . . . . 13
   9. Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
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