BGP-LS Advertisement of Segment Routing Service Segments
draft-dawra-idr-bgp-ls-sr-service-segments-04

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Inter-Domain Routing                                       G. Dawra, Ed.
Internet-Draft                                                  LinkedIn
Intended status: Standards Track                             C. Filsfils
Expires: February 15, 2021                            K. Talaulikar, Ed.
                                                                 F. Clad
                                                           Cisco Systems
                                                              D. Bernier
                                                             Bell Canada
                                                               J. Uttaro
                                                                    AT&T
                                                             B. Decraene
                                                                  Orange
                                                              H. Elmalky
                                                                Ericsson
                                                                   X. Xu
                                                                 Alibaba
                                                             J. Guichard
                                                  Futurewei Technologies
                                                                   C. Li
                                                     Huawei Technologies
                                                         August 14, 2020

        BGP-LS Advertisement of Segment Routing Service Segments
             draft-dawra-idr-bgp-ls-sr-service-segments-04

Abstract

   Service functions are deployed as, physical or virtualized elements
   along with network nodes or on servers in data centers.  Segment
   Routing (SR) brings in the concept of segments which can be
   topological or service instructions.  Service segments are SR
   segments that are associated with service functions.  SR Policies are
   used for the setup of paths for steering of traffic through service
   functions using their service segments.

   BGP Link-State (BGP-LS) enables distribution of topology information
   from the network to a controller or an application in general so it
   can learn the network topology.  This document specifies the
   extensions to BGP-LS for the advertisement of service functions along
   their associated service segments.  The BGP-LS advertisement of
   service function information along with the network nodes that they
   are attached to, or associated with, enables controllers compute and
   setup service paths in the network.

Dawra, et al.           Expires February 15, 2021               [Page 1]
Internet-Draft  BGP-LS Extensions for SR Service Segments    August 2020

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   This Internet-Draft will expire on February 15, 2021.

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   Copyright (c) 2020 IETF Trust and the persons identified as the
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  BGP-LS Extensions for Service Chaining  . . . . . . . . . . .   4
   3.  Illustration  . . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Service Type Table  . . . . . . . . . . . . . . . . . . .   7
     4.2.  Segment routing function Identifier(SFI)  . . . . . . . .   8
   5.  Manageability Considerations  . . . . . . . . . . . . . . . .   8
   6.  Operational Considerations  . . . . . . . . . . . . . . . . .   8
     6.1.  Operations  . . . . . . . . . . . . . . . . . . . . . . .   9
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   9