BGP-LS Advertisement of Segment Routing Service Segments
draft-dawra-idr-bgp-ls-sr-service-segments-01
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2019-01-16
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draft-dawra-idr-bgp-sr-service-chaining
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Inter-Domain Routing G. Dawra, Ed.
Internet-Draft LinkedIn
Intended status: Standards Track C. Filsfils
Expires: July 20, 2019 Cisco Systems
D. Bernier
Bell Canada
J. Uttaro
AT&T
B. Decraene
Orange
H. Elmalky
Ericsson
X. Xu
Alibaba
F. Clad
K. Talaulikar
Cisco Systems
January 16, 2019
BGP-LS Advertisement of Segment Routing Service Segments
draft-dawra-idr-bgp-ls-sr-service-segments-01
Abstract
BGP Link-State (BGP-LS) enables distribution of topology information
from the network to a Path Computation Engine (PCE) or any
controller/application in general so it can learn the network
topology. Service functions are deployed as virtualized elements
along with network elements or on servers in data centers. The
advertisement of such attached service capabilities along with the
network nodes that they are attached to or associated with enable
their discovery and for programming of service paths that use these
service functions. Segment Routing (SR) bring in the concept of
segments which can be topological or service instructions. SR
Policies enable setup of paths which are a mix of topological and
service segments.
This document specifies the extensions to BGP-LS for discovery and
advertisement of service segments so as to enable setup of service
programming paths using Segment Routing.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Dawra, et al. Expires July 20, 2019 [Page 1]
Internet-Draft BGP-LS Extensions for SR Service Segments January 2019
Internet-Drafts are working documents of the Internet Engineering
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This Internet-Draft will expire on July 20, 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
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
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
8. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . 9
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 9
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
10.1. Normative References . . . . . . . . . . . . . . . . . . 9
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