BGP-LS Advertisement of Segment Routing Service Segments
draft-dawra-idr-bgp-ls-sr-service-segments-05
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Active Internet-Draft (individual)
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Authors |
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Gaurav Dawra
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Clarence Filsfils
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Ketan Talaulikar
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Francois Clad
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daniel.bernier@bell.ca
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Jim Uttaro
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Bruno Decraene
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Hani Elmalky
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Xiaohu Xu
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Jim Guichard
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Cheng Li
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Last updated |
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2021-02-15
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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: August 19, 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
February 15, 2021
BGP-LS Advertisement of Segment Routing Service Segments
draft-dawra-idr-bgp-ls-sr-service-segments-05
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 August 19, 2021 [Page 1]
Internet-Draft BGP-LS Extensions for SR Service Segments February 2021
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 August 19, 2021.
Copyright Notice
Copyright (c) 2021 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
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 . . . . . . . . . . . . . . . . . . . . . . . . 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
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