BGP Link-State Extensions for Seamless BFD
draft-ietf-idr-bgp-ls-sbfd-extensions-02
Inter-Domain Routing Z. Li
Internet-Draft S. Zhuang
Intended status: Standards Track Huawei
Expires: November 7, 2020 K. Talaulikar
Cisco Systems
S. Aldrin
Google, Inc
J. Tantsura
Apstra
G. Mirsky
ZTE Corp.
May 6, 2020
BGP Link-State Extensions for Seamless BFD
draft-ietf-idr-bgp-ls-sbfd-extensions-02
Abstract
Seamless Bidirectional Forwarding Detection (S-BFD) defines a
simplified mechanism to use Bidirectional Forwarding Detection (BFD)
with large portions of negotiation aspects eliminated, thus providing
benefits such as quick provisioning as well as improved control and
flexibility to network nodes initiating the path monitoring. The
link-state routing protocols (IS-IS and OSPF) have been extended to
advertise the Seamless BFD (S-BFD) Discriminators.
This draft defines extensions to the BGP Link-state address-family to
carry the S-BFD Discriminators information via BGP.
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
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 7, 2020.
Li, et al. Expires November 7, 2020 [Page 1]
Internet-Draft BGP-LS Extensions for S-BFD May 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Problem and Requirement . . . . . . . . . . . . . . . . . . . 3
4. BGP-LS Extensions for S-BFD Discriminator . . . . . . . . . . 4
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6
6. Manageability Considerations . . . . . . . . . . . . . . . . 6
6.1. Operational Considerations . . . . . . . . . . . . . . . 6
6.2. Management Considerations . . . . . . . . . . . . . . . . 6
7. Security Considerations . . . . . . . . . . . . . . . . . . . 6
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
9.1. Normative References . . . . . . . . . . . . . . . . . . 7
9.2. Informative References . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
Seamless Bidirectional Forwarding Detection (S-BFD) [RFC7880] defines
a simplified mechanism to use Bidirectional Forwarding Detection
(BFD) [RFC5880] with large portions of negotiation aspects
eliminated, thus providing benefits such as quick provisioning as
well as improved control and flexibility to network nodes initiating
the path monitoring.
For monitoring of a service path end-to-end via S-BFD, the headend/
initiator node needs to know the S-BFD Discriminator of the
destination/tail-end node of that service. The link-state routing
protocols (IS-IS, OSPF and OSPFv3) have been extended to advertise
the S-BFD Discriminators. With this a initiator node can learn the
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