draft-ietf-lsvr-bgp-spf-09.txt   draft-ietf-lsvr-bgp-spf-10.txt 
Network Working Group K. Patel Network Working Group K. Patel
Internet-Draft Arrcus, Inc. Internet-Draft Arrcus, Inc.
Intended status: Standards Track A. Lindem Intended status: Standards Track A. Lindem
Expires: November 16, 2020 Cisco Systems Expires: January 27, 2021 Cisco Systems
S. Zandi S. Zandi
LinkedIn LinkedIn
W. Henderickx W. Henderickx
Nokia Nokia
May 15, 2020 July 26, 2020
Shortest Path Routing Extensions for BGP Protocol Shortest Path Routing Extensions for BGP Protocol
draft-ietf-lsvr-bgp-spf-09 draft-ietf-lsvr-bgp-spf-10
Abstract Abstract
Many Massively Scaled Data Centers (MSDCs) have converged on Many Massively Scaled Data Centers (MSDCs) have converged on
simplified layer 3 routing. Furthermore, requirements for simplified layer 3 routing. Furthermore, requirements for
operational simplicity have led many of these MSDCs to converge on operational simplicity have led many of these MSDCs to converge on
BGP as their single routing protocol for both their fabric routing BGP as their single routing protocol for both their fabric routing
and their Data Center Interconnect (DCI) routing. This document and their Data Center Interconnect (DCI) routing. This document
describes a solution which leverages BGP Link-State distribution and describes a solution which leverages BGP Link-State distribution and
the Shortest Path First (SPF) algorithm similar to Internal Gateway the Shortest Path First (SPF) algorithm similar to Internal Gateway
skipping to change at page 1, line 42 skipping to change at page 1, line 42
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/. Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on November 16, 2020. This Internet-Draft will expire on January 27, 2021.
Copyright Notice Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of (https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
skipping to change at page 19, line 22 skipping to change at page 19, line 22
be finite, implementations SHOULD also maintain counters for the be finite, implementations SHOULD also maintain counters for the
total number of SPF computations of each type and the total number of total number of SPF computations of each type and the total number of
SPF triggering events. Additionally, to troubleshoot SPF scheduling SPF triggering events. Additionally, to troubleshoot SPF scheduling
and back-off [RFC8405], the current SPF back-off state, remaining and back-off [RFC8405], the current SPF back-off state, remaining
time-to-learn, remaining holddown, last trigger event time, last SPF time-to-learn, remaining holddown, last trigger event time, last SPF
time, and next SPF time should be available. time, and next SPF time should be available.
9. Acknowledgements 9. Acknowledgements
The authors would like to thank Sue Hares, Jorge Rabadan, Boris The authors would like to thank Sue Hares, Jorge Rabadan, Boris
Hassanov, Dan Frost, Matt Anderson, and Fred Baker for their review Hassanov, Dan Frost, Matt Anderson, Fred Baker, and Lukas Krattiger
and comments. Thanks to Chaitanya Yadlapalli and Pushpasis Sarkar for their review and comments. Thanks to Pushpasis Sarkar for
for discussions on preventing a BGP SPF Router from being used for discussions on preventing a BGP SPF Router from being used for non-
non-local traffic (i.e., transit traffic). local traffic (i.e., transit traffic).
The authors extend special thanks to Eric Rosen for fruitful The authors extend special thanks to Eric Rosen for fruitful
discussions on BGP-LS SPF convergence as compared to IGPs. discussions on BGP-LS SPF convergence as compared to IGPs.
10. Contributors 10. Contributors
In addition to the authors listed on the front page, the following In addition to the authors listed on the front page, the following
co-authors have contributed to the document. co-authors have contributed to the document.
Derek Yeung Derek Yeung
Arrcus, Inc. Arrcus, Inc.
derek@arrcus.com derek@arrcus.com
Gunter Van De Velde Gunter Van De Velde
Nokia Nokia
gunter.van_de_velde@nokia.com gunter.van_de_velde@nokia.com
Abhay Roy Abhay Roy
Cisco Systems Arrcus, Inc.
akr@cisco.com abhay@arrcus.com
Venu Venugopal Venu Venugopal
Cisco Systems Cisco Systems
venuv@cisco.com venuv@cisco.com
Chaitanya Yadlapalli
AT&T
cy098d@att.com
11. References 11. References
11.1. Normative References 11.1. Normative References
[I-D.ietf-idr-bgpls-segment-routing-epe] [I-D.ietf-idr-bgpls-segment-routing-epe]
Previdi, S., Talaulikar, K., Filsfils, C., Patel, K., Ray, Previdi, S., Talaulikar, K., Filsfils, C., Patel, K., Ray,
S., and J. Dong, "BGP-LS extensions for Segment Routing S., and J. Dong, "BGP-LS extensions for Segment Routing
BGP Egress Peer Engineering", draft-ietf-idr-bgpls- BGP Egress Peer Engineering", draft-ietf-idr-bgpls-
segment-routing-epe-19 (work in progress), May 2019. segment-routing-epe-19 (work in progress), May 2019.
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