IS-IS Flooding Parameters advertisement
draft-decraene-lsr-isis-flooding-speed-05

Document Type Active Internet-Draft (individual)
Authors Bruno Decraene  , Chris Bowers  , Jayesh  , Tony Li  , Gunter Van de Velde 
Last updated 2020-10-29
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Network Working Group                                        B. Decraene
Internet-Draft                                                    Orange
Intended status: Standards Track                               C. Bowers
Expires: May 2, 2021                                           Jayesh. J
                                                  Juniper Networks, Inc.
                                                                   T. Li
                                                         Arista Networks
                                                         G. Van de Velde
                                                                   Nokia
                                                        October 29, 2020

                IS-IS Flooding Parameters advertisement
               draft-decraene-lsr-isis-flooding-speed-05

Abstract

   This document proposes a mechanism to adjust IS-IS flooding speed
   between two adjacent routers by adjusting the sender flooding speed
   to the capability of the receiver.  This helps improving the flooding
   throughput, reducing LSPs losses and retransmissions due to receiver
   overload, and avoiding manual tuning of flooding parameters by the
   network operator.  This document defines a new TLV for SNP and/or
   Hello messages.  This TLV may carry a set of parameters indicating
   the performance capacity to receive LSPs.

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
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   This Internet-Draft will expire on May 2, 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Decraene, et al.           Expires May 2, 2021                  [Page 1]
Internet-Draft   IS-IS Flooding Parameters advertisement    October 2020

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Flooding Parameters TLV . . . . . . . . . . . . . . . . . . .   4
     3.1.  InterfaceLSPReceiveWindow sub-TLV . . . . . . . . . . . .   5
     3.2.  minimumInterfaceLSPTransmissionInterval sub-TLV . . . . .   5
     3.3.  minimumLSPTransmissionInterval sub-TLV  . . . . . . . . .   5
   4.  Flow control  . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  Operation on a point to point interface . . . . . . . . .   6
     4.2.  Faster acknowledgments of LSPs  . . . . . . . . . . . . .   6
     4.3.  Operation on a LAN interface  . . . . . . . . . . . . . .   7
   5.  Congestion control  . . . . . . . . . . . . . . . . . . . . .   8
   6.  Faster loss detection and recovery  . . . . . . . . . . . . .   9
   7.  Interaction with other LSP rate limiting mechanisms . . . . .  10
   8.  Determining values to be advertised in the Flooding
       Parameters TLV  . . . . . . . . . . . . . . . . . . . . . . .  10
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  12
   11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  13
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  13
     12.2.  Informative References . . . . . . . . . . . . . . . . .  14
   Appendix A.  Changes / Author Notes . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   IGP flooding is paramount for Link State IGP as routing computations
   assume that the Link State DataBases (LSDBs) are always in sync
   across all nodes in the flooding domain.

   Slow flooding directly translates to delayed network reaction to
   failure and LSDB inconsistencies across nodes.  The former increases
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