IS-IS Extended Sequence number TLV
draft-ietf-isis-extended-sequence-no-tlv-03

Working Group                                                U. Chunduri
Internet-Draft                                                     W. Lu
Intended status: Standards Track                                 A. Tian
Expires: January 5, 2015                                   Ericsson Inc.
                                                                 N. Shen
                                                     Cisco Systems, Inc.
                                                            July 4, 2014

                   IS-IS Extended Sequence number TLV
              draft-ietf-isis-extended-sequence-no-tlv-03

Abstract

   This document defines Extended Sequence number TLV to protect
   Intermediate System to Intermediate System (IS-IS) PDUs from replay
   attacks.

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   Copyright (c) 2014 IETF Trust and the persons identified as the
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Chunduri, et al.         Expires January 5, 2015                [Page 1]
Internet-Draft     IS-IS Extended Sequence number TLV          July 2014

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
     1.2.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Replay attacks and Impact on IS-IS networks . . . . . . . . .   4
     2.1.  IIHs  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  LSPs  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  SNPs  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Extended Sequence Number TLV  . . . . . . . . . . . . . . . .   4
     3.1.  Sequence Number Wrap  . . . . . . . . . . . . . . . . . .   5
   4.  Mechanism and Packet Encoding . . . . . . . . . . . . . . . .   6
     4.1.  IIHs  . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  SNPs  . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Backward Compatibility and Deployment . . . . . . . . . . . .   6
     5.1.  IIH and SNPs  . . . . . . . . . . . . . . . . . . . . . .   7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   7
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   10. Appendix A  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     10.1.  Appendix A.1 . . . . . . . . . . . . . . . . . . . . . .   8
     10.2.  Appendix A.2 . . . . . . . . . . . . . . . . . . . . . .   8
   11. Appendix B  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     11.1.  Operational/Implementation consideration . . . . . . . .   9
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     12.1.  Normative References . . . . . . . . . . . . . . . . . .   9
     12.2.  Informative References . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   With the rapid development of new data center infrastructures, due to
   its flexibility and scalability attributes, IS-IS has been adopted
   widely in various L2/L3 routing and switching deployment of the data
   centers and for critical business operations.  At the meantime the
   SDN-enabled networks even though put more power to Internet
   applications and also make network management easier, it does raise
   the security requirement of network routing infrastructure to another