One document matched: draft-ginsberg-isis-sbfd-discriminator-00.xml

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<rfc category="std" docName="draft-ginsberg-isis-sbfd-discriminator-00.txt"
     ipr="pre5378Trust200902">
  <front>
    <title abbrev="isis-sbfd-discriminator">Advertising S-BFD Discriminators
    in IS-IS</title>

    <author fullname="Les Ginsberg" initials="L" surname="Ginsberg">
      <organization>Cisco Systems</organization>

      <address>
        <postal>
          <street>510 McCarthy Blvd.</street>

          <city>Milpitas</city>

          <code>95035</code>

          <region>CA</region>

          <country>USA</country>
        </postal>

        <email>ginsberg@cisco.com</email>
      </address>
    </author>

    <author fullname="Nobo Akiya" initials="N" surname="Akiya">
      <organization>Cisco Systems</organization>

      <address>
        <postal>
          <street/>

          <city/>

          <code/>

          <region/>

          <country/>
        </postal>

        <email>nobo@cisco.com</email>
      </address>
    </author>

    <author fullname="Mach(Guoyi) Chen" initials="M" surname="Chen">
      <organization>Huawei</organization>

      <address>
        <postal>
          <street/>

          <city/>

          <code/>

          <country/>
        </postal>

        <email>mach.chen@huawei.com</email>
      </address>
    </author>

    <date day="08" month="May" year="2014"/>

    <area>Routing Area</area>

    <workgroup>Networking Working Group</workgroup>

    <keyword>Sample</keyword>

    <abstract>
      <t>This document defines a means of advertising one or more S-BFD
      Discriminators using the IS-IS Router Capability TLV.</t>
    </abstract>

    <note title="Requirements Language">
      <t>The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
      "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
      document are to be interpreted as described in RFC 2119 [RFC2119].</t>
    </note>
  </front>

  <middle>
    <section title="Introduction">
      <t>[S-BFD] defines a simplified mechanism to use Bidirectional
      Forwarding Detection (BFD)[RFC5880]. This mechanism depends on network
      nodes knowing the BFD discriminators which each node in the network has
      reserved for this purpose. Use of the Intermediate System to
      Intermediate System (IS-IS)[IS-IS] protocol is one possible means of
      advertising these discriminators.</t>
    </section>

    <section title=" Encoding Format">
      <t>The IS-IS Router CAPABILITY TLV as defined in [RFC4971] will be used
      to advertise S-BFD discriminators. A new sub-TLV is defined as described
      below. S-BFD Discriminators sub-TLVs are formatted as specified in
      [RFC5305].</t>

      <t><figure>
          <artwork><![CDATA[                                               No. of octets
              +-----------------------------+
              | Type (to be assigned by     |     1
              | IANA - suggested value 19)  |
              +-----------------------------+
              | Length (multiple of 4)      |     1
              +-----------------------------+
              | Discriminator Value(s)      |     4/Discriminator
              :                             :
              +-----------------------------+

]]></artwork>
        </figure></t>

      <t>Inclusion of the S-BFD Discriminators sub-TLV in a Router Capability
      TLV is optional. Multiple S-BFD Discriminators sub-TLVs MAY be
      advertised by an IS. When multiple S-BFD discriminators are advertised
      how a given discriminator is mapped to a specific use case is out of
      scope for this document.</t>

      <t>S-BFD discriminator advertisements MAY be flooded within an area or
      throughout the domain using the procedures specified in [RFC4971].</t>
    </section>

    <section anchor="IANA" title="IANA Considerations">
      <t>This document requires the definition of a new sub-TLV in the
      Sub-TLVs for TLV 242 registry. The value written below is a suggested
      value subject to assignment by IANA.</t>

      <figure>
        <artwork><![CDATA[ 
 Value  Description           
 ----  ---------------------  
  19    S-BFD Discriminators
   
]]></artwork>
      </figure>
    </section>

    <section anchor="Security" title="Security Considerations">
      <t>Security concerns for IS-IS are addressed in [IS-IS], [RFC5304], and
      [RFC5310]. Introduction of the S-BFD Discriminators sub-TLV introduces
      no new security risks for IS-IS.</t>

      <t>Advertisement of the S-BFD discriminators does make it possible for
      attackers to initiate S-BFD sessions using the advertised information.
      The vulnerabilities this poses and how to mitigate them are discussed in
      the Security Considerations section of [S-BFD].</t>
    </section>

    <section anchor="Acknowledgements" title="Acknowledgements">
      <t>The authors wish to thank Sam Aldrin, Manav Bhatia, and Carlos
      Pignataro for input essential to defining the needed functionality.</t>
    </section>
  </middle>

  <back>
    <references title="Normative References">
      <?rfc include="reference.RFC.2119"?>

      <?rfc include='reference.RFC.4971'?>

      <?rfc include='reference.RFC.5304'?>

      <?rfc include='reference.RFC.5305'?>

      <?rfc include='reference.RFC.5310'?>

      <?rfc include='reference.RFC.5880'?>

      <reference anchor="IS-IS">
        <front>
          <title>Intermediate system to Intermediate system intra-domain
          routeing information exchange protocol for use in conjunction with
          the protocol for providing the connectionless-mode Network Service
          (ISO 8473), ISO/IEC 10589:2002, Second Edition.</title>

          <author fullname="ISO "International Organization for Standardization""/>

          <date month="Nov" year="2002"/>
        </front>
      </reference>

      <reference anchor="S-BFD">
        <front>
          <title>Seamless Bidirectional Forwarding Detection (S-BFD),
          draft-akiya-bfd-seamless-base-03(work in progress)</title>

          <author fullname="Akiya N., et al,"/>

          <date month="April" year="2014"/>
        </front>
      </reference>
    </references>
  </back>
</rfc>