Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Path Diversity using Exclude Route
draft-ietf-teas-lsp-diversity-07

Document Type Active Internet-Draft (teas WG)
Last updated 2017-04-28 (latest revision 2017-03-27)
Replaces draft-ietf-ccamp-lsp-diversity
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Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication (wg milestone: Jul 2015 - Submit XRO based LSP... )
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TEAS Working Group                                    Zafar Ali, Ed. 
   Internet Draft                                   George Swallow, Ed. 
   Intended status: Standard Track                        Cisco Systems 
   Updates RFC4874                                        F. Zhang, Ed. 
   Expires: September 28, 2017                                   Huawei 
                                                         D. Beller, Ed. 
                                                                  Nokia 
                                                         March 27, 2017 
    
      Resource ReserVation Protocol-Traffic Engineering (RSVP-TE) Path 
                       Diversity using Exclude Route 

                    draft-ietf-teas-lsp-diversity-07.txt 

   Status of this Memo 

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   Ali, Swallow, Zhang, Beller, et al. Expires September 2017     [Page 1] 

   Internet Draft      draft-ietf-teas-lsp-diversity-07.txt 

   Abstract 

   Resource ReserVation Protocol-Traffic Engineering provides support 
   for the communication of exclusion information during labeled switch 
   path setup. This document specifies three new route exclusion types.  
   The new types include exclusions based on LSP, PCE, and network 
   assigned identifiers. 
    
   Conventions used in this document 

   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]. 

   Table of Contents 

   1. Introduction..................................................2 
      1.1. Client-Initiated Identifier..............................5 
      1.2. PCE-allocated Identifier.................................6 
      1.3. Network-Assigned Identifier..............................7 
   2. RSVP-TE signaling extensions..................................9 
      2.1. Diversity XRO Subobject..................................9 
      2.2. Diversity EXRS Subobject................................15 
      2.3. Processing rules for the Diversity XRO and EXRS
           subobjects..............................................16 
   3. Security Considerations......................................20 
   4. IANA Considerations..........................................20 
      4.1. New XRO subobject types.................................20 
      4.2. New EXRS subobject types................................21 
      4.3. New RSVP error sub-codes................................21 
   5. Acknowledgements.............................................22 
   6. References...................................................22 
      6.1. Normative References....................................22 
      6.2. Informative References..................................23 
    

   1. Introduction 

      Path diversity for multiple connections is a well-known Service 
      Provider requirement. Diversity constraints ensure that Label-
      Switched Paths (LSPs) can be established without sharing network 
      resources, thus greatly reducing the probability of simultaneous 
      connection failures. 

      The source node can compute diverse paths for LSPs when it has 
      full knowledge of the network topology and is permitted to signal 
      an Explicit Route Object. However, there are scenarios where 
    
    
                           Expires September 2017              [Page 2] 
       

   Internet Draft      draft-ietf-teas-lsp-diversity-07.txt 
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