RSVP-TE Signaling Extension for Bandwidth availability
draft-long-ccamp-rsvp-te-bandwidth-availability-00

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Document Type Active Internet-Draft (individual)
Last updated 2013-02-18
Replaced by draft-ietf-ccamp-rsvp-te-bandwidth-availability, rfc8625
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Network Working Group                                           H. Long 
Internet Draft                                                     M.Ye 
Intended status: Standards Track           Huawei Technologies Co., Ltd 
Expires: August 2013                                  February 18, 2013  
 
                                      
           RSVP-TE Signaling Extension for Bandwidth availability 
           draft-long-ccamp-rsvp-te-bandwidth-availability-00.txt 

Abstract 

   Packet switching network usually contains links with variable 
   bandwidth, e.g., copper, radio, etc. The bandwidth of such link is 
   sensitive to external environment. Availability is typically used 
   for describing the link during network planning. This document 
   describes an extension for RSVP-TE signaling for setting up a LSP in 
   a PSN network which contains variable bandwidth link by introducing 
   an optional availability field in RSVP-TE signaling. 

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 August 18, 2013. 

Copyright Notice 

   Copyright (c) 2013 IETF Trust and the persons identified as the 
   document authors. All rights reserved. 

 
 
 
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   This document is subject to BCP 78 and the IETF Trust's Legal 
   Provisions Relating to IETF Documents 
   (http://trustee.ietf.org/license-info) in effect on the date of 
   publication of this document. Please review these documents 
   carefully, as they describe your rights and restrictions with 
   respect to this document. Code Components extracted from this 
   document must include Simplified BSD License text as described in 
   Section 4.e of the Trust Legal Provisions and are provided without 
   warranty as described in the Simplified BSD License. 

Table of Contents 

   1. Introduction ................................................ 2 
   2. Extension to RSVP-TE Signaling............................... 3 
   3. Extension to Routing Protocol................................ 6 
   4. Security Considerations...................................... 8 
   5. IANA Considerations ......................................... 8 
   6. References .................................................. 8 
      6.1. Normative References.................................... 8 
      6.2. Informative References.................................. 9 
   7. Acknowledgments ............................................. 9 
 
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]. 

1. Introduction 

   The RSVP-TE specification [RFC3209] and GMPLS extensions [RFC3473] 
   specify the signaling message including the bandwidth request for 
   setting up a label switching path in a PSN network. 

   In some networks, there may be some links with variable bandwidth. 
   For example, in mobile backhaul network, microwave links are very 
   popular for providing connection of last hops. In case of heavy rain, 
   to maintain the link connectivity, the microwave link will lower the 
   modulation format since demodulating lower modulation format need 
   lower signal-to-noise ratio (SNR). This is called adaptive 
   modulation technology. However, lower modulation format also means 
   lower link bandwidth. Similarly the cooper links may change their 
   link bandwidth due to external interference.  

   The parameter, availability [G.827, F.1703], is often used to 
   describe the link capacity during network planning. A link may 
   provide different bandwidth for different availability requirement. 
 
 
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   To set up a LSP across such kind of links, availability information 
   is required for the nodes to verify bandwidth satisfaction and make 
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