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A Link-Type sub-TLV to Convey the Number of Traffic Engineering Label Switched Paths Signalled with Zero Reserved Bandwidth across a Link (RFC5330)

IP.com Disclosure Number: IPCOM000175676D
Original Publication Date: 2008-Oct-01
Included in the Prior Art Database: 2008-Oct-18
Document File: 9 page(s) / 16K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

JP. Vasseur: AUTHOR [+5]

Abstract

Several Link-type sub-Type-Length-Values (sub-TLVs) have been defined for Open Shortest Path First (OSPF) and Intermediate System to Intermediate System (IS-IS) in the context of Multiprotocol Label Switching (MPLS) Traffic Engineering (TE), in order to advertise some link characteristics such as the available bandwidth, traffic engineering metric, administrative group, and so on. By making statistical assumptions about the aggregated traffic carried onto a set of TE Label Switched Paths (LSPs) signalled with zero bandwidth (referred to as "unconstrained TE LSP" in this document), algorithms can be designed to load balance (existing or newly configured) unconstrained TE LSP across a set of equal cost paths. This requires knowledge of the number of unconstrained TE LSPs signalled across a link. This document specifies a new Link-type Traffic Engineering sub-TLV used to advertise the number of unconstrained TE LSPs signalled across a link.

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Network Working Group                                   JP. Vasseur, Ed. Request for Comments: 5330                            Cisco Systems, Inc Category: Standards Track                                      M.  Meyer                                                                       BT                                                                K. Kumaki                                                            KDDI R&D Labs                                                                 A. Bonda                                                           Telecom Italia                                                             October 2008

               A Link-Type sub-TLV to Convey the Number of         Traffic Engineering Label Switched Paths Signalled with                  Zero Reserved Bandwidth across a Link

Status of This Memo

   This document specifies an Internet standards track protocol for the    Internet community, and requests discussion and suggestions for    improvements.  Please refer to the current edition of the "Internet    Official Protocol Standards" (STD 1) for the standardization state    and status of this protocol.  Distribution of this memo is unlimited.

Abstract

   Several Link-type sub-Type-Length-Values (sub-TLVs) have been defined

   for Open Shortest Path First (OSPF) and Intermediate System to

   Intermediate System (IS-IS) in the context of Multiprotocol Label

   Switching (MPLS) Traffic Engineering (TE), in order to advertise some

   link characteristics such as the available bandwidth, traffic

   engineering metric, administrative group, and so on.  By making

   statistical assumptions about the aggregated traffic carried onto a

   set of TE Label Switched Paths (LSPs) signalled with zero bandwidth

   (referred to as "unconstrained TE LSP" in this document), algorithms

   can be designed to load balance (existing or newly configured)

   unconstrained TE LSP across a set of equal cost paths.  This requires

   knowledge of the number of unconstrained TE LSPs signalled across a

   link.  This document specifies a new Link-type Traffic Engineering

   sub-TLV used to advertise the number of unconstrained TE LSPs

   signalled across a link.

Vasseur, et al.             Standards Track                     [Page 1]
 RFC 5330            Sub-TLV for Unconstrained TE LS...