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Performance-Based Path Selection for Explicitly Routed Label Switched Paths (LSPs) Using TE Metric Extensions (RFC7823) Disclosure Number: IPCOM000246707D
Original Publication Date: 2016-May-01
Included in the Prior Art Database: 2016-Jun-29
Document File: 20 page(s) / 23K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Atlas: AUTHOR [+3]


In certain networks, such as financial information networks, network performance information is becoming as critical to data-path selection as other existing metrics. Network performance information can be obtained via either the TE Metric Extensions in OSPF [RFC7471] or IS-IS [RFC7810] or via a management system. As with other TE information flooded via OSPF or IS-IS, the TE metric extensions have a flooding scope limited to the local area or level. This document describes how a path computation function, whether in an ingress LSR or a PCE [RFC4655], can use that information for path selection for explicitly routed LSPs. The selected path may be signaled via RSVP- TE [RFC3209] [RFC3473] or simply used by the ingress with segment

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Internet Engineering Task Force (IETF)                          A. Atlas Request for Comments: 7823                                      J. Drake Category: Informational                                 Juniper Networks ISSN: 2070-1721                                             S. Giacalone                                                                Microsoft                                                               S. Previdi                                                            Cisco Systems                                                                 May 2016

                   Performance-Based Path Selection for Explicitly Routed Label Switched Paths (LSPs) Using TE Metric Extensions


   In certain networks, it is critical to consider network performance    criteria when selecting the path for an explicitly routed RSVP-TE    Label Switched Path (LSP).  Such performance criteria can include    latency, jitter, and loss or other indications such as the    conformance to link performance objectives and non-RSVP TE traffic    load.  This specification describes how a path computation function    may use network performance data, such as is advertised via the OSPF    and IS-IS TE metric extensions (defined outside the scope of this    document) to perform such path selections.

Status of This Memo

   This document is not an Internet Standards Track specification; it is    published for informational purposes.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Not all documents    approved by the IESG are a candidate for any level of Internet    Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Atlas, et al.                 Informational                     [Page 1]
 RFC 7823        Path Selection with TE Metric Extensions        May 2016

 Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publ...