Performance-Based Path Selection for Explicitly Routed Label Switched Paths (LSPs) Using TE Metric Extensions (RFC7823)
Original Publication Date: 2016-May-01
Included in the Prior Art Database: 2016-Jun-29
Internet Society Requests For Comment (RFCs)
A. Atlas: AUTHOR [+4]
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
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 http://www.rfc-editor.org/info/rfc7823.
al. Informational [Page 1]
RFC 7823 Path Selection with TE Metric Extensions May 2016
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