Mechanism for Performing Label Switched Path Ping (LSP Ping) over MPLS Tunnels (RFC6424)
Original Publication Date: 2011-Nov-01
Included in the Prior Art Database: 2011-Dec-05
Internet Society Requests For Comment (RFCs)
N. Bahadur: AUTHOR [+3]
This documents describes methods for performing LSP ping (specified in [RFC4379]) traceroute over MPLS tunnels. The techniques in [RFC4379] outline a traceroute mechanism that includes Forwarding Equivalency Class (FEC) validation and Equal Cost Multi-Path (ECMP) path discovery. Those mechanisms are insufficient and do not provide details when the FEC being traced traverses one or more MPLS tunnels and when Label Switched Path (LSP) stitching [RFC5150] is in use. This document deprecates the Downstream Mapping TLV [RFC4379], introducing instead a new TLV that is more extensible and that enables retrieval of detailed information. Using the new TLV format along with the existing definitions of [RFC4379], this document describes procedures by which a traceroute request can correctly traverse MPLS tunnels with proper FEC and label validations.
Internet Engineering Task Force (IETF) N. Bahadur Request for Comments: 6424 K. Kompella Updates: 4379 Juniper Networks, Inc. Category: Standards Track G. Swallow ISSN: 2070-1721 Cisco Systems November 2011
Mechanism for Performing Label Switched Path Ping (LSP Ping) over MPLS Tunnels
This document describes methods for performing LSP ping (specified in RFC 4379) traceroute over MPLS tunnels and for traceroute of stitched MPLS Label Switched Paths (LSPs). The techniques outlined in RFC 4379 are insufficient to perform traceroute Forwarding Equivalency Class (FEC) validation and path discovery for an LSP that goes over other MPLS tunnels or for a stitched LSP. This document deprecates the Downstream Mapping TLV (defined in RFC 4379) in favor of a new TLV that, along with other procedures outlined in this document, can be used to trace such LSPs.
Status of This Memo
This is an Internet Standards Track document.
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). Further information on Internet Standards is available in 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/rfc6424.
al. Standards Track [Page 1]
RFC 6424 LSP Ping over MPLS Tunnels November 2011
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