MPLS Source Label draft-chen-mpls-source-label-02 Mach Chen, Xiaohu - - PowerPoint PPT Presentation

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MPLS Source Label draft-chen-mpls-source-label-02 Mach Chen, Xiaohu - - PowerPoint PPT Presentation

MPLS Source Label draft-chen-mpls-source-label-02 Mach Chen, Xiaohu Xu Zhenbin Li, Luyuan Fang Gregory Mirsky IETF89 MPLS March. 2014 London 1 Problem Statement MPLS forwarding based label stack MPLS label identifies an FEC and


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MPLS Source Label

Mach Chen, Xiaohu Xu Zhenbin Li, Luyuan Fang Gregory Mirsky IETF89 MPLS March. 2014 London

draft-chen-mpls-source-label-02

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Problem Statement

  • MPLS forwarding based label stack
  • MPLS label identifies an FEC and assumes the destination address semantic
  • No source information encoded in the label stack
  • No support for easy flow and source identification
  • LDP based MP2P (RFC5036) and MP2MP (RFC6388) LSP
  • Segment Routing LSP
  • Service LSPs (e.g., L3VPN)
  • Flow/source identification is pre-condition of:
  • Passive performance measurement
  • Traffic matrix collecting and steering
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Solution Overview

  • Source Label Indicator (SLI)
  • A special purpose label
  • Placed immediately before the SL
  • Indicate the next label is SL
  • MPLS Source Label (SL)
  • Designed to identify ingress LSR of an LSP
  • Unique within the scope it used

LSP Label SLI SL … … Label stack

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Updates Since Last Version

  • Add a new co-author (Gregory Mirsky)
  • Uniqueness of Source label
  • Source label MUST be unique within the scope it used (e.g.,

administrative domain)

  • Allocated from a dedicated label space
  • equivalent to context label, SLI is the context
  • Configuration system (e.g., static configuration) is one way to

make sure the uniqueness

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  • Welcome to review and comment.
  • WG adoption?

Next Steps