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MPLS-TP%20OAM%20Analysis

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MPLS-TP OAM Analysis. Nurit Sprecher / Nokia Siemens Networks. Tom Nadeau / BT ... Define a VPCV (Virtual Path Connectivity Verification) mechanism for LSP and ... – PowerPoint PPT presentation

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Title: MPLS-TP%20OAM%20Analysis


1
MPLS-TP OAM Analysis
  • Nurit Sprecher / Nokia Siemens Networks
  • Tom Nadeau / BT
  • Huub van Helvoort / Huawei
  • Yaacov Weingarten / Nokia Siemens Networks

2
Purpose of the Document
  • IETF existing OAM Tools for LSPs
  • LSP Ping
  • MPLS BFD
  • IETF existing OAM tools for PWs
  • VCCV supporting ICMP Ping
  • VCCV supporting LSP Ping
  • VCCV supporting BFD (with and without IP/UDP
    encapsulation)

MPLS-TP OAM Requirements Draft (draft-vigoureux-m
pls-tp-oam-requirements-00.txt)
  • Analyze whether the existing IETF OAM tools can
    be used to fulfill the requirements
  • Identify which tools need to be extended to
    comply with the requirements
  • Identify whether new tools need to be defined

3
Organization of the Document
  • Discusses first the architectural requirements
    and the general principles of operations, and
    then the requirements for the OAM functions.
  • The existing tools are evaluated for each aspect
    and gaps (if exist) are identified.
  • Recommendations and guidelines are provided.

4
Organization of the Document
Remote Defect Indication
Alarm Suppression
Connectivity Verification
Architectural Requirements
General Principles of Operations
Continuity Check
Requirements for the OAM Functions
Analysis of OAM Requirements
  • The existing tools are evaluated for each and
    gaps (if exist) are identified.
  • Recommendations and guidelines are provided.

5
Principal Recommendations
  • Define Tandem Connection entity for both LSPs and
    PWs
  • Extend ACH to provide control channel for MPLS
    Sections, LSPs and Tandem Connections
  • Define a VPCV (Virtual Path Connectivity
    Verification) mechanism for LSP and Tandem
    Connection, reusing as much as possible the same
    principles of operation as VCCV.
  • Extend BFD to support Point-to-Multipoint
    transport paths
  • Define tools to support the following functions
    (with the ability to authenticate the messages)
  • Connectivity Verification (BFD does not support
    communication to MIPs)
  • Alarm suppression
  • Lock indication
  • Packet loss measurement
  • Diagnostic test
  • Trace-route (LSP Ping can not be used as it is
    dependent on IP functionality)
  • Delay Measurement
  • Remote Defect Indication
  • Client signal fail

6
Principal Recommendations (Contd.)
  • Extend the management-plane/control-plane to
    support the configuration of the OAM entities and
    the set of OAM functions they need to support
  • To be considered change the name of the ACH
    CV Type to Protocol Type in order to avoid
    confusion with the CV function.

7
Conclusion
  • Authors are soliciting more comments and feedback
    from WG
  • Authors believe that current draft version is
    comprehensive
  • Should it become a WG document?
  • Authors request the WG to adopt the
    recommendations
  • Identify a list of documents that should be
    extended.
  • Identify a list of documents that should be
    specified.

8
Questions
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