Label Switched Path LSP Dynamical Provisioning Performance Metrics in Generalized MPLS Networks draf

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Label Switched Path (LSP) Dynamical Provisioning
Performance Metrics in Generalized MPLS
Networksdraft-xie-ccamp-lsp-dppm-00.txt

• Guowu Xie,SJTU
• Guoying Zhang, CATR MII
• Jianghui Han, IXIA
• Xueqing Wei, Fiberhome
• Jianhua Gao, Huawei

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Motivations

• Why need for measuring and characterizing LSP
  provisioning performance in GMPLS networks.
• Requirements of dynamical provisioning capability
  in GMPLS Networks interactive broadband
  multimedia services.
• Let the requirement of applications and the
  provisioning capability of the network be mapped
  to each other
• Essential to the GMPLS network maintenance and
  optimization.
• Standardized metrics and the way to measure them
  precisely should be defined.
• The objective is to maximize common understanding
  of LSP provisioning performance between the
  service providers and network users.

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Methodology

• GMPLS LSP performance measurement is similar to
  IP network
• GMPLS control plane is a packet switched network
• the LSP setup/release delay is similar to the
  round-trip Delay in IP networks.
• We use the structures and notions introduced and
  discussed in the IPPM framework document,
  RFC2330 RFC2679 RFC2681, and we define the
  metrics according to GMPLS specific message
  exchange scenarios.

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Outlines

• Singleton definition of performance metrics
• Unidirectional LSP Setup Delay
• Bidirectional LSP Setup Delay
• LSP Graceful Release Delay
• Samples definition of performance metrics
• pseudo-random Poisson process is used
• Other models may be choosed
• Statistics Performance
• Min/Max/Median/Percentile
• Variance

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Outlines

• Measuring these metrics is important for
  applications scheduling.
• Longer LSP setup delay will incur higher
  overhead for the requesting application.
• Also reflects the status of control plane.
• For LSPs traversing the same route, longer setup
  delays may imply congestion in the control
  channel or high control element load.

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Real Network Demonstration

• China High Performance Broadband Information
  Network (3TNET) ----863 project Sponsored by the
  Ministry of Science and Technology.
• Circuit-switched and packet-switched hybrid
  network to support large-scale interactive
  broadband streaming media.
• Network Infrastructure IP ASON/GMPLSDWDM
• Services VOD, DVB-IP, high speed Internet access
• ASON/GMPLS network has some enhanced features of
  burst scheduling and multicasting, to provide
  dynamic and automated provisioning of end-to-end
  Ethernet connections to media server and IPTV
  head-ends.
• Dynamic point-to-multipoint connections for IP
  head-ends
• Periodic connection provisioning for media
  server, every 10 secs

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Measured Performance in the Field Trial

• Delay Variance observed at any load. Higher load
  will lead to higher variance and longer
  setup/release delay.

Average setup delay 668 ms 99.9 setup delay less
than 1000ms
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Open Issues

• time synchronization between the testing nodes
• other circumstances, such as point-to-multipoint
  multicast LSP, LSP rerouting
• Enhancement of MIBs support monitoring of LSP
  provisioning metrics on GMPLS nodes, for
  maintenance/optimization.
• Expect to receive feedbacks and suggestions!