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Label Switched Path (LSP) Dynamical Provisioning Performance Metrics in Generalized MPLS Networks draft-xie-ccamp-lsp-dppm-00.txt Guowu Xie,SJTU Guoying Zhang, CATR MII Jianghui Han, IXIA Xueqing Wei, Fiberhome Jianhua Gao, Huawei 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. 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. 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 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. 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/GMPLS+DWDM – 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 Measured Performance in the Field Trial 500 1000 1500 2000 2500 500 1000 1500 2000 2500 99.999 1000 500ms/100ms 800 Setup Delay (ms) Cumulative Counts 99.9 600 400 99 95 80 60 40 20 5 1 0.1 0.01 16000 200 0 0 100 200 14000 300 12000 Counts Request Sequence • Delay Variance observed at any load. Higher load will lead to higher variance and longer setup/release delay. 10000 8000 6000 4000 2000 0 Setup Delay (ms) Average setup delay 668 ms 99.9% setup delay less than 1000ms Open Issues • time synchronization between the testing nodes • other circumstances, such as point-tomultipoint 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!