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Object-Oriented Design and Implementation of Fault Management Function for MPLS network

Object-Oriented Design and Implementation of Fault Management Function for MPLS network. Sung-Jin Lim , Ryung-Min Kim, and Young-Tak Kim Advanced Networking Technology Lab. Dept. of Information & Communication Engineering Graduate School Yeungnam University, Korea

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Object-Oriented Design and Implementation of Fault Management Function for MPLS network

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  1. Object-Oriented Design and Implementation of Fault Management Function for MPLS network Sung-Jin Lim , Ryung-Min Kim, and Young-Tak Kim Advanced Networking Technology Lab. Dept. of Information & Communication Engineering Graduate School Yeungnam University, Korea Email: genie@yumail.ac.kr, degger@nownuri.net, ytkim@yu.ac.kr http://antl. yu.ac.kr

  2. Introduction • Traffic engineering has been emphasized to offer end-to-end QoS-guaranteed multimedia services in Next Generation Internet. • Fault restoration in traditional IP network vs. MPLS network • The primary goals of fast restoration by fault management function. • QoS guaranteed differentiated path protection. • Guaranteed bandwidth of backup LSP at fault occurrence. • We propose a fault management with fast rerouting restoration scheme in MPLS network. • Design and implement differentiated path protection and link. preemption priority among LSPs. • Key technologies • Traffic Engineering, Differentiated Service, Restoration, Protection, and Object-Oriented Design.

  3. Related works • Fault restoration model • Rerouting vs. protection switching • Rerouting • Protection switching : • Pre-established backup path SRLG-disjoint with working LSP • 1:1, 1:N, M:N, 1+1 path protection switching • Local repair vs. path protection (A) Link protection (B) Node protection (C) Path protection Figure 1. Protection switching model

  4. Related works (cont.) • Fault Management Architecture of Next Generation Internet • Fault Management Components in TINA • Fault Management MOs in TMN • Fault Management Activities • Alarm surveillance • Testing • Fault localization • Fault correction • Trouble administration • MPLS Fault Management System • RATES, • Cisco MPLS Tunnel Builder, • Sheer Networks’ Broadband Operating Supervisor(BOS)

  5. Restoration Schemes • Differentiated Path Protection Option • Example scenario of applying protection path options according to MPLS service class. • Preemption Priority based restoration of LSPs • Guaranteed bandwidth of backup LSP for the protected working LSP. Table 1. Differentiated Path Protection scheme

  6. Design and Implementation of Fault Management System • Fault restoration procedure with Managed Objects (MOs) Figure 2. Fault Restoration on MOs

  7. Design and Implementation of Fault Management System (cont.) • Fault Restoration Function • SNMP trap handler implementation • Alarm Manager GUI Figure 3. Event Log GUI Figure 4. Alarm Log GUI

  8. Design and Implementation of Fault Management System (cont.) • Design and Implementation of NMS Core Figure 5. MO Classes of MPLS LSP Fault Management Figure 6. MO Classes of link/node Fault Management

  9. Performance Analysis of Fast Restoration • Test Network Configuration • Three core routers LER_E, LER_ F, and LER_G • Four CE router CE_A, CE_ B, CE_ C, and CE_ D • Two link types • POS (Packet Over SONET ) with 155Mbps – Solid line • Serial with 2Mbps – Dashed line Figure 7. Test network configuration

  10. End-to-end Performance Comparisons of Differentiated Protection Options(1) • End-to-end Performance Comparisons of Differentiated Protection Options Figure 8. Fast-reroute by NMS Figure 9. M:N fast-reroute by NMS Figure 11. Path-Option mode by Cisco Figure 10. Standby mode by Cisco Figure 12. Link-Protection by Cisco

  11. End-to-end Performance Comparison by Differentiated Protection Options • Differentiated Restoration performance by precedence Table 2. Priority and bandwidth between LSPs Figure 13. Same priority Figure 14. Different priority

  12. Conclusion • We proposed an object-oriented design and implementation scheme for • 1:1, 1:N, M:N fast-reroute by NMS • Standby mode, Path-option and link/node protection scheme in Cisco MPLS Routers. • The Proposed Fault Management Scheme for MPLS Network Provides • Reliability that guarantee the required bandwidth of backup LSP after fault restoration • Differentiated protection path option • Object-Oriented MO design and implementation of network nodes and links for better expansibility with equipments form various vendors.

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