Luận Văn GMPLS multi-layer networking Routing and constraint-based path computation in optical network segmen

Table of Contents
Abstract . i
Acknowledgments ii
Table of Contents iii
List of Figures v
List of Tables .vi
1 Introduction . 1
1.1 Objectives .2
1.2 Thesis outline . 2
2 Introduction to GMPLS .3
2.1 Background 3
2.2 Architectural components .4
2.2.1 Control plane extensions . 4
2.2.2 Generalized labels . 5
2.2.3 Bidirectional data paths . 6
2.2.4 Hierarchies .6
2.2.5 Protocol suite .7
2.3 Routing with OSPF-TE 8
2.3.1 Network topology dissemination .8
2.3.2 Type-Length-Value triplets . 9
2.4 Signaling with RSVP-TE . 10
2.4.1 Installing LSP state 11
2.4.2 Removing LSP state 12
2.4.3 Error handling 12
2.4.4 Explicit routes 13
3 Constraint-based path computation .14
3.1 Introduction to the PCE 14
3.1.1 Architectural models . 14
3.1.2 Operational modes .15
3.2 Constraint-based algorithms .16
3.2.1 Functional overview 16
3.2.2 Proposed algorithms 17
4 Optical switching constraints 19
4.1 Wavelength switching 19
4.1.1 Routing implications . 19
4.1.2 Full conversion capability . 20
4.1.3 Limited or no conversion capability 21
4.2 Blocking switch architecture 22
4.3 Impairments 23
5 Implementation 25
5.1 Virtual test-bed design 25
5.1.1 Virtual machines 25
5.1.2 Control plane configuration .26
5.1.3 Data plane configuration . 27
5.2 GMPLS and PCE extensions 28
iii
5.2.1 Wavelength availability .28
5.2.2 Interface selectivity . 29
5.2.3 User-defined constraints 30
5.2.4 Candidate CSPF algorithm 31
5.3 Software implementation . 33
5.3.1 Open source software suite 33
5.3.2 Implemented Zebra extensions 33
5.3.3 Implemented RCE extensions . 34
6 Verification and analysis . 35
6.1 Test-bed verification .35
6.2 Software implementation verification 35
6.3 Software implementation performance 37
6.3.1 Theoretical network overhead . 37
6.3.2 Time efficiency 38
6.3.3 Space efficiency 40
7 Conclusion and future work 42
7.1 Future work 42
References 43
Appendix A: Abbreviations and acronyms 45
Appendix B: Table of OSPF-TE VTY commands .47
Appendix C: Table of DRAGON software changes 48
Appendix D: A RCE stack and heap profile 49