cnis: A topology information service with DWDM plugin

Transcription

1 cnis: A topology information service with DWDM plugin Vilmos Bilicki PhD bilickiv@inf.u-szeged.hu University of Szeged, Department of Software Engineering/ NIIFI

2 Outline Short introduction of the WLAB research group at USZ cnis/opencnis at GN3 Topology discovery Motivation for the DWDM topology discovery Standards? Our Approach Current focus High level domain model for DWDM Results Next steps Summary 2

3 Software Engineering Department (SED) / WLAB SED More than 100 people (PhD researchers, PhD students, project employees, students) WLAB More than 20 people Industry driven R&D Innovative projects National/EU funded research Pure industrial developments University of Szeged, Department 3

4 GN3/cNIS cnis (led by PSNC) AutoBahn Ishare Our commitment (NIIFI/USZ) Software Architecture for Topology Discovery Plugins for topology discovery: Ethernet MPLS DWDM Automatized Network simulator for Unit Testing 4

5 Topology discovery modules Information sources: SNMP CLI How to merge the information coming from different sources? Aspect Oriented Approach Design Patterns Ontology Matching L1 Control Desc. Discover Ethernet Automatic selection Control plane - active discoveries L2 L3 Control Desc. Discover MIB Control Desc. Discover SPT Automatic selection Control Desc. Discover Cisco SPT Control Desc. Discover Ether channel Automatic selection Control Desc. Discover Cisco ETH Ch - enabled modules - maximal number of threads - maximal bandwidth 5

6 Motivation behind DWDM topology discovery Existing tools at NOC: Nagios Cricket Provider specific closed solutions The network: Hybrid multilayer/multi technology Issues: Alarm storm Manual Inventory Configuration of OAM tools IP MPLS/GMPLS OTN DWDM Virtual Channels LSP ODU/OTU Lambda 6

7 Standards Theory: IETF: IP, etc GMPLS/MPLS ITU-T LMP G.872 G.874 OIF NDL Issues Practice: Are they implemented? What is the best domain model? How can we connect the different layers to each other? Interlayer topology and resource discovery? 7

8 Elaborating the domain model Collect and analyze the information sources (IETF Mibs, ITU-T interfaces, Ontologies specified for this field) Elaborate/Refine the domain model Run PoC projects Test the code in real environment Validate the results 8

9 Current focus and results Focus on the topology related aspects Information source: Alcatel proprietary MIBs Discovery of : Physical assets Location Shelf/Slot/Port Physical connection between the ports Lambda topology Active wavelengths on a link OCX switching tables Alien wavelengths 9

10 High level DWDM Specific Domain Model 10

11 Results 11

12 About the event aggregation Knowing the interlayer dependency is not enough The correlation among the events could be described and handled in different ways One approach one could apply is to use ontologies and reasoning During the next phase we would like to build an ontology based description of the network and the errors happening (Network Level Alarm Correlation) 12

13 DWDM Physical Assets Schedule M1 M2 DWDM Lambda OTN: OTU, ODU, OPU Integration with IP, GMPLS Nagios, Cricket export OpencNIS Module Ontology based description Q Q Q Q

14 Summary Handling the alarm storms in hybrid networks is a challenge It is time consuming task to define the hierarchy and dependence of the events We made the first step toward DWDM topology discovery with real devices and real network 14

15 Thank you for listening! Q&A 15

16 Links

17 Backup slides OTN 17

18 Alarm Storm (Cisco) 18