Internet Service Survivability over Optical WAN to Cover Multi-Server Locations

1. Internet Service Survivability over Optical WAN to Cover Multi-Server Locations Osanori Koyama, Ken Takahashi, and Yutaka Katsuyama Graduate School of Engineering, Osaka Prefecture University

2. Background The progress of the WWW technologies makes it possible to share various types of information stored in servers with many client machines in an effective way. The internet traffic increases rapidly. Optical fiber networksas a broadband infrastructure have been introduced. One approach Optical wide area networks(WANs) In this research, Optical fibers are used to connect LANs. Osaka Prefecture University

3. Problem The optical networks can transmit extremely high-capacity data. A serious problem occurs, if some failures take place in the networks. The management of the optical networks is especially important. Present stage of solution SNMP(Simple Network Management Protocol)is well known and is widely used to manage LANs. However It is necessary to manage the optical IP networks, which generally covers wide area, consisting of many LANs How to manage optical WAN? The methods to keep the survivability of such an optical WAN are not established. Osaka Prefecture University

4. What’s Presented ? Objective Clarifying a method to keep the internet survivability over optical WAN to cover multi-server locations (1)Network & System Configurations ・An optical WAN design to keep the survivability ・A design of software component used for the survivability Component Structure, Network Diagnosis Function and Process Flow (2)System Implementation & Performance ・Examination in the newly constructed optical WAN, which consists of 2 servers in different locations and 2 LANs in other different locations Osaka Prefecture University

5. Optical WAN Configuration Connecting LANs All the LANs and a node are connected with optical fibers in each area. All the combination of the nodes are also connected with optical fibers. The symbols Rij indicate the routes connecting nodes i and j. Optical Fibers This configuration enables us to share monitoring data to decide which by-pass route is suitable in case of some route or node failures. Osaka Prefecture University

6. O p t i c a l T r n s c i e v e r L A N 1 N o d e 1 C L 1 M R S e r v e r C L 2 W e b S e r v e r S R . . . D B A C A P M R C L 1 P r o c e s s C l i e n t S R C L 2 S C . . . O p t i c a l L A N 2 S W A P S W N o d e 2 L A N 1 S C L A N 2 System Configuration Optical Fibers Router Router Router SR MR Web Server Web Server Router Process Client AC : Active Component SC : Static Component Osaka Prefecture University

7. L A N P r o c e s s C l i e n t D a t a f o r I n i t i a l i z a t i o n G e n e r a l C l i e n t ( a ) ( b ) S C W e b B r o w s e r C o n n e c t i o n M o d u l e A C e ( b ) e c a C o n n e c t i o n c f a r M R f M o d u l e e r t o r e n ( c ) t S R I ( d ) n I O / O I / I M R o r T o O t h e r N o d e S R Module Structures of SC in Process Client and AC in a General Client I n i t i a l i z a t i o n A u t o S t a r t i n g M o n i t o r i n g M o n i t o r i n g D a t a C o n t r o l l e r C o n t r o l l e r D e t e c t i o n M o n i t o r i n g H T M L C o n t r o l l e r C o n t r o l l e r C o n v e r s i o n F a u l t D a t a T r a n s f e r D e t e c t o r (a) Monitoring Data Module (c) Fault Detection Module AC : Active Component (b) Monitoring Module (d) Data Transfer Module SC : Static Component Osaka Prefecture University

8. ( b ) ( a ) P P r r o o c c e e s s s s C C l l i i e e n n t t M o n i t o r i n g M o d u l e ( c ) . . . . . Optical Switch Network Diagnosis by the SC Function Node LAN Web Browser S C AC (3) (1) MR 4th Layer M o n i t o r i n g SR NIC Router Router CL 1 I/O Interface D a t a M o d u l e (2) Hub F a u l t (5) CL 2 D e t e c t i o n (2) M o d u l e SR MR (4) CL n Router S C To LAN AC : Active Component SC : Static Component Osaka Prefecture University

9. Dagnosis Flow Osaka Prefecture University

10. The Configuration for the Survivability Function Experiment The overall system consisted of 2 nodes, 4 LANs and 8 clients. 10-km optical lines Osaka Prefecture University

11. Monitoring Window Showing the Processes in the Survivability Function Experiment After the regular monitoring operation was confirmed, one client was intentionally disconnected from the router to give a failure in the network. The process client detected the failure location. Osaka Prefecture University

12. Monitoring the Network on a Web Browser Node to Node Node to LANs Osaka Prefecture University

13. Conclusion (1)Network & System Configurations for the Survivability of Optical WAN ・An optical WAN design to keep the survivability ・A design of software component used for the survivability Component Structure, Network Diagnosis Function and Process Flow (2)System Implementation & Performance ・A server for information processing and a process client for the network monitoring and route switching are installed in the node, and the network is monitored regularly in a background. ・When a failure occurs in the network, the process client detects it and makes a diagnosis automatically As a result It was clarified that the internet services could be kept over optical WAN, consisting of multi-server locations Osaka Prefecture University