N2os overview
- 1. openN2OS Overview (Neutralized Network Operating System) July 2014
- 2. -2- High Availability : What ? High availability refers to a system or component that is continuously operational for a desirably long length of time.
- 3. -3- High Availability : How To ? High Availability is achieved through the manipulation of MTBF and MTTR parameters of system design to meet availability requirements. Increase MTBF Experienced engineering team. Peer review of all code. Simple design. Static and runtime analysis tools such as valgrind, lint, high compiler warning levels, coverity, lcov. Test coverage of the software. Design operator error out of the system. Decrease MTTR Configuration Model 2N Standby Model Hot Standby Model Cold Standby Model Warm Standby Model
- 4. -4- N2OS : The Solution !! N2OS Targeting the open network operating system platform which supports all types of network equipment in the world. Open Platform Neutralized Architecture Operating systemOperating system like quagga, zebos and cisco IOS. The architecture is not biased to specific purpose.
- 5. Application Protocols Layer N2OS Core Layer Kernel -5- N2OS Platform N2OS Layered Architecture L2 switching L3 routing Label switching traffic filtering security engine Routing Information Base Manager Multicast Routing Information Base Manager Label Information Base Manager Process Manager Policy Manager Checkpoint Manager PortIf Manager Event Management App. IPC LCS Log/Trace Switching protocols Routing protocols MPLS protocols Multicast protocols SNMP OAMApplications N2OS core kernel
- 6. Heavy NSI Manager Limitation of modularization -6- Key Feature (1) Flexible Modularized Managers Problem Modularization of NSI Manager P2P, P2MP Message Manager Innovations L2 Protocols L3 Protocols Mcast. Protocols MPLS Protocols NSI Manager L2 Protocols L3 Protocols Mcast. Protocols MPLS Protocols New Protocols L2 NSI MGR New NSI MGR MPLS NSI MGR Mcast. NSI MGR L3 NSI MGR NSIMSG Manager (P2P, P2MP ) “Flexibility Innovation !” RIB RIB
- 7. Key Feature (2) Parallel Memory Access L2 Protocols L3 Protocols Mcast. Protocols MPLS Protocols New Protocols NSIMSG Manager (P2P, P2MP ) RIB L2 Protocols L3 Protocols Mcast. Protocols MPLS Protocols New Protocols NSIMSG Manager (P2P, P2MP ) Sequential Memory Access Parallel Memory Access RIB Memory Access Performance Bottleneck -7- Problem Parallel Read Processing Priority based Write Processing Innovations “Fast Processing of Massive Entries !” L2 NSI MGR New NSI MGR MPLS NSI MGR Mcast. NSI MGR L3 NSI MGR L2 NSI MGR New NSI MGR MPLS NSI MGR Mcast. NSI MGR L3 NSI MGR
- 8. Key Feature (3) Event-Driven Fast Route Convergence Route update Delete Route update Packet Forward BGP RIB Table RIP Other Forwarding H/W Scanner Periodic(60) Scanning For routing changes Route Route BGP don’t know if the RIP route is deleted or not immediately. BGP Table RIP Table Other Table Route update Route update Route update Packet Forward BGP Event Handler update update update EVENT RIB Table RIP Other Forwarding H/W Real-Time Notification !!! Route Route Slow Detection of Route State Change Slow Route Convergence -8- Problem Real-Time State Change Detection Innovations “Assurance of Network Safety !”
- 9. Key Feature (4) Cross-Layer Non-Stop Active Routing Active Control Processor NOS Core BGP … OSPF information repository Kernel networking information fttcpd health cared syncd Standby Control Processor NOS Core BGP … OSPF information repository Kernel networking informationfttcpd health cared syncd NOS Core BGP … OSPF peer node Kernel depends on peer node for recovery Single-Layered Graceful Restart Cross-Layered Non-Stop Active Routing Peer-Node Dependency Low Availability -9- Problem Nonstop Active Routing based on System Health-Care Innovations “ High Availability(99,999%) !”
- 10. Key Feature (5) Live update & In Service Software Upgrade(ISSU) NOS Core Software Upgrade-Mgr LSMU-IF Old Module New Module LSMU Procedure 1. upgrade command Modules REP LSMU-IF LSMU-IF 2. upload new module 3. update 4. backup 5. register Forwarding H/W Active N2OS Standby N2OS ISSU Manager Switch-Over Synchronize *ISSU: In-Service Software Upgrade ISSU un-support Live Update un-support -10- Commercial Product’s Problem Framework for Live Update Enable Dynamic Software Upgrade without no service outage Innovations “ Dynamic Software Upgrade w/o No Service Outage !” *LSMU: Live Software Module Upgrade
- 11. Test Scenario Commercial Test Equip. Test Guy Manual Analysis and Report High Cost and More Human Resource Manual Automatic Testing Tool w/ Test Scenario Test Automation Low Cost and Human Resource Automatic Analysis and Report Test Automation with Testing Tool Automated Analysis and Report of Test Result Automated Test Environment Key Feature (6)