Inter-domainRoutingSimulationbySSFNet.pptVIP

Inter-domain Routing Simulation by SSFNet Wang Lijun Tsinghua University Jul 3, 2006 Inter-domain Routing Autonomous system ISP, University, Company, e.g. CERNET, CHINACOM About more than 19,000 ASes Glued together by BGP Border Gateway Protocol Flexibility Scalability Stability Research on inter-domain routing Collecting BGP data from Internet Active method Log BGP table and Update Route Views Project RIPE Routing Information Service Simulation SSFNet What is SSFNet SSFNet is a Java SSF-based simulator of Internet protocol Features IP packet-level granularity all components have multiple configurable attributes components all inter-operable designed to handle large, complex simulations SSFNet Architecture SSF : Scalable Simulation Framework a standard for discrete-event simulation of large, complex systems DML : Domain Modeling Language a standard for model configuration and verification supports extensibility, inheritance and substitution of attributes SSFNet : SSF Network Models open-source Java models of protocols network elements assorted support classes Simulation Layers IDE Package SSFNet Layer Network Components DML Layer DML Example Attribute/Value pairs Simple attributes Nested attributes The Protocol Stack NHI Addressing Internal format for model-building convenience N:N:N: ... :N:H(I) N = network id H = host id I = interface id top-level Net does not have id local vs. global local link need not attach to global NHI address networks and hosts may be abbreviated or omitted Hierarchy Example Execution Download distribution ssfnet_raceway[1].tar.gz Build and validate ~/ssfnet/$:make Create and execute DML model java SSF.Net.Net runtime dml-file SSF.OS.BGP4 Functionality Finite state machine, timers, RIB TCP transport Peering: exterior and interior Route reflection Messages and path attributes Policy filter based on path attribute attribute modification Monitoring of protocol operation gather stats on practically any event of interest Experiment DML Exper