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Open Network Laboratory

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pennie
18 diapositives · 335 Views · Oct 20, 2014

The Open Network Laboratory (ONL) at Washington University in St. Louis enables students and researchers to set up and experiment with networking configurations remotely. Developed by Prof. Jon Turner, ONL allows real-time visualization of network queues and traffic flows. This presentation covers the Remote Laboratory Interface (RLI), the process for setting up an SSH tunnel, and procedures for lab assignments. Participants will gain hands-on experience in networking concepts, including topology configuration, traffic monitoring, and congestion control.

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Open Network Laboratory
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  1. Open Network Laboratory Raj JainWashington University in Saint LouisSaint Louis, MO 63130Jain@wustl.edu Audio/Video recordings of this lecture are available on-line at: http://www.cse.wustl.edu/~jain/cse473-11/

  2. Overview • Open Network Laboratory (ONL) • Remote Laboratory Interface • Running ONL experiment • SSH Tunnel Configuration • Lab assignments Note: These slides are based mostly on presentations available at ONL website.

  3. Open Network Laboratory (ONL) • Developed by Prof. Jon Turner and his team at WUSTL • Allows students to set up networking configurations consisting of routers and hosts and experiment with them • Allows real-time visualization of various queues and traffic flows • Allows running programs on the hosts and filters on programmable routers • Also useful for research on networking protocols and applications requiring multiple hosts • All of the resources are available remotely for use by anyone.Any one can register and use. • Ref: http://onl.wustl.edu

  4. Sample Configuration Hosts Routers Traffic monitoring

  5. Physical ONL Hardware Recently updated to 10 GB (not shown) • NSP = Network Service Platform (Router) • CP = NSP Control Processor • GE = Gigabit Ethernet Switch • 100+ hosts • Configuration Switch connects any router port to another router or host

  6. Physical ONL Hardware (Cont) [Source: https://onl.wustl.edu/presentations/wustl-573-sp09-1.pdf

  7. Using ONL – 7 Steps • Read ONL tutorial • The ONL Tutorial, http://wiki.arl.wustl.edu/onl/index.php/The_ONL_Tutorial • Remote Laboratory Interface, http://wiki.arl.wustl.edu/onl/index.php/Remote_Laboratory_Interface_%28RLI%29 • Getting started, https://onl.wustl.edu/restricted/getting-started.html • SSH (on MACs and Linux) or Windows Putty, http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html • Install Java Runtime Environment (JRE) V1.6 or higher,Check “java –version”, if necessary download fromhttp://java.com/en/download/manual.jsp • Download RLI.Jar, https://onl.wustl.edu/restricted/export/RLI.jar • SSH to onl.wustl.edu • Run RLI, Prepare your configuration • Reserve time, Commit and Run. Commit again after any topology modification.

  8. SSH • SSH – • This will open a SSH window. Login. [Source: https://onl.wustl.edu/presentations/wustl-573-sp09-1.pdf

  9. SSH Tunnel Configuration • Build before each experimental session • Allows your RLI to communicate with ONL daemon • Needed to make reservation and commit • SSH tunneling Unix command line • ssh -L 7070:onlsrv:7070 username@onl.arl.wustl.edu • Windows PuTTy • Windows SSH client

  10. ONL SSH Restrictions • You can login into ONL hosts in your configuration • Same password for ONL host login and Web login • You can SSH from one ONL host to anotherPassword-free SSH between ONL hosts • You can only access ONL hosts assigned to your experiment • From your PC, you can only SSH to onl.wustl.eduGets connected to onlusr – the ONL user host • Firewall blocks all connections from within ONL to outside • You can pull (save) from ONL host to your PCYou can not save in ONL host from your PC • You can push (open) to ONL host from your PCYou can not open a ONL host file from your PC

  11. Remote Laboratory Interface • Using a Java RLI you can configure and run experiments from your computer using a SSH tunnel • On your computer (not SSH window) • cd c:\.onldir • java –jar rli.jar

  12. RLI (Cont) • NSP: IPv4 Router with 8 1GbE • GigE Switch: 1GbE and 10GbE • Link • PC1Core: Single core PCwith 1 GbE • PC8Core: 8-core PC with 10GbE • NetFPGA: Programmable FPGA • Generate Default Routes • New Hardware type • IXPCluster: Intel Network Processor (IXP 2800) based programmable routers

  13. RLI (Cont)

  14. RLI (Cont) • To run the experiment, you need to commit your configuration to physical hardwareOnly one experiment at a time Need to reserve • No reservation required for designing the experiment (setting the configuration etc)

  15. RLI (Cont) • To run the experiment, you need to commit your configuration to physical hardwareOnly one experiment at a time Need to reserve • No reservation required for designing the experiment (setting the configuration etc)

  16. RLI (Cont) Routing and forwarding Configure network topology Real-time charts Adding filters

  17. Lab Assignments Objective: Hands-on experience & apply concepts Lab assignment 1: Familiarize with ONL through ONL tutorial Network topology, packet path (forwarding), link capacity Lab assignment 2: Transmit and monitor packet traffic Routing (edit routing table) Analyze behavior of a queue Lab assignment 3: Congestion Control

  18. Summary Open Network Laboratory (ONL) allows remote users to setup a network configuration and experiment Remote Laboratory Interface (RLI) is a java frontend for designing and running experiments Need to setup SSH tunnel to ONL server Need to reserve the physical equipment before committing your experiment to hardware Recommend using during working hours to avoid crashed systems and other problems