Toward Scalable Routing Experiments with Real-Time Network Simulation

Li, Yue; Liu, Jason; Rangaswami, Raju

doi:10.1109/pads.2008.25

Cited by 6 publications

(5 citation statements)

References 29 publications

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“…which we could run the nario, Figure 10 ulation research, there have ents realized in the form of ulab, GTNetS, PDNS, SSF, ame just a few. Among the ion for higher fidelity, the dilation [1], time jails [9], virtual time [10], real-time interface optimizations [8,11,12], and others [13][14][15][16]. However, we are not aware of prior work on simulation-specific schedulers for simulating multi-core guests on multi-core hosts.…”

Section: Analysis Of Resultsmentioning

confidence: 99%

Efficiently Scheduling Multi-Core Guest Virtual Machines on Multi-Core Hosts in Network Simulation

Yoginath

Perumalla

2011

2011 IEEE Workshop on Principles of Advanced and Distributed Simulation

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Virtual machine (VM)-based simulation is a method used by network simulators to incorporate realistic application behaviors by executing actual VMs as high-fidelity surrogates for simulated end-hosts. A critical requirement in such a method is the simulation timeordered scheduling and execution of the VMs. Prior approaches such as time dilation are less efficient due to the high degree of multiplexing possible when multiple multi-core VMs are simulated on multi-core host systems. We present a new simulation time-ordered scheduler to efficiently schedule multi-core VMs on multi-core real hosts, with a virtual clock realized on each virtual core. The distinguishing features of our approach are: (1) customizable granularity of the VM scheduling time unit on the simulation time axis, (2) ability to take arbitrary leaps in virtual time by VMs to maximize the utilization of host (real) cores when guest virtual cores idle, and (3) empirically determinable optimality in the tradeoff between total execution (real) time and time-ordering accuracy levels. Experiments show that it is possible to get nearly perfect time-ordered execution, with a slight cost in total run time, relative to optimized non-simulation VM schedulers.Interestingly, with our time-ordered scheduler, it is also possible to reduce the time-ordering error from over 50% of non-simulation scheduler to less than 1% realized by our scheduler, with almost the same run time efficiency as that of the highly efficient nonsimulation VM schedulers.

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Section: Analysis Of Resultsmentioning

confidence: 99%

Efficiently Scheduling Multi-Core Guest Virtual Machines on Multi-Core Hosts in Network Simulation

Yoginath

Perumalla

2011

2011 IEEE Workshop on Principles of Advanced and Distributed Simulation

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“…We extend our previous work [15] in supporting realistic and relatively sophisticated interdomain routing exercises, especially for training purposes. 2.…”

Section: Introductionmentioning

confidence: 83%

“…We conducted preliminary studies to evaluate the timing issue of our platform. Experiment results suggest that the forwarding plane offloading approach adopted by our routing experiment platform can significantly reduce the traffic load across the emulation infrastructure [15]. Studies show that our platform is capable of supporting large-scale routing experiments.…”

Section: Timing and Scalabilitymentioning

confidence: 90%

“…XORP uses the command channel to transfer forwarding table updates (such as adding or deleting forwarding table entries) and interface configuration requests (such as activating or disabling a network interface) to the corresponding router node in simulation. A detailed description of this forwarding plane offloading approach can be found in our previous paper [15].…”

Section: The Architecturementioning

confidence: 99%

“…We have developed a real-time routing experiment platform for realistic, scalable and flexible routing experiments (see our preliminary work in [15]). The platform can seamlessly incorporate open-source router software (in particular, XORP [13]) using real-time network simulation and machine virtualization technologies.…”

Section: Introductionmentioning

confidence: 99%

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Real-Time Security Exercises on a Realistic Interdomain Routing Experiment Platform

Liljenstam

Liu

2009

2009 ACM/IEEE/SCS 23rd Workshop on Principles of Advanced and Distributed Simulation

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We use a realistic interdomain routing experiment platform to conduct real-time attack and defense exercises for training purposes. Our interdomain routing experiment platform integrates open-source router software, real-time network simulation, and light-weight machine virtualization technologies, and is capable of supporting realistic large-scale routing experiments. The network model used consists of major autonomous systems connecting SwedishInternet users with realistic routing configurations derived from the routing registry. We conduct a series of real-time security exercises on this routing system to study the consequence of intentionally propagating false routing information on interdomain routing and the effectiveness of corresponding defensive measures. We describe three kinds of simplistic BGP attacks in the context of security exercises designed specifically for training purposes. While an attacker can launch attacks from a compromised router by changing its routing policies, administrators will be able to observe the adverse effect of these attacks and subsequently apply appropriate defensive measures to mitigate their impact, such as installing filtering rules. These exercises, all carried out in real time, demonstrate the feasibility of largescale realistic routing experiments using the real-time routing experiment platform.

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