Datacenter Network Simulation using ns3

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Presentation transcript:

Datacenter Network Simulation using ns3 Course Project for CS05112

Objective Simulate a datacenter network using ns3. Experiment two traffic patterns. Examine the network. Improve the network.

Datacenter network topology

Datacenter network topology Description 8 servers: n1~8; 4 ToR switches: t1~4; 2 aggregation switches: a1~2; 1 core switch: c1 The network is partitioned into two clusters The links connecting to c1 are PPP, or the other networks are Ethernets, the networks’ capacities are shown on the topology graph. All the end-end delays on the networks are 500ns. How the IP addresses are assigned can be found on the topology graph. All the switches behaves like OSPF routers.

Traffic patterns Pattern 1: inter-cluster traffic Each server communicates using TCP with another server that comes from different cluster For example, 1-5, 6-2, 3-7, 8-4 Pattern 2: many-to-one traffic Select one server as the sink, and all the other servers communicate to it Simulate the two patterns separately, obtain the throughput that the network can achieve, and find out the network bottleneck, how to improve the network.

Submit your project Your ns3 source code and readme file. Your project report document, in which you should: Explain how you simulate the DC network and the two traffic patterns, present the simulation outputs (trace, graph, statistics) Identify the network bottleneck, show your evidence, and explain how you can improve the network? Add more core switches and enable ECMP routing to improve the network, how many core switches should be added? Testify your solution by experiment (code + simulation outputs)

Scoring criteria Submit: source code + report + trace files The report should： Explain your source code Present your simulation results: how and where you measure the traffics, what is the evaluation metrics, etc. Analysis on the evaluation results (Important) Results and analysis on how to improve the network. (5 bonus pt.) Topology Code Results + analysis (Important)