NDLI: Detecting Network Topology and Packet Trajectory with SDN-enabled FPGA Platform

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Detecting Network Topology and Packet Trajectory with SDN-enabled FPGA Platform

Content Provider	ACM Digital Library
Author	Wang, Yuxiang Cheng, Guang Dai, Mian
Abstract	Software-defined networking brings extra complexity to debugging while enhancing network manageability. The competition between applications and subtle bugs in controllers or switches may cause inconformity between control plane logic and data plane behavior. Tracing packet trajectory through the network is a direct way to verify whether data plane processes packets correctly according to control plane policy. We introduce NetMagic, a SDN-enabled switch based on FPGA which can be managed remotely using a custom protocol, and present the detection of network topology and packet trajectory in the network consists of NetMagics. We use probe packet to reproduce the trajectory of arbitrary production packet only by adding three rules per NetMagic to record path history in on-board RAM. The core idea is that we install a hash function both in the controller and NetMagic to process the header of probe packets which considerably reduce the usage of RAM space and facilitate the collection of trajectory data. The evaluation shows that our implementation works properly under high concurrency of tracing tasks by adjusting the parameter of hash function.
Starting Page	7
Ending Page	13
Page Count	7
File Format	PDF
ISBN	9781450341813
DOI	10.1145/2935663.2935670
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-06-15
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Netmagic Path tracing Software-defined networking
Content Type	Text
Resource Type	Article

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