Sunday, March 22, 2015

HIGH-SPEED PACKET GENERATOR: MOONGEN

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MoonGen is a high-speed scriptable packet generator. The whole load generator is controlled by a Lua script: all packets that are sent are crafted by a user-provided script. Thanks to the incredibly fast LuaJIT VM and the packet processing library DPDK, it can saturate a 10 GBit Ethernet link with 64 Byte packets while using only a single CPU core. MoonGen can achieve this rate even if each packet is modified by a Lua script. It does not rely on tricks like replaying the same buffer.

MoonGen can also receive packets, e.g. to check which packets are dropped by a system under test. As the reception is also fully under control of the user’s Lua script, it can be used to implement advanced test scripts. E.g. one can use two instances of MoonGen that establish a connection with each other.

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