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I limited the Juniper Switch EX3300's Interface input and output traffic speed.

But I want to test wether the configuration is work.

Is there any software for check this port speed limit function?

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Lots of options actually, though many of them are easiest to use on UNIX-like platforms.

Possibilities include:

  • netperf: One of the original network performance benchmarks, I haven't used it personally, but lots of people do use it and the results are generally considered to be very accurate.
  • iperf3: Designed for testing bandwidth at layer 4, gives very easy to understand results and has good documentation. THis is what I would personally recommend.
  • nuttcp: A second derivative of one of the original TCP performance testing tools. I've not used it much myself, but know a lot of people who have.
  • bing: A rather neat tool that uses ICMP to test links with minimal overhead, which can actually test sub-sections of the full path between two systems.
  • bwping: Uses ICMP just like bing, and also reports on RTT and some other info you would normally get from the regular ping command.
  • flowgrind: Similar to iperf, but allows tracking multiple links simultaneously.
  • As spartan as it may seem, combining netcat/nc and dd can actually give you reasonably good estimates of network performance for lower speed (1 GbE and less) links.
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