On 7 August 2017 at 10:25, CiscoNSP List <cisconsp_l...@hotmail.com> wrote:

Hey,

> Looking for an alternative to IPerf for link testing - Having some 
> "reliability" concerns with IPerf results (Primarily with simultaneous data 
> transfers) - Any recommendations are greatly appreciated (10G capabilities 
> would be fantastic, but not 100% necessary) - Has anyone used/tried Ostinato 
> ? Primarily after a tool that can provide load testing results (simultaneous 
> bidirectional, one direction, and UDP/TCP are primary requirements...Happy to 
> look at a commercial product/appliance if it ticks all the boxes, but not 
> wanting to spend a fortune :)

I am not aware of not-broken-by-design UDP performance measurement
software. iperf,  Netperf at least are entirely broken as they use OS
UDPSocet, which does not perform. AF_PACKET might be able to reach 1GE
on small packets, which I currently view as absolutely minimum for
testing.
TCP makes very little sense, as I want to test the network, not TCP
settings of end-hosts. Friend of mine and I started writing AF_PACKET
based testing tool with rust, and initial results show that 1.5Mpps is
entirely reasonable on typical laptop, but 15Mpps is not. For 10GE
you'd need something like netmap or DPDK based solution, which also
means you'd need to have dedicated NIC for this, which to me is
entirely another class of software, these exists, you might want to
check out https://trex-tgn.cisco.com/.

If you're looking for commercial kit, I'd say go with Spirent or Keysight.

-- 
  ++ytti
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