Issue

• When I run throughput test by iperf. why using parameter of -B the throughput will better than without -B in RHEL 7.2.
  Iperf version:2.0.9
  Build 2G linux bond lacp mode.
  Ex: bondX=2G (1Gx2)

• RHEL 7.2 :

  • Server: iperf –s –i 1
  • Client: iperf –c (bondX_ip) –w 2m –l 64k –i 1 –P 8 –t 60
  • Result: 1.8Gbit/s

• RHEL 7.3 :

  • Server: iperf –s –i 1
  • Client: iperf –c (bondX_ip) –w 2m –l 64k –i 1 –P 8 –t 60
  • Result: 950Mbit/s

• Use parameter of -B in RHEL 7.3 :

  • Server: iperf –s –i 1
  • Client: iperf –c (bondX_ip) –B (local_ip) –w 2m –l 64k –i 1 –P 8 –t 60
  • Result: throughput can reach to 1.8Gbit/s