測試環境：CentOS6.5兩臺測試機
測試命令：iperf -s
iperf -c 192.168.1.111 -P 30 -t 60
錯誤提示：
[root@tc ~]# iperf -c 192.168.1.111 -P 30 -t 60
connect failed: No route to host
connect failed: No route to host
write1 failed: Broken pipe
write1 failed: Broken pipe
write2 failed: Connection refused
[ 16] 0.0- 2.0 sec 1.19 MBytes 4.97 Mbits/sec
[ 16] Sent 846 datagrams
[ 4] WARNING: did not receive ack of last datagram after 10 tries.
錯誤原因：測試時需要關閉防火牆
service iptables stop 關閉防火牆即可。