Install iperf on RHEL7

I use AWS and Azure all the time, it makes it very easy to spin up RHEL instances quickly, some times I need to use iperf, so here is a quick and simple way to install iperf on RHEL7

rpm -Uvh rpmforge-release-1.5.3-1.el7.rf.x86_64.rpm
yum update
yum install iperf