rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm

rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm

rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-7.noarch.rpm

yum search bandwidthd
yum install bandwidthd

vim /etc/bandwidthd.conf

subnet 0.0.0.0 0.0.0.0
or
subnet 0.0.0.0/0

/etc/init.d/bandwidthd start