Before using this make sure you allocate 6GB. 2 cores
Install openswitch and init a br-int bridge
yum -y install make gcc openssl-devel autoconf automake rpm-build redhat-rpm-config python-devel openssl-devel kernel-devel kernel-debug-devel libtool wget
mkdir -p ~/rpmbuild/SOURCES
wget http://openvswitch.org/releases/openvswitch-2.5.1.tar.gz
cp openvswitch-2.5.1.tar.gz ~/rpmbuild/SOURCES/