echo "Starting simulation on VIRL server"
VIRL_TOPOLOGY=double-ring-nested.xenial
-VIRL_RELEASE=csit-ubuntu-16.04.1_2016-12-19_1.6
+VIRL_RELEASE=csit-ubuntu-16.04.1_2017-07-26_1.9
function stop_virl_simulation {
ssh ${SSH_OPTIONS} ${VIRL_USERNAME}@${VIRL_SERVER}\