Update install.sh
diff --git a/install.sh b/install.sh
index ea7f7b1..58a3433 100644
--- a/install.sh
+++ b/install.sh
@@ -232,6 +232,8 @@
     info "KVM host configured"
     virsh nodeinfo
   fi
+  virsh net-destroy default || true
+  virsh net-undefine default || true
 }
 
 deploy_cloudstack() {