VPN tunnel not coming up

Hello,
Can anyone help, not able to get the VPN tunnel up until I generate traffic from the end device (example- ping from laptop connected to Sierra), as in my setup there will be no end device connected, is there an option or script I can run in my Airlink RV50 modem which pings the remote site every 2minutes (or whatever the interval time) to keep the tunnel alive?

Thanks
Hasrat