For troubleshooting Can you please share the troubleshoot file with the latest version? Also please share the complete file as it contains logs and more information to find the issue.
You can share it through private message if don't want to share it here.
Also, please share the IPSEC configuration on both RUTX12 and Draytek 2860
There are a couple of suggestions that can help you with IPSEC:
1. Make sure the configurations on both sides (Server and Client ) are the same, except for IPs.
2. You can check if the tunnel has been established using the <ipsec status> command.
3. Make sure the configurations for phase 1 and phase 2 are ideal for (Server and Client ).
4. Make sure your subnets are not the same, and your network does not overlap with each other.