[VRT-402N] How to setup VRT-402N's VPN tunnels with VRT-401 / VRT-311S?

Please check the Power point file for the setup of the both devices.

Be reminded, most of the time, your link should be fine with the Power point (FAQ_How to setup VRT-402N with VRT401_311s.pps) example.
However, if you encounter the link faile, please check tha:

- Have you key in the correct WAN IP for both ends.
- Have you key in the correct IP Subnet for both ends.
- Have you choose the correct Encryption for both ends. Say, Phase 1, phase 2.