I try to set up a site 2 site vpn.
Master ist border 3.8 with tunnel ip

Which tunnel ip do i have to give to the (non border) VPN slave?
A ip in the same range? (f.e. or a ip in a other range (f.e.

Regardless of which ip I give the slave tunnel, I am not able to ping this

VPN tunnel is OK, but I am also not able to ping to the other network.

Please help me!