how to know tunnel is connected?

[moeinrahimi1]

both server has ping and can connect through ssh but when i try to ping created interface i get destination unreachable
i do this on iran: ping 10.30.30.2
root@mechanical-aqua:~# ping 10.30.30.2
PING 10.30.30.2 (10.30.30.2) 56(84) bytes of data.
From 10.30.30.1 icmp_seq=1 Destination Host Unreachable
From 10.30.30.1 icmp_seq=2 Destination Host Unreachable
From 10.30.30.1 icmp_seq=3 Destination Host Unreachable
From 10.30.30.1 icmp_seq=4 Destination Host Unreachable
From 10.30.30.1 icmp_seq=5 Destination Host Unreachable
From 10.30.30.1 icmp_seq=6 Destination Host Unreachable
From 10.30.30.1 icmp_seq=7 Destination Host Unreachable
From 10.30.30.1 icmp_seq=8 Destination Host Unreachable
From 10.30.30.1 icmp_seq=9 Destination Host Unreachable