root@OpenWrt:~# ping 4.2.2.1
PING 4.2.2.1 (4.2.2.1): 56 data bytes
64 bytes from 4.2.2.1: icmp_seq=0 ttl=248 time=15.1 ms
64 bytes from 4.2.2.1: icmp_seq=1 ttl=248 time=16.2 ms
64 bytes from 4.2.2.1: icmp_seq=2 ttl=248 time=20.2 ms
64 bytes from 4.2.2.1: icmp_seq=3 ttl=248 time=14.1 ms
64 bytes from 4.2.2.1: icmp_seq=4 ttl=248 time=14.1 ms
64 bytes from 4.2.2.1: icmp_seq=5 ttl=248 time=13.6 ms