PING 10.138.21.1 (10.138.21.1) 56(84) bytes of data.
64 bytes from 10.138.21.1: icmp_req=1 ttl=59 time=12.6 ms
64 bytes from 10.138.21.1: icmp_req=2 ttl=59 time=18.5 ms
64 bytes from 10.138.21.1: icmp_req=3 ttl=59 time=9.84 ms
64 bytes from 10.138.21.1: icmp_req=4 ttl=59 time=16.0 ms
64 bytes from 10.138.21.1: icmp_req=5 ttl=59 time=6.49 ms

--- 10.138.21.1 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 3998ms
rtt min/avg/max/mdev = 6.497/12.723/18.564/4.296 ms