PING 10.138.21.129 (10.138.21.129) 56(84) bytes of data.
64 bytes from 10.138.21.129: icmp_seq=1 ttl=61 time=18.8 ms
64 bytes from 10.138.21.129: icmp_seq=2 ttl=61 time=39.9 ms
64 bytes from 10.138.21.129: icmp_seq=3 ttl=61 time=9.28 ms
64 bytes from 10.138.21.129: icmp_seq=4 ttl=61 time=9.72 ms
64 bytes from 10.138.21.129: icmp_seq=5 ttl=61 time=8.43 ms

--- 10.138.21.129 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4003ms
rtt min/avg/max/mdev = 8.432/17.244/39.952/11.965 ms