without switch 3900
ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=1.00 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.593 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.586 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.551 ms