Figure 5: UNIX ping reporting network link problems

# ping -v 10.1.1.1
PING 10.1.1.1: 64 byte packets
36 bytes from 192.168.23.180: icmp_type=3 (Dest Unreachable)
36 bytes from 192.168.23.180: icmp_type=3 (Dest Unreachable)