Router will decrement TTL value within IP packet.
"ping" can be used to simulate how ICMP works in more complex tool such as "mtr", "traceroute".
Please try increasing ttl-value against any target machine is ICMP is enabled along the route.
on unix/linux: ping -t
on windows: ping -i target-ip
We can conduct an incremental testing with one ICMP packet each time:
ping -t 1 -c 1 www.yahoo.com
ping -t 2 -c 1 www.yahoo.com
...
ping -t 1 -c 1 www.yahoo.com
ping -t 2 -c 1 www.yahoo.com
...
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