A Short video about how to troubleshoot a Packet Drops issues.
From Router perspective what are the details we need to check i have explained.

Commands used
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ipv4 access-list Test-SIVA 10 permit icmp host 2.2.2.2 host 1.1.1.1 echo
ipv4 access-list Test-SIVA 20 permit icmp host 1.1.1.1 host 2.2.2.2 echo-reply
ipv4 access-list Test-SIVA 30 permit ipv4 any any

interface Gig0/0/0/1
ipv4 access-group Test-SIVA ingress hardware-count
ipv4 access-group Test-SIVA egress hardware-count

show access-lists Test-SIVA hardware egress location 0/0/CPU0
show access-lists Test-SIVA hardware ingress location 0/0/CPU0

show controllers interface gi0/0/0/1 stats | i pkts

ping 1.1.1.1 source 2.2.2.2 repeat 10

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