Duplicate packets

[cae_technology]

When pinging mymail both from external and vpn, we are getting duplicate packets.

This was initially found with exchange but I believe it affects all addresses.

Can  this indicates an issue on the network?

Many thanks,

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=0 ttl=115 time=12.499 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=0 ttl=115 time=12.524 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=0 ttl=115 time=12.531 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=1 ttl=115 time=29.120 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=1 ttl=115 time=29.138 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=1 ttl=115 time=29.143 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=2 ttl=115 time=13.355 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=2 ttl=115 time=13.381 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=2 ttl=115 time=13.775 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=3 ttl=115 time=12.324 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=3 ttl=115 time=12.433 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=3 ttl=115 time=12.518 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=4 ttl=115 time=12.636 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=4 ttl=115 time=12.665 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=4 ttl=115 time=12.674 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=5 ttl=115 time=12.737 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=5 ttl=115 time=12.766 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=5 ttl=115 time=12.776 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=6 ttl=115 time=13.908 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=6 ttl=115 time=13.984 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=6 ttl=115 time=13.994 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=7 ttl=115 time=12.679 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=7 ttl=115 time=12.709 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=7 ttl=115 time=12.717 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=8 ttl=115 time=37.257 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=8 ttl=115 time=37.286 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=8 ttl=115 time=38.178 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=9 ttl=115 time=12.523 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=9 ttl=115 time=12.542 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=9 ttl=115 time=12.549 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=10 ttl=115 time=19.862 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=10 ttl=115 time=19.897 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=10 ttl=115 time=19.905 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=11 ttl=115 time=12.791 ms

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=11 ttl=115 time=12.810 ms (DUP!)

64 bytes from 89.187.100.70 <http://89.187.100.70> icmp_seq=11 ttl=115 time=12.892 ms (DUP!)

64 bytes from 172.31.1.60: icmp_seq=0 ttl=125 time=24.931 ms

64 bytes from 172.31.1.60: icmp_seq=0 ttl=125 time=24.972 ms (DUP!)

64 bytes from 172.31.1.60: icmp_seq=0 ttl=125 time=25.450 ms (DUP!)

64 bytes from 172.31.1.60: icmp_seq=1 ttl=125 time=12.706 ms

64 bytes from 172.31.1.60: icmp_seq=1 ttl=125 time=12.718 ms (DUP!)

64 bytes from 172.31.1.60: icmp_seq=1 ttl=125 time=12.721 ms (DUP!)

64 bytes from 172.31.1.60: icmp_seq=2 ttl=125 time=12.906 ms

64 bytes from 172.31.1.60: icmp_seq=2 ttl=125 time=12.950 ms (DUP!)

64 bytes from 172.31.1.60: icmp_seq=2 ttl=125 time=12.978 ms (DUP!)

64 bytes from 172.31.1.60: icmp_seq=3 ttl=125 time=12.552 ms

64 bytes from 172.31.1.60: icmp_seq=3 ttl=125 time=12.567 ms (DUP!)

64 bytes from 172.31.1.60: icmp_seq=3 ttl=125 time=12.570 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=0 ttl=126 time=13.165 ms

64 bytes from 172.31.1.1: icmp_seq=0 ttl=126 time=13.195 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=1 ttl=126 time=12.776 ms

64 bytes from 172.31.1.1: icmp_seq=1 ttl=126 time=12.807 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=2 ttl=126 time=12.701 ms

64 bytes from 172.31.1.1: icmp_seq=2 ttl=126 time=12.712 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=3 ttl=126 time=13.117 ms

64 bytes from 172.31.1.1: icmp_seq=3 ttl=126 time=13.269 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=4 ttl=126 time=12.641 ms

64 bytes from 172.31.1.1: icmp_seq=4 ttl=126 time=12.651 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=5 ttl=126 time=13.512 ms

64 bytes from 172.31.1.1: icmp_seq=5 ttl=126 time=13.534 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=6 ttl=126 time=12.762 ms

64 bytes from 172.31.1.1: icmp_seq=6 ttl=126 time=12.774 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=7 ttl=126 time=13.251 ms

64 bytes from 172.31.1.1: icmp_seq=7 ttl=126 time=13.262 ms (DUP!)

64 bytes from 172.31.1.1: icmp_seq=8 ttl=126 time=13.340 ms

64 bytes from 172.31.1.1: icmp_seq=8 ttl=126 time=13.594 ms (DUP!)

[balaji.bandi]

what is this IP address .1 .60 and .70 ?

Normal we see - Client ICMP request, indicates receipt of an ICMP reply an already received ICMP sequence number.

Please give more information to justify better.

[cae_technology]

I am pinging my email !! 

[balaji.bandi]

you mean email servers ?

[marce1000]

 - Various reasons possible  , you may find this thread informational :

              https://community.cisco.com/t5/switching/ping-with-dup-results/td-p/977909

 M.