Negative packet loss???

Hi,
I ran a ping from our mikrotik server to 66.175.96.7, and we’ve -200% packet loss, only 27 packets sent and 81 received…Any idea what could be causing this?

66.175.96.7 56 117 163ms
sent=27 received=81 packet-loss=-200% min-rtt=106ms avg-rtt=110ms
max-rtt=163ms
HOST SIZE TTL TIME STATUS
66.175.96.7 56 117 163ms
66.175.96.7 56 117 114ms
66.175.96.7 56 117 116ms
66.175.96.7 56 117 116ms
66.175.96.7 56 117 106ms
66.175.96.7 56 117 108ms
66.175.96.7 56 117 108ms
66.175.96.7 56 117 124ms
66.175.96.7 56 117 124ms
66.175.96.7 56 117 124ms
66.175.96.7 56 117 106ms
66.175.96.7 56 117 110ms
66.175.96.7 56 117 113ms
sent=31 received=93 packet-loss=-200% min-rtt=106ms avg-rtt=110ms
max-rtt=163ms

There is something wrong on the target device. Here is my attempt to the same ip:

[admin@test] > /ping 66.175.96.7
HOST SIZE TTL TIME STATUS
66.175.96.7 56 113 79ms
66.175.96.7 56 113 79ms
66.175.96.7 56 113 79ms
66.175.96.7 56 113 74ms
66.175.96.7 56 113 76ms
66.175.96.7 56 113 76ms
66.175.96.7 56 113 77ms
66.175.96.7 56 113 78ms
66.175.96.7 56 113 78ms
66.175.96.7 56 113 75ms
66.175.96.7 56 113 77ms
66.175.96.7 56 113 77ms
66.175.96.7 56 113 104ms
66.175.96.7 56 113 104ms
66.175.96.7 56 113 104ms
sent=5 received=15 > packet-loss=-200% > min-rtt=74ms avg-rtt=82ms
max-rtt=104ms

Or maybe not? Here is a Windows box ping to the same ip

C:\Documents and Settings\user>ping 66.175.96.7

Pinging 66.175.96.7 with 32 bytes of data:

Reply from 66.175.96.7: bytes=32 time=78ms TTL=112
Reply from 66.175.96.7: bytes=32 time=89ms TTL=112
Reply from 66.175.96.7: bytes=32 time=89ms TTL=112
Reply from 66.175.96.7: bytes=32 time=75ms TTL=112

Ping statistics for 66.175.96.7:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 75ms, Maximum = 89ms, Average = 82ms

That’s the point, using CLI I get that weird value, but using WEB UI or Winbox I’ve no problem…any suggestion? Maybe a bug?

Linux doesn’t like that target ip either. It reports receiving dups.

[root@wifi ~]# ping 66.175.96.7
PING 66.175.96.7 (66.175.96.7) 56(84) bytes of data.
64 bytes from 66.175.96.7: icmp_req=1 ttl=113 time=96.2 ms
64 bytes from 66.175.96.7: icmp_req=1 ttl=113 time=96.3 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=1 ttl=113 time=96.3 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=2 ttl=113 time=76.0 ms
64 bytes from 66.175.96.7: icmp_req=2 ttl=113 time=76.3 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=2 ttl=113 time=76.3 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=3 ttl=113 time=76.1 ms
64 bytes from 66.175.96.7: icmp_req=3 ttl=113 time=76.2 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=3 ttl=113 time=76.5 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=4 ttl=113 time=75.6 ms
64 bytes from 66.175.96.7: icmp_req=4 ttl=113 time=75.7 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=4 ttl=113 time=75.7 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=5 ttl=113 time=89.8 ms
64 bytes from 66.175.96.7: icmp_req=5 ttl=113 time=90.5 ms (DUP!)
64 bytes from 66.175.96.7: icmp_req=5 ttl=113 time=90.5 ms (DUP!)
^C
— 66.175.96.7 ping statistics —
5 packets transmitted, 5 received, +10 duplicates, 0% packet loss, time 4006ms
rtt min/avg/max/mdev = 75.670/82.984/96.393/8.668 ms

You are simply receiving duplicate ICMP responces.

This can happen if the IP really is terminated on 3 devices, and all 3 respond to ping requests on that IP.
Since we dont know how the owner of the IP address distributes it internally, and has his equipment configured, this is completly normal.

Hi, I have the same problem. I have perfectly established a connection via sstp between two mikrotik of which one is virtualized. however when trying a ping to google dns, I get negative packet losses.
What could be causing this?

**********> ping 8.8.8.8 count=20
SEQ HOST SIZE TTL TIME STATUS
0 8.8.8.8 56 120 13ms
0 8.8.8.8 56 119 14ms
0 8.8.8.8 56 118 19ms
0 8.8.8.8 56 117 20ms
0 8.8.8.8 56 116 21ms
0 8.8.8.8 56 115 92ms
0 8.8.8.8 56 114 96ms
0 8.8.8.8 56 113 97ms
0 8.8.8.8 56 112 100ms
0 8.8.8.8 56 111 100ms
0 8.8.8.8 56 110 101ms
0 8.8.8.8 56 109 102ms
0 8.8.8.8 56 108 103ms
0 8.8.8.8 56 107 103ms
0 8.8.8.8 56 106 120ms
0 8.8.8.8 56 105 141ms
0 8.8.8.8 56 104 143ms
0 8.8.8.8 56 103 148ms
0 8.8.8.8 56 102 149ms
0 8.8.8.8 56 101 151ms
sent=1 received=20 packet-loss=-1900% min-rtt=13ms avg-rtt=91ms max-rtt=151ms