icmppingloss strange behavior

[banzayats]

There is the icmppingloss check in the default "Template ICMP Ping" template. I did not change anything. So by default Zabbix uses fping and sends 3 packets and if there any loss we will see one of the following: 33%, 66% 100%.

But on several hosts I see 50%? How can it be?!

> ps aux  | grep fping
zabbix   30771  0.0  0.0   4336   720 ?        S    12:09   0:00 sh -c /usr/bin/fping -C3 2>&1 </tmp/zabbix_server_40472.pinger;/usr/bin/fping6 -C3 2>&1 </tmp/zabbix_server_40472.pinger;
zabbix   30775  0.0  0.0   4336   720 ?        S    12:09   0:00 sh -c /usr/bin/fping -C3 2>&1 </tmp/zabbix_server_40456.pinger;/usr/bin/fping6 -C3 2>&1 </tmp/zabbix_server_40456.pinger;
zabbix   30778  0.0  0.0   4336   716 ?        S    12:09   0:00 sh -c /usr/bin/fping -C3 2>&1 </tmp/zabbix_server_40454.pinger;/usr/bin/fping6 -C3 2>&1 </tmp/zabbix_server_40454.pinger;
zabbix   30779  0.0  0.0  12088  1864 ?        S    12:09   0:00 /usr/bin/fping -C3
zabbix   30780  0.0  0.0  12084  1816 ?        S    12:09   0:00 /usr/bin/fping6 -C3
zabbix   30810  0.0  0.0  12084  1916 ?        S    12:09   0:00 /usr/bin/fping6 -C3
zabbix   30811  0.0  0.0   4336   808 ?        S    12:09   0:00 sh -c /usr/bin/fping -C3 2>&1 </tmp/zabbix_server_40458.pinger;/usr/bin/fping6 -C3 2>&1 </tmp/zabbix_server_40458.pinger;

[richlv]

which version of zabbix ?
one quick guess - on those hosts, ipv4 succeeds but ipv6 fails, which could give you 50%. you could try comparing fping with v4/v6 against one host that works as you expect it, and one that does not.

[banzayats]

Thanks a lot!

I've disabled fping6 and the issue went away.

Fping6Location=