Hi all, a strange thing happend to my router, after some years online whitout any issues, i’ll explain:
from my zabbix receive alert Interface lan-server(): High bandwidth usage >90% and Interface lan-client(): High bandwidth usage >90%, this networks are our client and server networks, so it was very high traffic which lasted several minutes and firewall restarted itself!
So configuration was broken, i’ve lost my bridge and i had to riconfigure them, after this everithings works again except…i can’t ping again any firewall interfaces 
- why firewall restart itself?
2)why can’t ping?
i had this firewall from 2/3 years, i’ve recently upgraded it to last release
add action=accept chain=input comment="default configuration" protocol=icmp
/interface bridge
add admin-mac=D4:CA:6D:7A:7E:29 auto-mac=no comment=\
"created from master port" name=bridge1 protocol-mode=none
add name=lan-client
add admin-mac=D4:CA:6D:7A:7E:24 auto-mac=no fast-forward=no name=lan-server
add fast-forward=no name=vecchia-dmz
add fast-forward=no name=wifi
/interface ethernet
set [ find default-name=ether1 ] name=ether1-gateway speed=100Mbps
set [ find default-name=ether2 ] name=ether2-lan-server speed=100Mbps
set [ find default-name=ether3 ] name=ether3-ivo-gw speed=100Mbps
set [ find default-name=ether4 ] disabled=yes name=ether4-slave-local speed=\
100Mbps
set [ find default-name=ether5 ] disabled=yes name=ether5-slave-local speed=\
100Mbps
set [ find default-name=ether6 ] name=ether6-lan-client speed=100Mbps
set [ find default-name=ether7 ] disabled=yes name=ether7-slave-local speed=\
100Mbps
set [ find default-name=ether8 ] disabled=yes name=ether8-slave-local speed=\
100Mbps
set [ find default-name=ether9 ] name=ether9-wifi speed=100Mbps
set [ find default-name=ether10 ] name=ether10-vecchia-dmz speed=100Mbps
set [ find default-name=sfp1 ] advertise=\
10M-half,10M-full,100M-half,100M-full,1000M-half,1000M-full disabled=yes
reagards