SNMP Timeout but SNMPWalk is OK

[still_at_work]

Hello,

I have a Zabbix 6.4.16 server, deployed via Docker following the Zabbix documentation.

Since last week, my Zabbix SNMP probes are no longer working, and I get messages saying "Timeout while connecting to '1.2.3.4:161'".

What I don't understand is that my Zabbix server is able to perform an SNMP Walk correctly. I even tested doing the snmpwalk from my container:

docker exec -it --user=root zabbix-docker-zabbix-server-1 /bin/sh

/var/lib/zabbix # snmpwalk -v2c -c public 1.2.3.4

SNMPv2-MIB::sysDescr.0 = STRING: SNMPv2-MIB::sysObjectID.0 = OID: SNMPv2-SMI::enterprises.674.10892.5
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (587764066) 68 days, 0:40:40.66

Do you have any idea?

[vijayk]

You can check with increase the value of Timeout in config file of server as well as agent.
### Option: Timeout
# Specifies timeout for communications (in seconds).
#
# Mandatory: no
# Range: 1-30
# Default:
Timeout=30

[still_at_work]

Hi,

I just try with Timeout=30, no change.

Do you have another idea ?

[Markku]

Check the log file, increase the logging level as needed. Take a packet capture and see what the Zabbix poller it attempting, if anything.

Markku

[still_at_work]

I found my problem. In my host, I set SNMP Community with a global macro, {$SNMP_COMMUNITY}, wich have been deleted for an unknow reason.

Recreate this global macro with the correct value does the job !