SNMP agent item "sysUpTime"

[francescoRo]

Hi all,

from many days I have a small problem with two Extreme Networks switches that I am not able to solve.
They don't want comunicate with zabbix via SNMP.
In the zabbix Front End, the error is: Timeout while connecting to "192.168.15.16:161"

The log entries are always like this:

SNMP agent item "sysUpTime" on host "Switch_1" failed: first network error, wait for 15 seconds
SNMP agent item "sysUpTime" on host "Switch_2" failed: first network error, wait for 15 seconds
temporarily disabling SNMP agent checks on host "Switch_1": host unavailable
temporarily disabling SNMP agent checks on host "Switch_2": host unavailable

I have 28 Extreme Networks switches, but only those two don't work.

The "funny" thing is that by SNMPWALK they seem working well:

Example of the snmpwalk's output:

[root@zabbix-2 ~]# snmpwalk -v2c -Os -On -cpublic 192.168.15.16 sysUpTime.0
.1.3.6.1.2.1.1.3.0 = Timeticks: (909123100) 105 days, 5:20:31.00

Someone have any ideas?

Thank you in advance

[filipp.sudanov]

The error means that this is some sort of network error, that does not allow a zabbix_server process to open a socket to the device. May be it's network itself, may be problem at your server. Selinux or some other security tools may cause problems to zabbix.

I believe, snmpwalk opens a socket just once and works with it all the time, while zabbix open and closes the socket for each request to the equipment.

[francescoRo]

I double checked the policy of our firewall, you were absolutely right.
Thank you very much. I should have thought of that before !!!

[Zzlo]

I double checked the policy of our firewall, you were absolutely right.

Well, i have same trouble - ESX host "unavailable", but 161 port opened on firewall and snmpwalk work perfect. Can you tell me, how you resolve 'SNMP agent item "sysUpTime"' exactly...

[teskistajer]

hello i am newbie , so if i understand correct other components of snmp works like bandwidth in or out, except only sysuptime ? then maybe check mib then type manually except auto discovery items