check_snmp sending wrong timeout to snmpget.

[Freeze]

If you use the check_snmp plugin with the -t flag, it sends the wrong value for -t to /usr/bin/snmpget. For instance, if you tell it to use a timeout of 30, it sends 7 to snmpget.

Example output:

[root@core libexec]# ./check_snmp -H x.x.x.x -t 30 -o sysName.0 -vvv

/usr/local/bin/snmpget -Le -t 7 -r 5 -m ALL -v 1 [authpriv] x.x.x.x:161 sysName.0

Notice the -t 30 and -t 7

https://support.nagios.com/forum/viewtopic.php?f=35&t=36087&p=163900#p163900

[jfrickson]

This is working as designed. The timeout sent to snmpget is the -t timeout (defaults to 10 seconds) divided by the number of retries (defaults to 5) plus 1. So using defaults: 10 / 5 + 1 = 3. Using -t 30 results in 30 / 5 + 1 = 7.

The reasoning is -t is the plugin timeout, not the socket timeout. Plugin timeout divided by number of retries is the socket timeout.