getting warnings/critical alerts from check_snmp / extend

[Fabrice Laborie]

Hi!

I am struggling to get check_snmp to return critical/warning info for a
simple "extend" in snmpd.conf
(extend minutecheck /bin/sh /usr/local/bin/minutecheck.sh ), while it is
working for ifInUcastPkts

I suspect that the comparison with the range may not be happening if the
returned value is not a Counter32.
the extend seems to be returning a STRING by default.

Is this the case ?
Can I force a cast from STRING to Counter32  by check_snmp ?
Or is there a way to get snmpd to return a Counter32 directly??

snmpget -v2c -c public  192.168.25.11
iso.3.6.1.4.1.8072.1.3.2.4.1.2.11.109.105.110.117.116.101.99.104.101.99.107.1
iso.3.6.1.2.1.2.2.1.11.1
iso.3.6.1.4.1.8072.1.3.2.4.1.2.11.109.105.110.117.116.101.99.104.101.99.107.1
= STRING: "19"
iso.3.6.1.2.1.2.2.1.11.1 = Counter32: 39514

/usr/local/nagios/libexec/check_snmp -H 192.168.25.11 -o
iso.3.6.1.2.1.2.2.1.11.1 -C public  -w @38000:38900 -c @38901:
SNMP CRITICAL - *39458* | IF-MIB::ifInUcastPkts.1=39458c
/usr/local/nagios/libexec/check_snmp -H 192.168.25.11 -o
iso.3.6.1.4.1.8072.1.3.2.4.1.2.11.109.105.110.117.116.101.99.104.101.99.107.1
-C public  -w @10:15 -c @16:
SNMP OK - 18 | NET-SNMP-EXTEND-MIB::nsExtendOutLine."minutecheck".1=18
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