Setup snmp and snmptrap monitoring under Zabbix

Jephe Wu - http://linuxtechres.blogspot.com

Objective: understanding snmp, snmptrap under zabbix

Note:For zabbix, –with-net-snmp zabbix compiling option is not needed if you only want to receive traps. if you also want to poll snmp, then it is required.


part I - snmp monitoring - snmpget, snmpwalk

1. snmp items with zabbix
refer to http://www.zabbix.com/wiki/howto/monitor/snmp/snmp?s[]=snmp&s[]=item


2. get snmp item name
# snmpwalk snmpserver -v1 -c public
# snmpwalk -c public -v 2c ipaddress


root@snmp:~/ # snmpget -c public -v 1 172.16.62.3 .1.3.6.1.4.1.9.9.171.1.2.1.1.0
SNMPv2-SMI::enterprises.9.9.171.1.2.1.1.0 = Gauge32: 9

Note: 1.3.6.1.4.1.9.9.171.1.2.1.1 is a cisco ipsec mib at http://www.oidview.com/mibs/9/CISCO-IPSEC-FLOW-MONITOR-MIB.html, refer to cikeGlobalActiveTunnels


Refer to free snmp MIB library at http://www.oidview.com/mibs/detail.html
and http://www.iana.org/assignments/enterprise-numbers

Part II - snmptrap


1. snmptrapd.conf 
root@snmptrap:/etc/snmp/ # chkconfig --list snmptrapd
snmptrapd       0:off 1:off 2:on 3:on 4:on 5:on 6:off


root@snmptrap:/etc/snmp/ # /etc/init.d/snmptrapd status
snmptrapd (pid  27227) is running...


root@snmptrap:/etc/snmp/ # more snmptrapd.conf 
authCommunity execute public
authCommunity execute PUBLIC
disableAuthorization yes
#log syslog
traphandle default /usr/bin/zabbix_snmptraphandler.pl
traphandle default /usr/bin/perl /usr/bin/traptoemail -s jephe.mailserver.com -f snmptrap@snmptrap.domain jwu@domain.com


Note: if community string is not public, please change the first/second line.
refer to http://www.zabbix.com/wiki/howto/monitor/snmp/snmp_traps_-_a_new_solution for traphandle perl script




2. test it from snmptrap server itself, you should receive email.
# snmptrap -Ci -v 2c -c public localhost "" "NET-SNMP-MIB::netSnmpExperimental" NET-SNMP-MIB:netSnmpExperimental s "test"


root@snmptrap:/etc/snmp/ # which snmptrap
/usr/bin/snmptrap
root@snmptrap:/etc/snmp/ # rpm -qf /usr/bin/snmptrap
net-snmp-utils-5.3.2.2-14.el5_7.1


Note: you might want to look at SNMPTT at http://snmptt.sourceforge.net/ 




3. sample zabbix templates for snmp devices


http://www.zabbix.com/wiki/templates/cisco_2960



Part III - References
http://www.zabbix.com/wiki/howto/monitor/snmp/a_simple_snmp_trap_handler
http://www.oidview.com/mibs/detail.html
http://www.iana.org/assignments/enterprise-numbers

http://ireasoning.com/mibbrowser.shtml  (better to use for snmp walk)
http://www.manageengine.com/products/mibbrowser-free-tool/download.html  (absolutely free, for snmpwalk, put .iso.org.dod.internet.mgmt in the Object ID column, then click 'snmpwalk' button)

http://www.youtube.com/watch?v=TiBrB0qxQao
http://www.youtube.com/watch?v=J0fPuXZySXE&feature=related
http://www.youtube.com/watch?v=biH-UAPxo_0&feature=related