Host SNMP Configuration
First install Net-SNMP :
root@ubuntu:~# apt-get install snmpd
root@redhat:~# yum install net-snmp
Ubuntu: make sure the SNMPDOPTS line in /etc/default/snmpd looks like this
SNMPDOPTS='-Lsd -Lf /dev/null -u snmp -p /var/run/snmpd.pid'
Redhat: make sure the OPTIONS line in /etc/sysconfig/snmpd looks like this
OPTIONS="-Lsd -Lf /dev/null -p /var/run/snmpd.pid"
This also disables logging and as such gets rid of annoying "features" like
snmpd[4990]: Connection from UDP: 1.2.3.4
Replace the default /etc/snmp/snmpd.conf file with something like this, changing the community, location and contact fields
com2sec readonly default <COMMUNITY> group MyROGroup v1 readonly group MyROGroup v2c readonly group MyROGroup usm readonly view all included .1 80 access MyROGroup "" any noauth exact all none none syslocation <LOCATION> syscontact <CONTACT>
- This line allows Observium to detect the host OS if the distro script is installed
extend .1.3.6.1.4.1.2021.7890.1 distro /usr/bin/distro
Get the observium 'distro' script to identify your distribution via SNMP
wget http://www.observium.org/svn/observer/trunk/scripts/distro mv distro /usr/bin/distro chmod 755 /usr/bin/distro
You should then be able to restart snmpd
root@server:~# /etc/init.d/snmpd restart
And then add the device to your Observium installation! On devices with a large routing table
You may encounter sloppy SNMP responsiveness and high host load with too many routes installed in combination with netsnmp. Also see this Debian bugreport of a few years back. The last post seems to fix this issue, so if you are running full table, add these lines to snmpd.conf as well:
view all included .1 80 view all excluded .1.3.6.1.2.1.4.21 view all excluded .1.3.6.1.2.1.4.24 view system included .iso.org.dod.internet.mgmt.mib-2.system
