Recently, I retrieve rectifier-related SNMP data from Eltek’s Smartpack Controller. This one has the following rear type where we can connect to the ethernet plug (see the purple area). It is presumably in its default configuration and I can snmpwalk through its corporate specific OIDs (under 12148 tree) to find i.e. output voltage, current, battery [...]
When it comes to writing our own MIB, a practical choice might be to write the whole objects as of scalar type (RFC-1212). That means, let’s say we have 2 battery statuses, each of them must be explicitly written individually within the MIB file. Example of calling their voltages: $ snmpwalk -m +REKTRONIK-MIB -v 1 [...]
Net-SNMP wiki gives tutorial on extending snmpd using Perl. In basic run of Raddle (previous post) this involves r1.pl called by r1.conf fed to snmpd. Private enterprise MIB i.e. Microchip’s in this example can be replayed without really ever captured the real device’s SNMP data. This is necessary when the actual device is yet existed; normal [...]
Raddle is a great SNMP player written in Perl. I say player to this emulator application, meaning that I can append or dump snmpwalk output from a device and then replay that from Raddle. Installing it can be both simple and tedious tasks. I used Red Hat Enterprise Linux 5.2 inside a virtual machine (VirtualBox) [...]
A successful installation in a LAMP system may require more library. I added php5-cli to enable php through command line i.e $ /usr/bin/php , libphp-adodb, php5-snmp. In localhost snmpd is installed and configured /etc/default/snmpd: SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid’ and edit /etc/snmp/snmpd.conf to have: com2sec readonly localhost <some community string> Install [...]
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