NMIS is a powerful network management system which is open source and free for a highly capable tool.
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Setup SNMP Trap Daemon
NMIS8 Setup
NMIS 8.4.1 has included some Cisco and Generic MIBS and added the ability to view the SNMP traps in the NMIS logging tool.
First you will want to make sure your servers NET-SNMP install is setup appropriately. Refer to these install instructions:
SNMPD, Net-SNMP and collecting stats of the NMIS server itself
Next you You will need to copy the options file to the right location and restart the daemon.
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cp /usr/local/nmis8/install/snmptrapd.options /etc/sysconfig/snmptrapd cp /usr/local/nmis8/install/snmptrapd.conf /etc/snmp/snmptrapd.conf service snmptrapd restart |
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CISCO-CONFIG-MAN-MIB::ccmHistoryEventConfigDestination.34 |
Configure a Cisco Router to Send Traps
If the IP address of your NMIS server is 192.168.1.7 and you want to use the community string public, these are the commands you need to send traps.
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snmp-server host 192.168.1.7 version 2c public |
or to use SNMP v2c Informs
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snmp-server host 192.168.1.7 informs version 2c public |
To enable all traps
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NMIS9 Setup
NMIS 9 has included some Cisco and Generic MIBS and added the ability to view the SNMP traps in the NMIS logging tool.
First you will want to make sure your servers NET-SNMP install is setup appropriately. Refer to these install instructions:
SNMPD, Net-SNMP and collecting stats of the NMIS server itself
CentOS/RHEL 7.x
Next you will need to copy the options file to the right location and restart the daemon.
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sudo cp /usr/local/nmis9/conf-default/snmpd/snmptrapd.options /etc/sysconfig/snmptrapd
sudo cp /usr/local/nmis9/conf-default/snmpd/snmptrapd.conf /etc/snmp/snmptrapd.conf
sudo service snmptrapd restart |
Verify Operation
You can test the MIB resolution with this command
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snmptranslate -m ALL -M /usr/local/nmis9/mibs/traps 1.3.6.1.4.1.9.9.43.1.1.6.1.5.34 |
Which should result in:
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CISCO-CONFIG-MAN-MIB::ccmHistoryEventConfigDestination.34 |
Send a Test Trap
To verify operation you can send a test trap either locally or from another Linux server, this example sends an Opmantek event trap.
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sudo snmptrap -v 2c -c public 127.0.0.1 80000 1.3.6.1.4.1.4818 1.3.6.1.4.1.4818.1 s Event |
The trap will appear in either /usr/local/nmis8/logs/trap.log or /usr/local/nmis9/logs/trap.log
Add New SNMP MIBS for Trap Processing
If you are receiving SNMP traps from devices which are just numbers, then you will need to add the MIBS so that the SNMP trap daemon can decode them them for you. First you need to identify the required MIB files and any dependant MIB files and then copy those files to the directory /usr/local/nmis8/mibs/traps and restart the SNMP trap daemon.
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You can test the decoding using the snmptranslate command, which was described in a previous section.