Be sure to install snmpsim first by: Making sure pip is installed For CentOS 7 sudo yum install epel-release sudo yum -y install python-pip sudo pip install snmpsim
snmpwalk and snmprec files for simulating devices
Edit your /etc/hosts file
127.0.0.1 localhost snmpsim
You may add more if you would like to add multiple test devices to LibreNMS.
Use the provided script
./snmpsim.sh
Or run by hand
snmpsimd.py --data-dir=./captures --agent-udpv4-endpoint=127.0.0.1:1161
Using systemd, we can automatically start snmpsimd.py whenever a connection is started to udp:1161 and restart it whenever a capture file is changed, added, or removed.
- Copy the systemd files to /etc/systemd/system
cp scripts/systemd/* /etc/systemd/system/
-
Edit snmpsimd.service and snmpsim-watch.path and put in the correct paths and user.
-
Enable and start the proper units:
systemctl enable --now snmpsimd.socket snmpsim-watch.path
Use either the command line or the webui to add a new host to LibreNMS.
Hostname: snmpsim (or anything you added to hosts) Community:
./addhost.php snmpsim ucd v2c 1161
You may either remove then re-add the device or simply change the SNMP community string. Re-run discovery and poller.
Alternatively, you could add multiple hostname alias' to the /etc/hosts file.
Two formats are allowed snmprec and snmpwalk. Try to review files for private information before submitting to this repository.
Basic usage
snmprec.py --agent-udpv4-endpoint=HOSTNAME --community=COMMUNITY
See the snmpsim documentation for details on capturing snmprec files.
Snmpwalk files must be in number only format (-On), otherwise, snmpsim will not start.
translate-snmpwalk.py is provide to convert user provide snmpwalks to a number only format.