Query and monitor SNMP-compatible device
SNMP Test for routers is a tool that queries and monitors SNMP-compatible devices however it is particularly designed to test SNMP router compatibility. The 1st part of the take a look at queries the system name and system description strings, the forwarding flag and enumerates all the exposed interfaces. The 2nd part of the take a look at monitors SNMP traps from the device (your system should be configured to receive traps from the device). While the monitoring is running, trigger some events e.g. connection and disconnection of the Internet line and see if those events are reported in the application.