For testing SNMP I am using MIB browser. For this task you will need to download and install MIB browser: (http://ireasoning.com/downloadmibbrowserlicense.shtml).
Step 1. Install the SNMP package via Package Manager (menu System> Package Manager).
Step 2. Enable SNMP and Remote access for SNMP service on the menu Services > SNMP. Leave everything else by default.
Step 2. Open MIB browser on your PC.
Step 3. Download MIB file from your router and load it to the browser.
Step 4. Configure IP address of the RUT240 and SNMPv2 in advanced section on MIB browser.
Step 5. Select “Get Bulk” in the top right corner, press “Go”. You should get info from the router.
Step 6. Use MIB browser to get sent/received data from the router.
OID for received packets count: .126.96.36.199.4.1.486188.8.131.52
OID for sent packets count: .184.108.40.206.4.1.486220.127.116.11