this is a bug report for RV082 hardware version 3 and 4, firmware version 1.x, 2.x and 4.x (all latest versions). I hope someone from cisco/belkin reads it.
The snmp interface number of a VPN Tunnel change when the VPN tunnel disconnect and then re-connects.
What should happend:
The VPN Tunnel number 1, should always have the same snmp interface number. In RV082 v4, this number should always be 10. For example, the LAN, WAN1 and WAN2 always have the same snmp interface number.
What is the problem:
The VPN Tunnel number 1 change the snmp interface number, from 10, to 11, to 12, etc.
How to reproduce:
create a VPN Tunnel using 2 RV082 or 1 RV082 and 1 RV042. Once the VPN Tunnel is connected write down the snmp interface number. A few days later, disconnect the cable of block internet access. Then restore the internet conection and write down the snmp interface number, you should note that the snmp interface number have changed.
PRTG Network Monitor
Please take a look at the attached image, note all the "ppp" interfaces, theres only 1 VPN Tunnel (gateway-to-gateway) defined.