Cisco Routers SNMP Trap issue

Hi, I have setup a NAV 3.12.2 and started to add Cisco L2 and L3 equipment into the seed database. I use an other software to monitor the devices as well. When it comes to Cisco routers (not Cisco L3 switches) I get many SNMP Traps "Too many SNMP authentication failures . Check for hacking attempt on x.x.x.x" and "SNMP incorrect community name...". I am aware of the issue/design of NAV when it comes to VLAN browsing and that this might be the case. Is there any configuration I can set on Cisco routers or in NAV to prevent this kind of behavior? I need to have the traps in case there actual is an SNMP brute force attempt. Kind Regards Mattias Torsfred Systemconsultant Funn IT